WO2024199115A1 - Acid-corrosion-resistant wear-resistant steel for coal mining and transportation and preparation method therefor - Google Patents
Acid-corrosion-resistant wear-resistant steel for coal mining and transportation and preparation method therefor Download PDFInfo
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- WO2024199115A1 WO2024199115A1 PCT/CN2024/083252 CN2024083252W WO2024199115A1 WO 2024199115 A1 WO2024199115 A1 WO 2024199115A1 CN 2024083252 W CN2024083252 W CN 2024083252W WO 2024199115 A1 WO2024199115 A1 WO 2024199115A1
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- Prior art keywords
- wear
- resistant
- rolling
- steel
- resistant steel
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 133
- 239000010959 steel Substances 0.000 title claims abstract description 133
- 238000005260 corrosion Methods 0.000 title claims abstract description 112
- 239000003245 coal Substances 0.000 title claims abstract description 47
- 238000005065 mining Methods 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 230000007797 corrosion Effects 0.000 claims abstract description 107
- 238000005096 rolling process Methods 0.000 claims abstract description 70
- 238000010438 heat treatment Methods 0.000 claims abstract description 22
- 238000010791 quenching Methods 0.000 claims abstract description 20
- 230000000171 quenching effect Effects 0.000 claims abstract description 20
- 238000003723 Smelting Methods 0.000 claims abstract description 18
- 239000000956 alloy Substances 0.000 claims abstract description 14
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 13
- 238000005496 tempering Methods 0.000 claims abstract description 12
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 10
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 9
- 238000007670 refining Methods 0.000 claims abstract description 9
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 9
- 238000009749 continuous casting Methods 0.000 claims abstract description 8
- 239000012535 impurity Substances 0.000 claims abstract description 8
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 8
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 7
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 6
- 239000002253 acid Substances 0.000 claims description 48
- 238000000034 method Methods 0.000 claims description 21
- 229910000734 martensite Inorganic materials 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 18
- 230000009467 reduction Effects 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000000126 substance Substances 0.000 claims description 12
- 239000002893 slag Substances 0.000 claims description 10
- 229910052719 titanium Inorganic materials 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 8
- 229910001566 austenite Inorganic materials 0.000 claims description 7
- 238000005516 engineering process Methods 0.000 claims description 7
- 229910052720 vanadium Inorganic materials 0.000 claims description 7
- 229910052796 boron Inorganic materials 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 4
- 238000005275 alloying Methods 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- 239000005997 Calcium carbide Substances 0.000 claims description 2
- 229910000604 Ferrochrome Inorganic materials 0.000 claims description 2
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims 1
- 239000011651 chromium Substances 0.000 description 17
- 239000011572 manganese Substances 0.000 description 15
- 238000004519 manufacturing process Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 9
- 230000033558 biomineral tissue development Effects 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 230000002378 acidificating effect Effects 0.000 description 7
- 239000000243 solution Substances 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 229910001563 bainite Inorganic materials 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 238000002791 soaking Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 239000006104 solid solution Substances 0.000 description 3
- 239000002436 steel type Substances 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- 229910052758 niobium Inorganic materials 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910001339 C alloy Inorganic materials 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- -1 Cr1.5%~1.8% Inorganic materials 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 101000827703 Homo sapiens Polyphosphoinositide phosphatase Proteins 0.000 description 1
- 229910000617 Mangalloy Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 102100023591 Polyphosphoinositide phosphatase Human genes 0.000 description 1
- 101100012902 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) FIG2 gene Proteins 0.000 description 1
- 101100233916 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) KAR5 gene Proteins 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 229910000870 Weathering steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 229910001567 cementite Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 210000002381 plasma Anatomy 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000008261 resistance mechanism Effects 0.000 description 1
- 229910052702 rhenium Inorganic materials 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 229910052569 sulfide mineral Inorganic materials 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000001238 wet grinding Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
- 229910006540 α-FeOOH Inorganic materials 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
- B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/58—Roll-force control; Roll-gap control
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
- C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Definitions
- the present invention belongs to the technical field of alloy steel materials, and in particular relates to an acid corrosion resistant wear-resistant steel plate for coal mining and a preparation method thereof.
- the wear-resistant steel of the present invention is particularly suitable for wear-resistant key components in low pH environment and high mineralization coal mining.
- Wear-resistant steel is widely used in key wear-resistant parts such as mining machinery, coal mining and transportation, building materials machinery, and railway transportation to meet the use requirements of large equipment under harsh working conditions.
- my country's coal mining and transportation consumes up to 300,000 tons of wear-resistant steel plates per year.
- my country has developed a variety of new wear-resistant steel materials.
- the medium-high manganese austenite series wear-resistant steel uses the surface strain under large impact loads or contact stress to induce martensitic phase transformation, which makes the surface hardness increase sharply, thereby improving wear resistance.
- medium and low alloy wear-resistant steel with easy processing and weldability is mainly martensite or bainite structure.
- traditional wear-resistant cast steel it has higher strength, hardness and certain toughness. Its production process is relatively simple, and the comprehensive economy is reasonable, and it has been widely produced and applied.
- 400NM grade wear-resistant steel is widely used, and there are many manufacturers.
- Chinese invention patent CN104662193 A discloses a "wear-resistant steel plate with excellent low-temperature toughness and corrosion and wear performance". Its chemical composition (by mass percentage) is: C: 0.10-0.20%, Si: 0.05-1.00%, Mn: 0.1-2.0%, P: less than 0.020%, S: less than 0.005%, Al: 0.005-0.100%, and further contains 1 or 2 selected from Cr: 0.05-2.0%, Mo: 0.05-1.0%.
- the document "Abrasion resistance of low alloy martensitic steel containing antimony" studied the effect of Sb addition on the wear resistance of low alloy martensitic steel with the following composition.
- the above steel contains C: 0.16-0.18% by mass percentage, and contains appropriate amounts of Si, Mn, Al, Ti, Mo, B, Cr1.5% ⁇ 1.8%, Cu: 0.5 ⁇ 0.6% and Sb0% and 0.2%.
- After hot rolling, quenching at a temperature above the Ar 3 phase transformation point and low temperature tempering treatment were performed to obtain wear-resistant steel with HRC>40, and it was found that the addition of Sb element improved the corrosion resistance of steel in acidic high chloride ion and high sulfate ion environment, ensuring mechanical properties and hardness while improving wear resistance.
- no research has been conducted on corrosion in actual coal mine environments.
- Cide patent CN 109825774 B discloses a method for preparing a Bema multi-phase wear-resistant steel. It uses a small amount of multiple alloy elements to restrict each other. Its main chemical composition (by mass percentage) is that the alloy is selected according to the following main elements by mass percentage: C: 0.2-0.6%, Mn: 1.5-5.0%, Cr: 0.1-3.0%, Al: 0.1-3.0%, Si: 0.1-3.0%, Mo: 0.1-1.0%, Ni: 0.1-2.0%, Cu: 0.1-1.0%, P: 0-0.2%, S: 0-0.03%, the balance is Fe, and auxiliary elements can be selected from one or several alloy elements B: 0-0.3%, V: 0-1.0wt%, W: 0-1.0wt%, Ti: 0-0.3wt%, Nb: 0-0.3wt%, Re: 0-0.3wt%, Ca: 0-0.3wt%, Sn: 0-0.3wt%.
- the heat treatment method adopts rapid cooling from austenite to BS point, slow cooling and temperature change at medium temperature to obtain the upper and lower bainite structures, and the martensite residual Olympic structure is obtained isothermally in the low temperature range.
- wear-resistant steel composed of multiple composite structures of upper and lower bainite, martensite, and austenite is obtained, which can resist impact and cutting wear in various environments and resist corrosion.
- the patent does not provide a detailed description of its corrosion resistance, so it is believed that it cannot adapt to the high humidity and heat and high mineralization coal mining and transportation environment under low pH environment.
- the object of the present invention is to provide an acid corrosion resistant and wear resistant steel suitable for use in coal mine environments and a preparation method thereof.
- the present invention has conducted an in-depth study on wear and corrosion resistance and the influence of various important factors on corrosion resistance and wear resistance.
- a design using a low-molybdenum-nickel medium-chromium low-carbon alloy is proposed, which uses Cr addition to change the density and stability of the corrosion product film, and can repair it as soon as possible after damage, thereby reducing local corrosion sensitivity; reducing the Mn content, thereby reducing sulfide stress corrosion cracking.
- tempered martensite is used as the matrix to ensure the wear resistance of the material and good resistance to SSCC fracture.
- the wear-resistant NM400 grade steel plate provided by the present invention has a significantly improved service life and can be used for transportation components in high mineralization and low pH environments such as coal mines.
- a kind of acid corrosion resistant wear-resistant steel for coal mining which comprises, by mass percentage: C: 0.14-0.18%, Si: 0.05-1.0%, Mn: 0.10-1.0%, Cr: 3.0-5.0%, P: less than 0.05%, S: less than 0.01%, B 0.0008-0.0020%, and also contains any one or two of Ni: 0.01-1.0%, Mo: 0.01-0.6%, and the rest is composed of Fe and unavoidable impurities.
- the acid corrosion resistant and wear resistant steel further comprises one or at least two of the following chemical components in mass percentage: Nb: 0.05-0.1%, Ti: 0.005-0.1%, V: 0.005-0.1%.
- the yield strength of the acid corrosion resistant wear-resistant steel plate is ⁇ 1100MPa
- the tensile strength is ⁇ 1300MPa
- the uniform corrosion rate under service in a simulated high mineralization, low pH coal mining and transportation service environment is 0.055-0.07mm/a.
- tempered martensite phase as the main phase (content ⁇ 90%), and the original austenite grain size is above level 8 (GB/T6394-2017).
- the surface hardness is 370 or more in terms of Brinell hardness HBW10/3000.
- the present invention can easily and stably manufacture corrosion-resistant and wear-resistant steel plates having excellent corrosion-resistant and wear-resistant properties, especially in high mineralization, low pH, and coal ore mining and transportation environments.
- C 0.10-0.20%.
- C is an important element for improving hardness and wear resistance. As the C content increases, the hardness and wear resistance of the material increase, but the plasticity, toughness and weldability decrease. When the carbon content of C is less than 0.10%, the hardness is not improved enough. Comprehensively considering the C content is 0.10-0.2%, preferably 0.14-0.18%.
- Mn is a strengthening element in steel and an essential element for steelmaking and deoxidation.
- Mn can refine the microstructure of the steel plate described in the present invention, and can also inhibit the formation of network cementite, which is more beneficial to the improvement of the toughness of the steel type involved in the present invention.
- mass percentage of Mn exceeds the upper limit specified by the present invention, it is easy to cause temper brittleness, central segregation, and further deteriorate the matrix structure, and form larger MnS inclusions, thereby deteriorating the weldability and corrosion resistance of the steel plate involved in the present invention.
- the mass percentage of Mn in the highly corrosion-resistant and weathering steel is controlled at 0.1 to 1.0%, preferably 0.2 to 0.4%.
- Cr is an important element of the steel plate described in the present invention.
- the addition of Cr can improve the hardenability of steel, and is beneficial to the solid solution strengthening of steel, refine the structure and thus improve impact toughness.
- the Cr content within the range of steel types involved in the present invention can effectively increase the self-corrosion potential of steel and inhibit the occurrence of corrosion.
- Cr can promote the formation of a dense oxide film on the surface, making the ⁇ -FeOOH rust layer cationic selective, allowing Cl- and SO42- to penetrate into the matrix, thereby improving the passivation ability of steel.
- the Cr content is set to 3-5%. If the Cr content is When it exceeds 5%, the weldability of the material is reduced and the manufacturing cost increases. It is preferably within the range of 3.5 to 4.5%.
- Mo 0.01-0.6%.
- Mo improves toughness by refining the martensite phase.
- Mo addition can improve the alloying effect of Cr, dissolve Cr in the matrix, reduce the precipitation of Cr carbides, and thus reduce the corrosion rate.
- the Mo content is limited to 0.01-0.6%, preferably 0.01-0.3%.
- Ni 0.01-1.0%. Ni is beneficial to improving the toughness of steel, but it will cause the SSCC corrosion resistance of steel to deteriorate. Considering the manufacturing cost, the Ni content is not more than 1%.
- B 0.0008-0.0020%.
- a small content of B can improve the hardenability of the material and can improve the SSCC resistance of the steel.
- the preferred range is 0.0008-0.0020%.
- P 0.01% or less.
- P is a harmful impurity element in the steel of the present invention. Especially during the solidification process, it is easy to segregate in the center of the ingot, resulting in P enrichment, which becomes a source of H aggregation, resulting in reduced HIC and SCC resistance. At the same time, P is easy to cause temper brittleness and deteriorate welding performance. Therefore, it is necessary to strictly control the P content, preferably 0.005 or less.
- S 0.01% or less.
- S needs to be strictly controlled in the steel of the present invention. When S is less than 0.003%, HIC sensitivity can be significantly reduced. When the S content is high, MnS is easily formed, which leads to pitting corrosion and significantly increases HIC sensitivity. At the same time, an increase in S content will reduce weldability and toughness. Therefore, the S content needs to be reduced as much as possible, but it should be noted that excessive reduction in S content will lead to increased refining costs, so the S content is preferably above 0.002%.
- the above components are the basic components of the present invention.
- the present invention may selectively contain one or more selected from Nb: 0.01-0.020%, V: 0.01-0.05%, and Ti: 0.005-0.05%.
- Nb, V, and Ti can precipitate in the form of carbonitrides or nitrides, which is beneficial to refine the structure and thus improve toughness.
- the content of each added element is limited to Nb: 0.01-0.020%, V: 0.01-0.05%, and Ti: 0.005-0.05%.
- the present invention also provides a method for preparing acid corrosion-resistant wear-resistant steel for coal mining, wherein the NM400 grade wear-resistant steel has the above chemical composition, and the preparation method adopted is as follows:
- Alloy selection select the alloy according to the mass percentage of the chemical composition of the acid corrosion resistant and wear resistant steel
- Converter smelting and refining According to the chemical composition requirements of the acid corrosion resistant wear-resistant steel, low-sulfur hot metal (sulfur content ⁇ 0.015%) converter smelting is used, and alloying is carried out according to the medium limit control of alloy composition through ferrosilicon, medium carbon ferrochrome, etc.
- the full name of converter smelting is argon blowing, and the final slag basicity is controlled within the range of 3.0 to 3.5.
- Converter smelting ensures one-time carbon pulling, and the slag is added 3 minutes before the end point.
- the LF refining time is not less than 40 minutes, and the bottom argon is blown and stirred throughout the process. Calcium carbide, aluminum slag or aluminum particles are used for deoxidation, and the B, Ti, and Al components are adjusted and met through wire feeding.
- a continuous casting machine is used to cast the billet at a speed of 1.1-1.4m/min.
- the mold protection slag uses peritectic steel protection slag.
- the end of the billet is gently pressed down.
- the billet is slowly cooled for more than 48 hours after it comes off the line, and the surface is checked and cleaned.
- the thickness of the billet is 200-300mm.
- the ingot is heated and kept at 1170-1250°C, rolled using high reduction technology, quenched offline and tempered at low temperature after rolling; and descaled through upper and lower headers before rough rolling.
- the rolled steel billet is subjected to online/offline quenching and low temperature tempering after rolling.
- a two-stage rolling method of slow high-pressure rough rolling and finishing rolling is adopted.
- the rolling force is reduced by high-temperature rolling, and the steel plate structure is fully refined by high-pressure technology, thereby improving the mechanical properties of the steel plate.
- the rough rolling deformation rate is ⁇ 65%
- the finishing deformation rate is ⁇ 60%.
- the finishing rolling temperature is controlled at 840-870°C.
- the slow large reduction technology as a preferred mode is: rolling at 1170-1250°C (for example, 1190°C, 1200°C, 1210°C, 1230°C, 1250°C), the total reduction rate is 80-90% (for example, 84%, 86%, 88%, 90%), the strain rate is 0.2-2.0s -1 , and the intermediate billet/finished product thickness is between 2.5 and 4.0.
- the intermediate billet thickness is controlled within ⁇ 3mm.
- the finishing rolling start temperature is 960-1000°C
- the finishing rolling final rolling temperature is 840-870°C
- the finishing rolling start temperature is controlled within ⁇ 15°C.
- the slab is heated and soaked in two stages, wherein the soaking time is ⁇ 40 min, preferably the temperature range of the first heating stage is 1050-1180°C, the second heating stage is 1180-1280°C, and the soaking stage is 1170-1250°C.
- the heating rate is ⁇ 9-10 min/cm.
- online quenching or offline quenching can be performed immediately after rolling as needed, and subsequent low-temperature tempering heat treatment is performed after quenching.
- online quenching is recommended to shorten the process. process, saving energy.
- quenching refers to heating the rolled steel to 900-920°C, keeping the temperature for 10-15 minutes to austenitize, and then water-cooling to room temperature to obtain a microstructure with martensite as the main phase, thereby obtaining a higher hardness;
- the tempering treatment is to heat the steel obtained after quenching to 200-220°C, keep it warm for 10-15 minutes, and then air-cool it to room temperature to obtain tempered martensite, improve toughness to a certain extent, and improve resistance to SSCC and HIC.
- the thickness of the steel billet is 200-300 mm.
- the selection of the steel billet specifications is determined according to the rolling mill performance and the reduction amount. As long as the smelting, continuous casting and rolling conditions are met, the preparation method of the present invention can be used for the rolling production of NM400 grade acid corrosion resistant wear-resistant steel plates.
- the wear-resistant steel is a plate with a thickness of 8-40 mm.
- the yield strength of the acid corrosion-resistant wear-resistant steel is ⁇ 1100MPa, and the tensile strength is ⁇ 1300MPa.
- the uniform corrosion rate when serving in the acid mine environment of typical coal mining is 0.055-0.070mm/a, and the corrosion and wear resistance is improved by at least 1.57 times compared with ordinary NM400 grade wear-resistant steel.
- the present invention manufactures a steel material having mechanical properties and wear and corrosion resistance that can meet the service environment of low pH, high mineralization, and alternating dry and wet coal mining and transportation, which can effectively improve the service life and reliability of wear-resistant steel used in acidic coal mining. Its preparation method based on the existing production process makes it feasible for mass production.
- the present invention has the following beneficial effects:
- the acid corrosion and wear-resistant steel produced by the low-carbon, medium-Cr and low-Mn design has good mechanical properties, wear resistance and corrosion resistance, which can effectively reduce the loss of steel caused by corrosion and wear, improve the reliability and service life of steel, and is suitable for service in the highly acidic coal mining and transportation environment.
- the acid corrosion resistant and wear resistant steel manufactured by the present invention is a preparation method based on the optimization of the existing production process, which has good cost advantages and feasibility of large-scale production.
- FIG. 1 is a metallographic structure ( FIG. 1 a ) and grain size ( FIG. 1 b ) of a 20 mm thick acid corrosion resistant and wear resistant steel prepared in Example 1 of the present invention;
- FIG2 is a macroscopic ( FIG2a ) and microscopic morphology ( FIG2b ) of the 20 mm thick acid corrosion resistant and wear resistant steel prepared in Example 1 of the present invention after 720 hours of simulated mine water corrosion;
- FIG3 is a macroscopic ( FIG3a ) and microscopic morphology ( FIG3b ) of conventional NM400 grade wear-resistant steel after 720 hours of simulated mine water corrosion;
- FIG4 is a microscopic morphology of the acid corrosion resistant wear-resistant steel ( FIG4a ) and conventional NM400 grade wear-resistant steel prepared in Example 1 of the present invention after impact wear and corrosion in simulated mine water mixed with coal ore ( FIG4b );
- FIG. 5 is a microscopic morphology of the acid corrosion-resistant wear-resistant steel ( FIG. 5 a ) and conventional NM400 grade wear-resistant steel prepared in Example 1 of the present invention after being subjected to simulated mine water mixed coal ore dry-wet alternating impact wear corrosion ( FIG. 5 b ).
- the acid corrosion-resistant wear-resistant steel plate and its preparation method for coal mining provided in this embodiment adopts a 4300mm double-roller rolling mill to produce wear-resistant steel with a finished thickness of 20mm.
- the specific element composition is shown in Table 1, and the remainder is Fe and unavoidable impurities.
- a slab with a cross section of 200 mm is formed through smelting, refining and continuous casting; wherein the smelting end point temperature is controlled at 1640-1680°C.
- the cold billet is rolled using slow and large reduction technology to produce a steel plate with a thickness of 20 mm, with a total reduction rate of 90%.
- the rolled steel is heated to 900°C, kept at this temperature for 15 minutes for austenitization, and then quenched to room temperature to obtain a martensite-based microstructure with a higher hardness.
- the quenched steel plate is heated to 220°C, kept at this temperature for 20 minutes, and then air-cooled to room temperature to obtain a tempered martensite microstructure.
- conventional NM400 wear-resistant steel has no clear requirements for corrosion resistance.
- conventional NM400 wear-resistant steel is used as a comparison, and the corrosion environment is a corrosion test conducted in accordance with GB/T19746-2005 in a simulated acidic coal mine water environment.
- the composition of conventional NM400 steel is: C: 0.24%, Si: 0.39%, Mn: 1.15%, P: 0.007%, S: 0.0001%, Mo: 0.12%, Ti: 0.015%, V: 0.25%, B: 0.001%, and the remainder is Fe and other unavoidable impurities.
- the corrosion rate of conventional NM400 wear-resistant steel is 0.106mm/a.
- the corrosion resistance of the coal obtained in this embodiment using acid corrosion resistant wear-resistant steel is increased by 1.93 times.
- the acid corrosion-resistant wear-resistant steel plate and its preparation method for coal mining provided in this embodiment adopts a 4300mm double-stand rolling mill to produce wear-resistant steel with a thickness of 40mm.
- the specific element composition is shown in Table 5, and the remainder is Fe and unavoidable impurities.
- a slab with a cross section of 250 mm is formed through smelting, refining and continuous casting; wherein the smelting end point temperature is controlled at 1640-1670°C.
- the cold billet is rolled using slow and large reduction technology to produce a steel plate with a thickness of 40 mm, with a total reduction rate of 84%.
- the rolled steel was heated to 900°C, kept at this temperature for 15 minutes for austenitization, and then quenched to room temperature to obtain a martensite-based microstructure.
- the quenched steel plate was heated to 220°C, kept at this temperature for 20 minutes, and then air-cooled to room temperature to obtain a tempered martensite microstructure.
- Table 7 is the uniform corrosion test parameters of acid corrosion resistant wear-resistant steel obtained in Example 2 (refer to GB/T19746-2005)
- Example 2 After testing, the corrosion rate of Example 2 is 0.057 mm/a. Compared with conventional NM400 grade wear-resistant steel, the corrosion resistance of the acid corrosion-resistant wear-resistant steel obtained in Example 2 is improved by 1.57 times.
- Figure 1 is the microstructure of acid corrosion resistant wear-resistant steel used in coal mines in Example 1.
- Figure 2 is the macroscopic and microscopic morphology of the coal after corrosion using acid corrosion resistant NM400 grade wear-resistant steel in Example 1.
- Figure 3 is a macroscopic ( Figure 3a) and microscopic morphology (Figure 3b) of conventional NM400 grade wear-resistant steel after 720 hours of simulated mine water corrosion.
- Figure 4 is a microscopic morphology (Figure 4b) of the acid corrosion resistant wear-resistant steel ( Figure 4a) and conventional NM400 grade wear-resistant steel prepared in Example 1 of the present invention after impact wear corrosion by simulated mine water mixed coal ore.
- Figure 5 is a microscopic morphology (Figure 5b) of the acid corrosion resistant wear-resistant steel ( Figure 5a) and conventional NM400 grade wear-resistant steel prepared in Example 1 of the present invention after dry-wet alternating impact wear corrosion by simulated mine water mixed coal ore.
- the process parameters (such as temperature, time, etc.) of the present invention can realize the method by taking upper and lower limits and interval values, and the embodiments are not listed one by one here.
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Abstract
Disclosed in the present invention are acid-corrosion-resistant wear-resistant steel for coal mining and transportation and a preparation method therefor. The wear-resistant steel comprises, in percentages by weight, C: 0.10-0.20%, Si: 0.05-1.0%, Mn: 0.10-1.0%, Cr: 3.0-5.0%, P: 0.05% or less, S: 0.01% or less, and B: 0.0008-0.0020%, and also comprises any one or two of Ni: 0.01-10% and Mo: 0.01-0.6%, with the balance being Fe and inevitable impurities. The preparation method comprises: 1) alloy selection; 2) converter smelting and refining; 3) continuous casting and rolling; and 4) quenching and low-temperature tempering heat treatment. The acid-corrosion-resistant wear-resistant steel of the present invention has a yield strength greater than or equal to 1100 MPa and a tensile strength greater than or equal to 1300 MPa, and has a uniform corrosion rate of 0.055-0.070 mm/a in a simulated high-salinity low-pH coal mining and transportation service environment; and compared with common NM400-grade wear-resistant steel, the corrosion resistance and wear resistance thereof are improved by at least 1.57 times.
Description
相关申请Related Applications
本申请要求名称为“一种煤矿采运用耐酸性腐蚀耐磨钢及其制备方法”、于2023年3月31日提交的中国专利申请2023103368283的优先权，在此通过引用包括该件申请。This application claims priority to Chinese patent application 2023103368283, entitled “A kind of acid-corrosion-resistant and wear-resistant steel for coal mining and preparation method thereof”, filed on March 31, 2023, which is hereby included by reference.
本发明属于合金钢材料技术领域，尤其涉及一种用于煤矿采运用耐酸性腐蚀耐磨钢板及其制备方法。本发明的耐磨蚀钢特别适用于在低pH环境、高矿化度煤矿采运用耐磨损关键部件。The present invention belongs to the technical field of alloy steel materials, and in particular relates to an acid corrosion resistant wear-resistant steel plate for coal mining and a preparation method thereof. The wear-resistant steel of the present invention is particularly suitable for wear-resistant key components in low pH environment and high mineralization coal mining.
耐磨钢广泛应用于矿山机械、煤炭采运、建材机械、铁路运输等易磨损关键部件，以满足恶劣工况下大型装备的使用要求。其中，我国煤炭采运消耗的耐磨钢板高达30万吨/年。目前针对采运设备磨损情况，我国研制多种新型耐磨钢材料，中高锰奥氏体系列耐磨钢利用在较大冲击载荷或接触应力作用下的表面应变诱发马氏体相变使得表面硬度急剧升高，从而提高耐磨性。但由于中高锰钢屈服强度不高，在较大作用力下易发生变形甚至开裂，难以达到预期寿命；具有易加工、可焊性的中、低合金耐磨钢以马氏体或者贝氏体组织为主，相对于传统耐磨铸钢具有较高的强韧性、硬度和一定韧性，其生产工艺较为简单，综合经济性合理，得到了广泛的生产和应用。其中，400NM级别耐磨钢应用广泛，生产制造厂家较多。Wear-resistant steel is widely used in key wear-resistant parts such as mining machinery, coal mining and transportation, building materials machinery, and railway transportation to meet the use requirements of large equipment under harsh working conditions. Among them, my country's coal mining and transportation consumes up to 300,000 tons of wear-resistant steel plates per year. At present, in response to the wear of mining and transportation equipment, my country has developed a variety of new wear-resistant steel materials. The medium-high manganese austenite series wear-resistant steel uses the surface strain under large impact loads or contact stress to induce martensitic phase transformation, which makes the surface hardness increase sharply, thereby improving wear resistance. However, due to the low yield strength of medium-high manganese steel, it is easy to deform or even crack under large forces, and it is difficult to achieve the expected life; medium and low alloy wear-resistant steel with easy processing and weldability is mainly martensite or bainite structure. Compared with traditional wear-resistant cast steel, it has higher strength, hardness and certain toughness. Its production process is relatively simple, and the comprehensive economy is reasonable, and it has been widely produced and applied. Among them, 400NM grade wear-resistant steel is widely used, and there are many manufacturers.
煤炭采运过程中，煤层、围岩中的硫化矿物与氧气和水接触，在微生物的催化作用下，经过一系列复杂的地球化学反应，能够产生酸性矿井水，同时酸性水可能发生脱硫酸作用产生H2S。因此，煤矿采运用刮板、中板等耐磨板处于高湿热、高酸度、高矿化度的环境介质中，除了承受运煤机的运行负荷，推、拉的应力，还要承受大块煤、岩石的挤压、冲击，以及在干湿交替环境中介质腐蚀(煤矿水中含有HCO3
-、SO4
2-、Cl-、S2-与HS-等离子)的多重耦合作用，现有耐磨钢板磨损腐蚀严重。因此，开发耐酸性腐蚀环境耐磨合金材料是保证
服役寿命和安全性的有效途径。During the coal mining process, the sulfide minerals in the coal seams and surrounding rocks come into contact with oxygen and water. Under the catalytic action of microorganisms, a series of complex geochemical reactions can produce acidic mine water. At the same time, the acidic water may undergo desulfurization to produce H2S . Therefore, the scrapers, middle plates and other wear-resistant plates used in coal mining are in an environment with high humidity, heat, acidity and mineralization. In addition to bearing the operating load of the coal transporter and the stress of pushing and pulling, they must also withstand the squeezing and impact of large pieces of coal and rock, as well as the multiple coupling effects of medium corrosion in a dry-wet alternating environment (coal mine water contains HCO3- , SO42- , Cl- , S2- and HS - plasmas). Existing wear-resistant steel plates are severely corroded. Therefore, the development of wear-resistant alloy materials resistant to acidic corrosion environments is a key guarantee. An effective way to ensure service life and safety.
针对这样的要求，中国发明专利CN104662193 A公开了一种“低温韧性和腐蚀磨损性能优异的耐磨损钢板”。其化学成分(按质量百分比计)为：C：0.10～0.20％、Si：0.05～1.00％、Mn：0.1～2.0％、P:0.020％以下、S:0.005％以下、Al:0.005～0.100％,进一步含有选自Cr：0.05～2.0％、Mo：0.05～1.0％中的1种或2中。它利用控制钢中固溶Cr和Mo含量(0.05wt.％≤(Cr+2.5Mo)≤2.0wt.％)，结合轧制及热处理工艺，获得具有马氏体相为主相且原始奥氏体晶粒≤30μm的组织，表面硬度HBW10/3000≥360，从而达到提高耐腐蚀磨损的目的。但其主要适用于处于湿润状态的土和砂子含有腐蚀性物质环境，与高酸度和矿化度的煤矿环境不同，且磨损腐蚀机理也不相同。In response to such requirements, Chinese invention patent CN104662193 A discloses a "wear-resistant steel plate with excellent low-temperature toughness and corrosion and wear performance". Its chemical composition (by mass percentage) is: C: 0.10-0.20%, Si: 0.05-1.00%, Mn: 0.1-2.0%, P: less than 0.020%, S: less than 0.005%, Al: 0.005-0.100%, and further contains 1 or 2 selected from Cr: 0.05-2.0%, Mo: 0.05-1.0%. It controls the solid solution Cr and Mo content in the steel (0.05wt.%≤(Cr+2.5Mo)≤2.0wt.%), combined with rolling and heat treatment processes, to obtain a structure with martensite as the main phase and original austenite grains ≤30μm, and a surface hardness of HBW10/3000≥360, thereby achieving the purpose of improving corrosion and wear resistance. However, it is mainly suitable for environments where the soil and sand are in a wet state and contain corrosive substances, which is different from the coal mine environment with high acidity and mineralization, and the wear and corrosion mechanism is also different.
文献“含锑低合金马氏体钢的耐磨蚀性能”研究了Sb元素添加对具有如下组成的低合金马氏体钢耐磨蚀性能的影响。上述钢以质量百分比及含有C：0.16-0.18％，并含有适量的Si、Mn、Al、Ti、Mo、B，还含有Cr1.5％～1.8％、Cu：0.5～0.6％及Sb0％和0.2％。分别通过热轧后在Ar3相变点以上温度淬火和低温回火处理，得到HRC＞40的耐磨钢，且发现Sb元素的加入提高了钢在酸性高氯离子及高硫酸根离子环境中的耐蚀性，保证力学性能与硬度的同时提高了耐磨蚀性能。但是对于实际煤矿环境中的腐蚀未进行研究。The document "Abrasion resistance of low alloy martensitic steel containing antimony" studied the effect of Sb addition on the wear resistance of low alloy martensitic steel with the following composition. The above steel contains C: 0.16-0.18% by mass percentage, and contains appropriate amounts of Si, Mn, Al, Ti, Mo, B, Cr1.5%~1.8%, Cu: 0.5~0.6% and Sb0% and 0.2%. After hot rolling, quenching at a temperature above the Ar 3 phase transformation point and low temperature tempering treatment were performed to obtain wear-resistant steel with HRC>40, and it was found that the addition of Sb element improved the corrosion resistance of steel in acidic high chloride ion and high sulfate ion environment, ensuring mechanical properties and hardness while improving wear resistance. However, no research has been conducted on corrosion in actual coal mine environments.
另外，针对耐磨蚀钢的开发，中国发明专利CN 113025888 B公开了“一种耐磨蚀性高强钢及其制备方法”的耐磨蚀性高强钢。其化学成分(按质量百分比计)为：C 0.12～0.16％，Si 0.45～0.55％，Mn 4.50～5.50％，P≤0.008％，S≤0.0008％，Alt 0.01～0.05％，余量为铁和不可避免的杂质。通过两阶段轧制工艺抑制碳化物析出，实现晶粒细化；结合特定的加热冷却工艺获得细小无碳化物板条马氏体，从而获得高强韧、低屈强、高耐磨蚀高强钢。但其主要应用于砂石、淤泥、鹅卵石等环境工况，与低pH环境下的磨蚀环境不同，耐磨蚀机理不同。In addition, for the development of wear-resistant steel, Chinese invention patent CN 113025888 B discloses "a wear-resistant high-strength steel and its preparation method". Its chemical composition (by mass percentage) is: C 0.12-0.16%, Si 0.45-0.55%, Mn 4.50-5.50%, P≤0.008%, S≤0.0008%, Alt 0.01-0.05%, and the balance is iron and inevitable impurities. The precipitation of carbides is suppressed by a two-stage rolling process to achieve grain refinement; combined with a specific heating and cooling process, fine carbide-free lath martensite is obtained, thereby obtaining high-strength steel with high toughness, low yield strength and high wear resistance. However, it is mainly used in environmental conditions such as sand, gravel, silt, and pebbles, which is different from the abrasive environment under low pH environment and has a different wear resistance mechanism.
中国发明专利CN 109825774 B公开了“一种贝马复相耐磨蚀钢的制备方法”。它采用多合金元素少添加量相互制约，其主要化学成分(按质量百分比计)为，按以下主要元素质量百分比选择合金：C：0.2-0.6％、Mn：1.5-5.0％、Cr：0.1-3.0％、Al：0.1-3.0％、Si：0.1-3.0％、Mo：0.1-1.0％、Ni：0.1-2.0％、Cu：
0.1-1.0％、P：0-0.2％、S：0-0.03％、余量为Fe，辅助元素可以选择一种或几种合金元素B：0-0.3％、V：0-1.0wt％、W：0-1.0wt％、Ti：0-0.3wt％、Nb：0-0.3wt％、Re：0-0.3wt％、Ca：0-0.3wt％、Sn：0-0.3wt％。通过启用上贝氏体组织加宽获取组织范围，热处理方式奥氏体到BS点采用快冷，中温采用慢冷变温获取上下贝氏体组织，低温范围内等温获马氏体残奥组织，通过连续生产获取上下贝氏体马氏体奥氏体多项复合组织组成的耐磨钢，即抗击多种环境下的冲击和切削磨损又抗击腐蚀。但该专利未就其耐蚀性能做详细说明，故认为其无法适应低pH环境下高湿热、高矿化物的煤矿采运环境。Chinese invention patent CN 109825774 B discloses a method for preparing a Bema multi-phase wear-resistant steel. It uses a small amount of multiple alloy elements to restrict each other. Its main chemical composition (by mass percentage) is that the alloy is selected according to the following main elements by mass percentage: C: 0.2-0.6%, Mn: 1.5-5.0%, Cr: 0.1-3.0%, Al: 0.1-3.0%, Si: 0.1-3.0%, Mo: 0.1-1.0%, Ni: 0.1-2.0%, Cu: 0.1-1.0%, P: 0-0.2%, S: 0-0.03%, the balance is Fe, and auxiliary elements can be selected from one or several alloy elements B: 0-0.3%, V: 0-1.0wt%, W: 0-1.0wt%, Ti: 0-0.3wt%, Nb: 0-0.3wt%, Re: 0-0.3wt%, Ca: 0-0.3wt%, Sn: 0-0.3wt%. By enabling the upper bainite structure to widen the range of tissues, the heat treatment method adopts rapid cooling from austenite to BS point, slow cooling and temperature change at medium temperature to obtain the upper and lower bainite structures, and the martensite residual Olympic structure is obtained isothermally in the low temperature range. Through continuous production, wear-resistant steel composed of multiple composite structures of upper and lower bainite, martensite, and austenite is obtained, which can resist impact and cutting wear in various environments and resist corrosion. However, the patent does not provide a detailed description of its corrosion resistance, so it is believed that it cannot adapt to the high humidity and heat and high mineralization coal mining and transportation environment under low pH environment.
发明内容Summary of the invention
鉴于上述问题，本发明的目的在于提供一种适用于煤矿环境下耐酸性腐蚀耐磨钢及其制备方法。In view of the above problems, the object of the present invention is to provide an acid corrosion resistant and wear resistant steel suitable for use in coal mine environments and a preparation method thereof.
为了解决上述问题，本发明对耐磨损腐蚀及各重要因素对耐腐蚀、耐磨损性的影响进行了深入研究。提出一种采用少钼镍中铬低碳合金设计，利用Cr添加改变腐蚀产物膜的致密性和稳定性，且在破坏后能尽快修复，降低局部腐蚀敏感性；降低Mn含量，从而减少硫化物应力腐蚀开裂。同时以回火马氏体为基体，保证材料的耐磨性以及良好的抗SSCC断裂能力。本发明提供的耐磨蚀性NM400级钢板具有显著提高的服役寿命，可适用于煤矿等高矿化度、低pH环境输送构件。In order to solve the above problems, the present invention has conducted an in-depth study on wear and corrosion resistance and the influence of various important factors on corrosion resistance and wear resistance. A design using a low-molybdenum-nickel medium-chromium low-carbon alloy is proposed, which uses Cr addition to change the density and stability of the corrosion product film, and can repair it as soon as possible after damage, thereby reducing local corrosion sensitivity; reducing the Mn content, thereby reducing sulfide stress corrosion cracking. At the same time, tempered martensite is used as the matrix to ensure the wear resistance of the material and good resistance to SSCC fracture. The wear-resistant NM400 grade steel plate provided by the present invention has a significantly improved service life and can be used for transportation components in high mineralization and low pH environments such as coal mines.
为达到上述目的，本发明采用了如下的技术方案：In order to achieve the above object, the present invention adopts the following technical solutions:
一种煤矿采运用耐酸性腐蚀耐磨钢，按质量百分比计，所述耐酸性腐蚀耐磨钢包含：C：0.14～0.18％、Si：0.05～1.0％、Mn：0.10～1.0％、Cr:3.0～5.0％、P:0.05％以下、S：0.01％以下、B 0.0008～0.0020％，还含有Ni:0.01～1.0％、Mo:0.01～0.6％中的任意一种或两种，剩余部分由Fe和不可避免杂质构成。A kind of acid corrosion resistant wear-resistant steel for coal mining, which comprises, by mass percentage: C: 0.14-0.18%, Si: 0.05-1.0%, Mn: 0.10-1.0%, Cr: 3.0-5.0%, P: less than 0.05%, S: less than 0.01%, B 0.0008-0.0020%, and also contains any one or two of Ni: 0.01-1.0%, Mo: 0.01-0.6%, and the rest is composed of Fe and unavoidable impurities.
进一步优选地，所述耐酸性腐蚀耐磨钢还包括以下质量百分数的化学成分：Nb：0.05～0.1％、Ti：0.005～0.1％、V：0.005～0.1％中的1种或至少2种。Further preferably, the acid corrosion resistant and wear resistant steel further comprises one or at least two of the following chemical components in mass percentage: Nb: 0.05-0.1%, Ti: 0.005-0.1%, V: 0.005-0.1%.
本发明中，所述耐酸性腐蚀耐磨钢板的屈服强度≥1100MPa，抗拉强度≥1300MPa，在模拟高矿化度、低pH煤矿采运服役环境服役下的均匀腐蚀速率为0.055～0.07mm/a。
In the present invention, the yield strength of the acid corrosion resistant wear-resistant steel plate is ≥1100MPa, the tensile strength is ≥1300MPa, and the uniform corrosion rate under service in a simulated high mineralization, low pH coal mining and transportation service environment is 0.055-0.07mm/a.
并且，具有以回火马氏体相为主相(含量≥90％)，且原奥氏体晶粒度在8级以上(GB/T6394-2017)。Moreover, it has a tempered martensite phase as the main phase (content ≥ 90%), and the original austenite grain size is above level 8 (GB/T6394-2017).
并且，表面硬度以布氏硬度HBW10/3000记为370以上。Furthermore, the surface hardness is 370 or more in terms of Brinell hardness HBW10/3000.
本发明能够容易且稳定的制造尤其在高矿化度、低pH、煤矿石采运环境下的耐腐蚀磨损性能优异的耐腐蚀磨损钢板。The present invention can easily and stably manufacture corrosion-resistant and wear-resistant steel plates having excellent corrosion-resistant and wear-resistant properties, especially in high mineralization, low pH, and coal ore mining and transportation environments.
首先，对本发明的耐酸性腐蚀耐磨钢板的组成限定理由进行说明。在没有特殊说明的情况下，质量百分比简单计为％。First, the reasons for limiting the composition of the acid corrosion resistant wear-resistant steel plate of the present invention are described. Unless otherwise specified, mass percentage is simply expressed as %.
C：0.10～0.20％，C是对提高硬度和耐磨性的重要元素，随着C含量增加，材料硬度和耐磨性提高，但塑韧性和可焊性降低。当C的含碳量低于0.10％时硬度提升不足。综合考虑C含量为0.10～0.2％，优选0.14～0.18％。C: 0.10-0.20%. C is an important element for improving hardness and wear resistance. As the C content increases, the hardness and wear resistance of the material increase, but the plasticity, toughness and weldability decrease. When the carbon content of C is less than 0.10%, the hardness is not improved enough. Comprehensively considering the C content is 0.10-0.2%, preferably 0.14-0.18%.
Si：0.05～1.0％，Si固溶与铁素体和奥氏体中，起固溶强化作用从而提高材料硬度和强度。但Si含量过高则易降低韧性，淬火时易产生淬火裂纹。另外，Si作为钢液脱氧剂元素，其含量应在0.05％以上以保证充分的脱氧效果。因此，Si含量限定在0.05～1.0范围，其中，优选为0.2～0.5％。Si: 0.05-1.0%. Si is dissolved in ferrite and austenite, playing a role of solid solution strengthening, thereby improving the hardness and strength of the material. However, if the Si content is too high, it is easy to reduce the toughness and easily produce quenching cracks during quenching. In addition, Si, as a deoxidizer element in molten steel, its content should be above 0.05% to ensure sufficient deoxidation effect. Therefore, the Si content is limited to the range of 0.05-1.0, among which 0.2-0.5% is preferred.
Mn：对于本发明所述的耐酸性腐蚀耐磨钢板而言，Mn是钢中的强化元素，也是炼钢脱氧的必要元素。此外，Mn可以细化本发明所述的钢板显微组织，还可以起到抑制网状渗碳体的形成的作用，从而对本发明所涉及的钢种的韧性的提高较为有利。然而，另一方面，当Mn的质量百分比超过本发明所限定的上限时，则易导致回火脆性，导致中心偏析，进而恶化基体组织，并且形成较大的MnS夹杂，从而恶化本发明所涉及钢板可焊性及耐蚀性。此外，Mn含量过高会导致本发明所涉及的钢种产生硫化物应力腐蚀开裂(SSCC)。因此，所述的高耐蚀耐候钢中将Mn的质量百分比控制在0.1～1.0％，优选0.2～0.4％。Mn: For the acid corrosion resistant and wear-resistant steel plate described in the present invention, Mn is a strengthening element in steel and an essential element for steelmaking and deoxidation. In addition, Mn can refine the microstructure of the steel plate described in the present invention, and can also inhibit the formation of network cementite, which is more beneficial to the improvement of the toughness of the steel type involved in the present invention. However, on the other hand, when the mass percentage of Mn exceeds the upper limit specified by the present invention, it is easy to cause temper brittleness, central segregation, and further deteriorate the matrix structure, and form larger MnS inclusions, thereby deteriorating the weldability and corrosion resistance of the steel plate involved in the present invention. In addition, too high a Mn content will cause sulfide stress corrosion cracking (SSCC) to occur in the steel type involved in the present invention. Therefore, the mass percentage of Mn in the highly corrosion-resistant and weathering steel is controlled at 0.1 to 1.0%, preferably 0.2 to 0.4%.
Cr：Cr是本发明所述钢板的重要元素。通过Cr添加提高钢的淬透性，且有利于钢的固溶强化，细化组织从而提高冲击韧性。此外，在干湿交替环境下的煤矿石等的接触成为腐蚀磨损环境下，Cr的含量在本发明所涉及的钢种范围内可以有效提高钢的自腐蚀电位，抑制腐蚀的发生，同时Cr可以促进表面形成致密氧化膜，使α-FeOOH锈层具有阳离子选择性，Cl-、SO4
2-向基体渗透，提高钢的钝化能力；为了达到这样的效果，Cr的含量设为3～5％，如果Cr含量
超过5％时，降低材料焊接性且制造成本增加。应予说明，优选为3.5～4.5％的范围。Cr: Cr is an important element of the steel plate described in the present invention. The addition of Cr can improve the hardenability of steel, and is beneficial to the solid solution strengthening of steel, refine the structure and thus improve impact toughness. In addition, in the contact with coal ore and the like in a dry-wet alternating environment, which becomes a corrosive wear environment, the Cr content within the range of steel types involved in the present invention can effectively increase the self-corrosion potential of steel and inhibit the occurrence of corrosion. At the same time, Cr can promote the formation of a dense oxide film on the surface, making the α-FeOOH rust layer cationic selective, allowing Cl- and SO42- to penetrate into the matrix, thereby improving the passivation ability of steel. In order to achieve such an effect, the Cr content is set to 3-5%. If the Cr content is When it exceeds 5%, the weldability of the material is reduced and the manufacturing cost increases. It is preferably within the range of 3.5 to 4.5%.
Mo:0.01～0.6％，Mo通过马氏体相细化从而提高韧性。同时，Mo添加可以提高Cr的合金化效果，将Cr固溶在基体内，减少Cr的碳化物析出，从而降低腐蚀速率。另外，考虑低pH值和活化状态下Mo降低腐蚀速率作用及制造成本，Mo含量限定在0.01～0.6％，优选0.01～0.3％。Mo: 0.01-0.6%. Mo improves toughness by refining the martensite phase. At the same time, Mo addition can improve the alloying effect of Cr, dissolve Cr in the matrix, reduce the precipitation of Cr carbides, and thus reduce the corrosion rate. In addition, considering the effect of Mo on reducing corrosion rate under low pH value and activation state and manufacturing cost, the Mo content is limited to 0.01-0.6%, preferably 0.01-0.3%.
Ni:0.01～1.0％，Ni有利于提高钢材的韧性，但由于会导致钢的SSCC腐蚀性能变差，同时考虑制造成本，Ni含量不大于1％。Ni: 0.01-1.0%. Ni is beneficial to improving the toughness of steel, but it will cause the SSCC corrosion resistance of steel to deteriorate. Considering the manufacturing cost, the Ni content is not more than 1%.
B:0.0008～0.0020％，B以微小含量即可提高材料淬透性，且能够提高钢的抗SSCC性能，但B含量超过0.003％时易导致韧性和焊接性下降，因此优选0.0008～0.0020％范围。B: 0.0008-0.0020%. A small content of B can improve the hardenability of the material and can improve the SSCC resistance of the steel. However, when the B content exceeds 0.003%, it is easy to cause a decrease in toughness and weldability. Therefore, the preferred range is 0.0008-0.0020%.
P:0.01％以下，P在本发明钢中是有害杂质元素。特别是在凝固过程中，易在铸坯中心偏析导致P富集，从而成为H的聚集源，导致抗HIC和SCC性能降低。同时，P易导致回火脆性，恶化焊接性能。因此，需要严格控制P含量，优选0.005以下。P: 0.01% or less. P is a harmful impurity element in the steel of the present invention. Especially during the solidification process, it is easy to segregate in the center of the ingot, resulting in P enrichment, which becomes a source of H aggregation, resulting in reduced HIC and SCC resistance. At the same time, P is easy to cause temper brittleness and deteriorate welding performance. Therefore, it is necessary to strictly control the P content, preferably 0.005 or less.
S：0.01％以下，S在本发明钢中需要严格控制，当S＜0.003％时，可以显著降低HIC敏感性。而当S含量较多时，易形成MnS，导致点蚀发生，且HIC敏感性明显增加。同时，S含量增加会降低可焊性、韧性。因此S含量需要尽量降低，但应予说明的是过度减少S含量会导致精炼成本增加，因此S含量优选0.002％以上。S: 0.01% or less. S needs to be strictly controlled in the steel of the present invention. When S is less than 0.003%, HIC sensitivity can be significantly reduced. When the S content is high, MnS is easily formed, which leads to pitting corrosion and significantly increases HIC sensitivity. At the same time, an increase in S content will reduce weldability and toughness. Therefore, the S content needs to be reduced as much as possible, but it should be noted that excessive reduction in S content will lead to increased refining costs, so the S content is preferably above 0.002%.
上述成分是本发明的基本成分。本发明在含有上述基本成分的基础上，还可以选择性含有选自Nb：0.01～0.020％、V:0.01～0.05％、Ti:0.005～0.05％中的1种或2种以上。The above components are the basic components of the present invention. In addition to the above basic components, the present invention may selectively contain one or more selected from Nb: 0.01-0.020%, V: 0.01-0.05%, and Ti: 0.005-0.05%.
Nb、V、Ti可以以碳氮化合物或氮化物形式析出，有利于细化组织从而提高韧性。但从焊接性及制造成本考虑，各添加元素含量分别限定Nb：0.01～0.020％、V:0.01～0.05％、Ti:0.005～0.05％范围。Nb, V, and Ti can precipitate in the form of carbonitrides or nitrides, which is beneficial to refine the structure and thus improve toughness. However, considering weldability and manufacturing cost, the content of each added element is limited to Nb: 0.01-0.020%, V: 0.01-0.05%, and Ti: 0.005-0.05%.
本发明还提供了一种煤矿采运用耐酸性腐蚀耐磨钢的制备方法，所述NM400级耐磨蚀钢具有上述化学成分，采用的制备方法如下：The present invention also provides a method for preparing acid corrosion-resistant wear-resistant steel for coal mining, wherein the NM400 grade wear-resistant steel has the above chemical composition, and the preparation method adopted is as follows:
1)合金选择：按照所述耐酸性腐蚀耐磨钢化学成分的质量百分比选择合金；
1) Alloy selection: select the alloy according to the mass percentage of the chemical composition of the acid corrosion resistant and wear resistant steel;
2)转炉冶炼和精炼：按照所述耐酸性腐蚀耐磨钢的化学成分要求，采用低硫铁水(含硫量≤0.015％)转炉冶炼，通过硅铁、中碳铬铁等按照合金成分中限控制进行合金化，转炉冶炼全称吹氩，终渣碱度控制在3.0～3.5范围内，转炉冶炼确保一次拉碳，渣料在终点前3min加完。LF精炼时间不低于40min，全程底吹氩搅拌，采用碳化钙、铝渣或铝粒脱氧，通过喂线调整并达到B、Ti、Al成分要求。2) Converter smelting and refining: According to the chemical composition requirements of the acid corrosion resistant wear-resistant steel, low-sulfur hot metal (sulfur content ≤ 0.015%) converter smelting is used, and alloying is carried out according to the medium limit control of alloy composition through ferrosilicon, medium carbon ferrochrome, etc. The full name of converter smelting is argon blowing, and the final slag basicity is controlled within the range of 3.0 to 3.5. Converter smelting ensures one-time carbon pulling, and the slag is added 3 minutes before the end point. The LF refining time is not less than 40 minutes, and the bottom argon is blown and stirred throughout the process. Calcium carbide, aluminum slag or aluminum particles are used for deoxidation, and the B, Ti, and Al components are adjusted and met through wire feeding.
3)连铸和轧制：3) Continuous casting and rolling:
经冶炼后，采用连铸机在1.1-1.4m/min拉速拉坯，结晶器保护渣采用包晶钢保护渣，铸坯末端采用轻压下，铸坯下线缓冷48h以上，并检查清理表面，所述铸坯厚度为200～300mm。After smelting, a continuous casting machine is used to cast the billet at a speed of 1.1-1.4m/min. The mold protection slag uses peritectic steel protection slag. The end of the billet is gently pressed down. The billet is slowly cooled for more than 48 hours after it comes off the line, and the surface is checked and cleaned. The thickness of the billet is 200-300mm.
将铸坯在1170-1250℃加热保温，采用大压下技术进行轧制，轧后离线淬火并低温回火；在粗轧前通过上下集管除鳞。The ingot is heated and kept at 1170-1250℃, rolled using high reduction technology, quenched offline and tempered at low temperature after rolling; and descaled through upper and lower headers before rough rolling.
4)淬火和低温回火热处理：4) Quenching and low temperature tempering heat treatment:
将轧制得到的钢坯进行轧后在线/离线淬火和低温回火处理The rolled steel billet is subjected to online/offline quenching and low temperature tempering after rolling.
上述制备方法中，为了避免由于轧制出现的心部偏析而导致耐酸性腐蚀耐磨钢板的强韧性，采用慢速大压下粗轧及精轧两阶段轧制方法。通过高温轧制降低轧制力，且利用大压下技术充分细化钢板组织，进而提高钢板力学性能。其中，粗轧变形率≥65％，精轧变形率≥60％。同时，为了保证耐酸性腐蚀耐磨钢板的塑韧性及强度，精轧终轧温度控制在840～870℃。In the above preparation method, in order to avoid the toughness of the acid corrosion resistant wear-resistant steel plate caused by the core segregation during rolling, a two-stage rolling method of slow high-pressure rough rolling and finishing rolling is adopted. The rolling force is reduced by high-temperature rolling, and the steel plate structure is fully refined by high-pressure technology, thereby improving the mechanical properties of the steel plate. Among them, the rough rolling deformation rate is ≥65%, and the finishing deformation rate is ≥60%. At the same time, in order to ensure the plasticity, toughness and strength of the acid corrosion resistant wear-resistant steel plate, the finishing rolling temperature is controlled at 840-870℃.
所述轧制过程中，作为优选方式的慢速大压下技术为：在1170-1250℃开轧(例如1190℃、1200℃、1210℃、1230℃、1250℃)，总压下率为80～90％(例如，84％、86％、88％、90％)，应变速率为0.2～2.0s-1，中间坯/成品厚度在2.5～4.0之间。轧制过程中中间坯厚度控制在±3mm以内。精轧开轧温度在960～1000℃，精轧终轧温度840～870℃，精轧开轧温度控制在±15℃以内。In the rolling process, the slow large reduction technology as a preferred mode is: rolling at 1170-1250℃ (for example, 1190℃, 1200℃, 1210℃, 1230℃, 1250℃), the total reduction rate is 80-90% (for example, 84%, 86%, 88%, 90%), the strain rate is 0.2-2.0s -1 , and the intermediate billet/finished product thickness is between 2.5 and 4.0. During the rolling process, the intermediate billet thickness is controlled within ±3mm. The finishing rolling start temperature is 960-1000℃, the finishing rolling final rolling temperature is 840-870℃, and the finishing rolling start temperature is controlled within ±15℃.
上述轧制过程中，板坯通过两段加热及均热，其中均热时间≥40min，优选加热一段温度区间在1050～1180℃，加热二段1180～1280℃，均热段1170～1250℃。对于厚规格冷坯加热时，加热速度≥9～10min/cm。During the above rolling process, the slab is heated and soaked in two stages, wherein the soaking time is ≥40 min, preferably the temperature range of the first heating stage is 1050-1180°C, the second heating stage is 1180-1280°C, and the soaking stage is 1170-1250°C. When heating thick cold slabs, the heating rate is ≥9-10 min/cm.
上述制备方法中，轧制后可以根据需要进行立即轧后在线淬火或离线淬火，淬火后进行后续的低温回火热处理。作为优选，建议在线淬火以缩短工艺
流程，节约能耗。In the above preparation method, after rolling, online quenching or offline quenching can be performed immediately after rolling as needed, and subsequent low-temperature tempering heat treatment is performed after quenching. As a preferred method, online quenching is recommended to shorten the process. process, saving energy.
上述制备方法中，所述的淬火和低温回火热处理步骤中，淬火是指将轧制得到钢加热至900～920℃，保温10～15min进行奥氏体化，然后水冷至室温，以获得马氏体为主相的组织结构，从而获得较高的硬度；In the above preparation method, in the quenching and low-temperature tempering heat treatment steps, quenching refers to heating the rolled steel to 900-920°C, keeping the temperature for 10-15 minutes to austenitize, and then water-cooling to room temperature to obtain a microstructure with martensite as the main phase, thereby obtaining a higher hardness;
所述回火处理作为一种优选，是将淬火后得到的钢加热至200～220℃，保温10～15min，然后空冷至室温，获得回火马氏体，提高一定的韧性，并且提高抗SSCC和HIC性能。As a preferred embodiment, the tempering treatment is to heat the steel obtained after quenching to 200-220°C, keep it warm for 10-15 minutes, and then air-cool it to room temperature to obtain tempered martensite, improve toughness to a certain extent, and improve resistance to SSCC and HIC.
所述制备方法中，所述钢坯的厚度为200～300mm。制备钢坯规格的选择根据轧机性能及压下量进行确定，只要符合冶炼、连铸和轧制条件要求，均可采用本发明所述的制备方法用于NM400级耐酸性腐蚀耐磨钢板的轧制生产。作为一种优选方式，所述耐磨蚀钢为板材，厚度为8～40mm。In the preparation method, the thickness of the steel billet is 200-300 mm. The selection of the steel billet specifications is determined according to the rolling mill performance and the reduction amount. As long as the smelting, continuous casting and rolling conditions are met, the preparation method of the present invention can be used for the rolling production of NM400 grade acid corrosion resistant wear-resistant steel plates. As a preferred embodiment, the wear-resistant steel is a plate with a thickness of 8-40 mm.
本发明未详细说明的内容均可采用本领域的常规技术知识。Any contents not described in detail in the present invention can be based on the common technical knowledge in the art.
本发明中，在相互不冲突的情况下，上述技术特征可以任意组合形成新的技术方案。In the present invention, the above technical features can be arbitrarily combined to form a new technical solution without conflicting with each other.
所述耐酸性腐蚀耐磨钢的屈服强度≥1100MPa，抗拉强度≥1300MPa，在典型煤矿采运用酸性矿井环境下服役时的均匀腐蚀速率为0.055～0.070mm/a，且相比于普通NM400级耐磨钢的耐腐蚀磨损性能提高了至少1.57倍。The yield strength of the acid corrosion-resistant wear-resistant steel is ≥1100MPa, and the tensile strength is ≥1300MPa. The uniform corrosion rate when serving in the acid mine environment of typical coal mining is 0.055-0.070mm/a, and the corrosion and wear resistance is improved by at least 1.57 times compared with ordinary NM400 grade wear-resistant steel.
本发明制造一种具有能够满足低pH、高矿化度、干湿交替煤矿采运服役环境服役下的力学性能和耐磨损腐蚀性能的钢材，可有效提高酸性煤矿采运用耐磨钢的服役寿命和可靠性。其基于现有生产工艺的制备方法使其具有良好的批量化生产可行性。The present invention manufactures a steel material having mechanical properties and wear and corrosion resistance that can meet the service environment of low pH, high mineralization, and alternating dry and wet coal mining and transportation, which can effectively improve the service life and reliability of wear-resistant steel used in acidic coal mining. Its preparation method based on the existing production process makes it feasible for mass production.
与现有技术相比，本发明的有益效果是：Compared with the prior art, the present invention has the following beneficial effects:
1.采用低碳中Cr少Mn设计，生产的耐酸性腐蚀耐磨钢兼具良好力学性能、耐磨性及耐腐蚀性，可有效减少因腐蚀磨损造成的钢材损失，提升钢材的可靠性及服役寿命，适合酸性高煤矿采运环境服役。1. The acid corrosion and wear-resistant steel produced by the low-carbon, medium-Cr and low-Mn design has good mechanical properties, wear resistance and corrosion resistance, which can effectively reduce the loss of steel caused by corrosion and wear, improve the reliability and service life of steel, and is suitable for service in the highly acidic coal mining and transportation environment.
2.本发明制造的耐酸性腐蚀耐磨钢时基于现有生产工艺优化的制备方法，具有良好的成本优势及大规模生产的可行性。2. The acid corrosion resistant and wear resistant steel manufactured by the present invention is a preparation method based on the optimization of the existing production process, which has good cost advantages and feasibility of large-scale production.
构成本申请的一部分的说明书附图用来提供对本发明的进一步理解，本发
明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。The accompanying drawings, which constitute a part of this application, are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions thereof are used to explain the present invention and do not constitute improper limitations on the present invention.
图1是本发明实施例1制备的20mm厚度耐酸性腐蚀耐磨钢的金相组织(图1a)及晶粒度(图1b)；FIG. 1 is a metallographic structure ( FIG. 1 a ) and grain size ( FIG. 1 b ) of a 20 mm thick acid corrosion resistant and wear resistant steel prepared in Example 1 of the present invention;
图2是本发明实施例1制备的20mm厚度耐酸性腐蚀耐磨钢在模拟矿井水腐蚀720h后的宏观(图2a)及微观形貌图(图2b)；FIG2 is a macroscopic ( FIG2a ) and microscopic morphology ( FIG2b ) of the 20 mm thick acid corrosion resistant and wear resistant steel prepared in Example 1 of the present invention after 720 hours of simulated mine water corrosion;
图3是常规NM400级耐磨钢在模拟矿井水腐蚀720h后的宏观(图3a)及微观形貌图(图3b)；FIG3 is a macroscopic ( FIG3a ) and microscopic morphology ( FIG3b ) of conventional NM400 grade wear-resistant steel after 720 hours of simulated mine water corrosion;
图4是本发明实施例1中制备的耐酸性腐蚀耐磨钢(图4a)和常规NM400级耐磨钢在模拟矿井水混合煤矿石冲击磨损腐蚀后的微观形貌图(图4b)；FIG4 is a microscopic morphology of the acid corrosion resistant wear-resistant steel ( FIG4a ) and conventional NM400 grade wear-resistant steel prepared in Example 1 of the present invention after impact wear and corrosion in simulated mine water mixed with coal ore ( FIG4b );
图5是本发明实施例1中制备的耐酸性腐蚀耐磨钢(图5a)和常规NM400级耐磨钢在模拟矿井水混合煤矿石干湿交替冲击磨损腐蚀后的微观形貌图(图5b)。5 is a microscopic morphology of the acid corrosion-resistant wear-resistant steel ( FIG. 5 a ) and conventional NM400 grade wear-resistant steel prepared in Example 1 of the present invention after being subjected to simulated mine water mixed coal ore dry-wet alternating impact wear corrosion ( FIG. 5 b ).
具体实施方式DETAILED DESCRIPTION
下面将对本发明实施例中的技术方案进行清楚、完整地描述，显然，本说明书中公开的任一特征，除非特别叙述，均可被其他等效或具有类似目的的替代特征加以替换。除非特别叙述，每个特征只是一系列等效或者类似特征中的一个例子而已。所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, any feature disclosed in this specification, unless otherwise stated, can be replaced by other alternative features that are equivalent or have similar purposes. Unless otherwise stated, each feature is just an example of a series of equivalent or similar features. The described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.
本发明未详细说明的内容均可采用本领域的常规技术知识。Any contents not described in detail in the present invention can be based on the common technical knowledge in the art.
实施例1Example 1
本实施例提供的用于煤矿采运用耐酸性腐蚀耐磨钢板及其制备方法，采用4300mm双辊可机架轧机生产成品厚度规格为20mm的耐磨蚀钢，具体元素组成如表1所示，余量为Fe及不可避免的杂质。The acid corrosion-resistant wear-resistant steel plate and its preparation method for coal mining provided in this embodiment adopts a 4300mm double-roller rolling mill to produce wear-resistant steel with a finished thickness of 20mm. The specific element composition is shown in Table 1, and the remainder is Fe and unavoidable impurities.
表1成分表(wt％)
Table 1 Ingredients (wt%)
Table 1 Ingredients (wt%)
本实施例中上述化学成分的耐磨蚀钢的制备方法包括以下步骤：The preparation method of the wear-resistant steel with the above chemical composition in this embodiment comprises the following steps:
(1)冶炼：(1) Smelting:
根据表1中的设计成分，通过冶炼、精炼及连铸后形成200mm断面的板坯；其中，冶炼终点温度控制在1640～1680℃。According to the designed composition in Table 1, a slab with a cross section of 200 mm is formed through smelting, refining and continuous casting; wherein the smelting end point temperature is controlled at 1640-1680°C.
(2)轧制：(2) Rolling:
冷坯经过两段式加热及均热40min后，利用慢速大压下技术进行轧制生产得到20mm厚度规格的钢板，总压下率90％。After two-stage heating and soaking for 40 minutes, the cold billet is rolled using slow and large reduction technology to produce a steel plate with a thickness of 20 mm, with a total reduction rate of 90%.
在轧制过程中，采用粗轧、精轧两段式轧制。在1170℃粗轧，粗轧压下率为66％，精轧阶段中，精轧开轧温度设定980℃，终轧温度840℃，精轧总压下率71％。控轧工艺参数如表2所示：In the rolling process, rough rolling and finishing rolling are adopted. Rough rolling is carried out at 1170℃, and the rough rolling reduction rate is 66%. In the finishing rolling stage, the finishing rolling start temperature is set at 980℃, the final rolling temperature is 840℃, and the total finishing rolling reduction rate is 71%. The control rolling process parameters are shown in Table 2:
表2制备耐酸性腐蚀耐磨钢控轧及冷却工艺参数
Table 2 Controlled rolling and cooling process parameters for preparing acid corrosion and wear resistant steel
Table 2 Controlled rolling and cooling process parameters for preparing acid corrosion and wear resistant steel
(3)淬火和低温回火热处理：(3) Quenching and low temperature tempering heat treatment:
将轧制得到的钢加热至900℃，保温15min进行奥氏体化，然后淬火至室温，得到以马氏体为主相的组织结构，获得较高的硬度。将淬火后的钢板加热至220℃，保温20min后空冷至室温，获得回火马氏体组织。The rolled steel is heated to 900°C, kept at this temperature for 15 minutes for austenitization, and then quenched to room temperature to obtain a martensite-based microstructure with a higher hardness. The quenched steel plate is heated to 220°C, kept at this temperature for 20 minutes, and then air-cooled to room temperature to obtain a tempered martensite microstructure.
表3实施例1得到的耐酸性腐蚀耐磨钢均匀腐蚀试验参数(参照GB/T19746-2005)
Table 3 Uniform corrosion test parameters of acid corrosion resistant wear-resistant steel obtained in Example 1 (refer to GB/T19746-2005)
Table 3 Uniform corrosion test parameters of acid corrosion resistant wear-resistant steel obtained in Example 1 (refer to GB/T19746-2005)
表4实施例1中热处理后煤矿采运耐酸性腐蚀耐磨钢的力学性能及腐蚀速率
Table 4 Mechanical properties and corrosion rate of acid corrosion resistant wear-resistant steel for coal mining and transportation after heat treatment in Example 1
Table 4 Mechanical properties and corrosion rate of acid corrosion resistant wear-resistant steel for coal mining and transportation after heat treatment in Example 1
现有技术中，常规NM400级耐磨钢对耐腐蚀性无明确要求，在本实施例中，以常规NM400级耐磨钢作为对比，腐蚀环境为模拟酸性煤矿水环境参照GB/T19746-2005进行的腐蚀测试。常规NM400钢成分为：C：0.24％，Si：0.39％，Mn：1.15％，P：0.007％，S：0.0001％ Mo：0.12％，Ti：0.015％，V：0.25％，B：0.001％，余量为Fe和其他不可避免的杂志。经测试，常规NM400耐磨钢的腐蚀速率为0.106mm/a。相比于常规NM400级耐磨钢，本实施例得到的煤炭采用耐酸性腐蚀耐磨钢的耐蚀性提升了1.93倍。In the prior art, conventional NM400 wear-resistant steel has no clear requirements for corrosion resistance. In this embodiment, conventional NM400 wear-resistant steel is used as a comparison, and the corrosion environment is a corrosion test conducted in accordance with GB/T19746-2005 in a simulated acidic coal mine water environment. The composition of conventional NM400 steel is: C: 0.24%, Si: 0.39%, Mn: 1.15%, P: 0.007%, S: 0.0001%, Mo: 0.12%, Ti: 0.015%, V: 0.25%, B: 0.001%, and the remainder is Fe and other unavoidable impurities. According to the test, the corrosion rate of conventional NM400 wear-resistant steel is 0.106mm/a. Compared with conventional NM400 wear-resistant steel, the corrosion resistance of the coal obtained in this embodiment using acid corrosion resistant wear-resistant steel is increased by 1.93 times.
实施例2Example 2
本实施例提供的用于煤矿采运用耐酸性腐蚀耐磨钢板及其制备方法，采用4300mm双机架轧机生产厚度规格为40mm的耐磨蚀钢，具体元素组成如表5所示，余量为Fe及不可避免的杂质。The acid corrosion-resistant wear-resistant steel plate and its preparation method for coal mining provided in this embodiment adopts a 4300mm double-stand rolling mill to produce wear-resistant steel with a thickness of 40mm. The specific element composition is shown in Table 5, and the remainder is Fe and unavoidable impurities.
表5成分表(wt％)
Table 5 Ingredients (wt%)
Table 5 Ingredients (wt%)
本实施例中上述化学成分的耐磨蚀钢的制备方法包括以下步骤：The preparation method of the wear-resistant steel with the above chemical composition in this embodiment comprises the following steps:
(1)冶炼：(1) Smelting:
根据表1中的设计成分，通过冶炼、精炼及连铸后形成250mm断面的板坯；其中，冶炼终点温度控制在1640～1670℃。According to the designed composition in Table 1, a slab with a cross section of 250 mm is formed through smelting, refining and continuous casting; wherein the smelting end point temperature is controlled at 1640-1670°C.
(2)轧制：(2) Rolling:
冷坯经过两段式加热及均热45min后，利用慢速大压下技术进行轧制生产得到40mm厚度规格的钢板，总压下率84％。After two-stage heating and soaking for 45 minutes, the cold billet is rolled using slow and large reduction technology to produce a steel plate with a thickness of 40 mm, with a total reduction rate of 84%.
在轧制过程中，采用粗轧、精轧两段式轧制。在1182℃粗轧，粗轧压下率为55％，精轧阶段中，精轧开轧温度设定960℃，终轧温度860℃，精轧总压
下率64％。控轧工艺参数如表6所示：During the rolling process, rough rolling and finishing rolling are adopted. Rough rolling is carried out at 1182℃, and the rough rolling reduction rate is 55%. In the finishing rolling stage, the finishing rolling start temperature is set at 960℃, the final rolling temperature is 860℃, and the finishing rolling total pressure is The reduction rate is 64%. The controlled rolling process parameters are shown in Table 6:
表6制备的NM400级耐酸性腐蚀耐磨钢控轧及冷却工艺参数
Table 6 Controlled rolling and cooling process parameters of prepared NM400 grade acid corrosion and wear resistant steel
Table 6 Controlled rolling and cooling process parameters of prepared NM400 grade acid corrosion and wear resistant steel
(3)淬火和低温回火热处理：(3) Quenching and low temperature tempering heat treatment:
将轧制得到的钢加热至900℃，保温15min进行奥氏体化然后淬火至室温，得到马氏体为主相的组织结构。将淬火后的钢板加热至220℃，保温20min后空冷至室温，获得回火马氏体组织。The rolled steel was heated to 900°C, kept at this temperature for 15 minutes for austenitization, and then quenched to room temperature to obtain a martensite-based microstructure. The quenched steel plate was heated to 220°C, kept at this temperature for 20 minutes, and then air-cooled to room temperature to obtain a tempered martensite microstructure.
表7为实施例2得到的耐酸性腐蚀耐磨钢均匀腐蚀试验参数(参照GB/T19746-2005)
Table 7 is the uniform corrosion test parameters of acid corrosion resistant wear-resistant steel obtained in Example 2 (refer to GB/T19746-2005)
Table 7 is the uniform corrosion test parameters of acid corrosion resistant wear-resistant steel obtained in Example 2 (refer to GB/T19746-2005)
表8实施例2中热处理后煤矿采运耐酸性腐蚀耐磨钢的力学性能及腐蚀速率
Table 8 Mechanical properties and corrosion rate of acid corrosion resistant wear-resistant steel for coal mining and transportation after heat treatment in Example 2
Table 8 Mechanical properties and corrosion rate of acid corrosion resistant wear-resistant steel for coal mining and transportation after heat treatment in Example 2
经测试，本实施例2腐蚀速率为0.057mm/a，相比于常规NM400级耐磨钢，本实施例2得到的耐酸性腐蚀耐磨钢的耐蚀性提升了1.57倍After testing, the corrosion rate of Example 2 is 0.057 mm/a. Compared with conventional NM400 grade wear-resistant steel, the corrosion resistance of the acid corrosion-resistant wear-resistant steel obtained in Example 2 is improved by 1.57 times.
以上两个实施例还对制备的煤炭采用耐酸性腐蚀耐磨钢的金相组织、腐蚀形貌进行了测试，且对比了常规NM400级耐磨钢在冲击腐蚀磨损情况下的腐蚀形貌。图1为实施例1中煤矿采运用耐酸性腐蚀耐磨钢的微观组织。图2为实施例1中煤炭采用耐酸性腐蚀NM400级耐磨钢的腐蚀后的宏观及微观形
貌。图3为常规NM400级耐磨钢在模拟矿井水腐蚀720h后的宏观(图3a)及微观形貌图(图3b)。图4为本发明实施例1中制备的耐酸性腐蚀耐磨钢(图4a)和常规NM400级耐磨钢在模拟矿井水混合煤矿石冲击磨损腐蚀后的微观形貌图(图4b)。图5是本发明实施例1中制备的耐酸性腐蚀耐磨钢(图5a)和常规NM400级耐磨钢在模拟矿井水混合煤矿石干湿交替冲击磨损腐蚀后的微观形貌图(图5b)。The above two examples also tested the metallographic structure and corrosion morphology of the prepared coal using acid corrosion resistant wear-resistant steel, and compared the corrosion morphology of conventional NM400 grade wear-resistant steel under impact corrosion and wear. Figure 1 is the microstructure of acid corrosion resistant wear-resistant steel used in coal mines in Example 1. Figure 2 is the macroscopic and microscopic morphology of the coal after corrosion using acid corrosion resistant NM400 grade wear-resistant steel in Example 1. Figure 3 is a macroscopic (Figure 3a) and microscopic morphology (Figure 3b) of conventional NM400 grade wear-resistant steel after 720 hours of simulated mine water corrosion. Figure 4 is a microscopic morphology (Figure 4b) of the acid corrosion resistant wear-resistant steel (Figure 4a) and conventional NM400 grade wear-resistant steel prepared in Example 1 of the present invention after impact wear corrosion by simulated mine water mixed coal ore. Figure 5 is a microscopic morphology (Figure 5b) of the acid corrosion resistant wear-resistant steel (Figure 5a) and conventional NM400 grade wear-resistant steel prepared in Example 1 of the present invention after dry-wet alternating impact wear corrosion by simulated mine water mixed coal ore.
由图1～5分析比较可见，相较于常规NM400级耐磨钢，本发明钢种腐蚀后产物致密，且成两层产物，所形成的的腐蚀产物膜可以阻碍腐蚀的进一步发展。同时，在冲击磨损情况下，常规NM400级耐磨钢在冲击腐蚀磨损过程中(干湿交替、湿磨冲击条件)都在表面由明显的点蚀现象。而本实施例中煤炭采用耐酸性腐蚀耐磨钢在冲击腐蚀磨损条件下，材料表面无点蚀，其耐蚀能力更强。From the analysis and comparison of Figures 1 to 5, it can be seen that compared with conventional NM400 grade wear-resistant steel, the corrosion products of the steel of the present invention are dense and form two layers of products. The corrosion product film formed can hinder the further development of corrosion. At the same time, under the impact wear condition, the conventional NM400 grade wear-resistant steel has obvious pitting on the surface during the impact corrosion wear process (dry-wet alternation, wet grinding impact conditions). In this embodiment, the coal adopts acid corrosion-resistant wear-resistant steel under the impact corrosion wear condition, and there is no pitting on the material surface, and its corrosion resistance is stronger.
本发明的工艺参数(如温度、时间等)区间上下限取值以及区间值都能实现本法，在此不一一列举实施例。The process parameters (such as temperature, time, etc.) of the present invention can realize the method by taking upper and lower limits and interval values, and the embodiments are not listed one by one here.
本发明未详细说明的内容均可采用本领域的常规技术知识。Any contents not described in detail in the present invention can be based on the conventional technical knowledge in the art.
最后所应说明的是，以上实施例仅用以说明本发明的技术方案而非限制。尽管参照实施例对本发明进行了详细说明，本领域的普通技术人员应该理解，对本发明的技术方案进行修改或者等同替换，都不脱离本发明技术方案的精神和范围，其均应涵盖在本发明的权利要求范围当中。
Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention is described in detail with reference to the embodiments, it should be understood by those skilled in the art that any modification or equivalent replacement of the technical solutions of the present invention does not depart from the spirit and scope of the technical solutions of the present invention and should be included in the scope of the claims of the present invention.
Claims (10)
- 一种煤矿采运用耐酸性腐蚀耐磨钢，其特征在于，所述耐酸性腐蚀耐磨钢包括以下质量百分数的化学成分：C：0.10～0.20％、Si：0.05～1.0％、Mn：0.10～1.0％、Cr：3.0～5.0％、P：0.05％以下、S：0.01％以下、B：0.0008～0.0020％，还含有Ni：0.01～1.0％、Mo：0.01～0.6％中的任意一种或两种，剩余部分由Fe和不可避免杂质构成。A kind of acid corrosion resistant wear-resistant steel for coal mining, characterized in that the acid corrosion resistant wear-resistant steel includes the following chemical components in mass percentage: C: 0.10-0.20%, Si: 0.05-1.0%, Mn: 0.10-1.0%, Cr: 3.0-5.0%, P: less than 0.05%, S: less than 0.01%, B: 0.0008-0.0020%, and also contains any one or two of Ni: 0.01-1.0%, Mo: 0.01-0.6%, and the rest is composed of Fe and unavoidable impurities.
- 根据权利要求1所述的煤矿采运用耐酸性腐蚀耐磨钢，其特征在于，所述耐酸性腐蚀耐磨钢还包括以下质量百分数的化学成分：Nb：0.01～0.1％、Ti：0.005～0.1％、V：0.005～0.1％中的1种或至少2种。The acid corrosion resistant and wear-resistant steel for coal mining according to claim 1 is characterized in that the acid corrosion resistant and wear-resistant steel also includes the following chemical components in mass percentage: one or at least two of Nb: 0.01-0.1%, Ti: 0.005-0.1%, and V: 0.005-0.1%.
- 根据权利要求1或2所述的煤矿采运用耐酸性腐蚀耐磨钢，其特征在于，所述耐酸性腐蚀耐磨钢的屈服强度≥1100MPa，抗拉强度≥1300MPa，在典型煤矿采运用酸性矿井环境下服役时的均匀腐蚀速率为0.055～0.070mm/a。The acid corrosion resistant and wear-resistant steel for coal mining according to claim 1 or 2 is characterized in that the yield strength of the acid corrosion resistant and wear-resistant steel is ≥1100MPa, the tensile strength is ≥1300MPa, and the uniform corrosion rate when serving in a typical acid mine environment for coal mining is 0.055-0.070mm/a.
- 一种煤矿采运用耐酸性腐蚀耐磨钢的制备方法，所述制备方法包括以下步骤：A method for preparing acid corrosion-resistant and wear-resistant steel for coal mining, the preparation method comprising the following steps:1)合金选择：按照权利要求1～3任一项所述耐酸性腐蚀耐磨钢化学成分的质量百分比选择合金；1) Alloy selection: select the alloy according to the mass percentage of the chemical composition of the acid corrosion resistant and wear resistant steel according to any one of claims 1 to 3;2)转炉冶炼和精炼：2) Converter smelting and refining:采用低硫铁水转炉冶炼，按照合金成分中限控制加入硅铁、中碳铬铁进行合金化，转炉冶炼全程吹氩，终渣碱度控制在3.0～3.5范围内，转炉冶炼确保一次拉碳，渣料在终点前3min内加完；LF精炼时间不低于40min，全程底吹氩搅拌，采用碳化钙、铝渣或铝粒脱氧，通过喂线调整并达到B、Ti、Al成分要求；Low-sulfur hot metal converter smelting is adopted, and ferrosilicon and medium-carbon ferrochrome are added for alloying according to the limit control of alloy composition. Argon is blown throughout the converter smelting process, and the final slag basicity is controlled within the range of 3.0-3.5. The converter smelting ensures carbon pulling in one time, and the slag is added within 3 minutes before the end point; the LF refining time is not less than 40 minutes, and argon is blown at the bottom for stirring throughout the process. Calcium carbide, aluminum slag or aluminum particles are used for deoxidation, and the B, Ti and Al components are adjusted and met through wire feeding;3)连铸和轧制：3) Continuous casting and rolling:经冶炼后，采用连铸机在1.1-1.4m/min拉速拉坯，结晶器保护渣采用包晶钢保护渣，铸坯末端采用轻压下，铸坯下线缓冷48h以上，并检查清理表面，所述铸坯厚度为200～300mm；After smelting, a continuous casting machine is used to cast the billet at a speed of 1.1-1.4 m/min, the mold protection slag is peritectic steel protection slag, the end of the billet is lightly pressed down, the billet is slowly cooled for more than 48 hours after it comes off the line, and the surface is checked and cleaned. The thickness of the billet is 200-300 mm;将铸坯在1170-1250℃加热保温，采用大压下技术进行轧制，轧后离线淬火并低温回火；在粗轧前通过上下集管除鳞；The ingot is heated and kept at 1170-1250℃, rolled using high reduction technology, quenched offline and tempered at low temperature after rolling; descaled through upper and lower headers before rough rolling;4)淬火和低温回火热处理： 4) Quenching and low temperature tempering heat treatment:将轧制得到的钢坯进行轧后在线/离线淬火和低温回火处理。The rolled steel billet is subjected to online/offline quenching and low temperature tempering treatment after rolling.
- 根据权利要求4所述的制备方法，其特征在于，所述轧制过程中，大压下技术为：在1170-1250℃开轧，总压下率为80～90％，应变速率为0.2～2.0s-1，中间坯/成品厚度在3.5～4.0之间；粗轧过程中，粗轧压下率为65％～75％，粗轧变形率≥65％；精轧开轧温度在960～1000℃，精轧终轧温度840～870℃，精轧压下率为60～70％，精轧总变形率≥60％。The preparation method according to claim 4 is characterized in that, during the rolling process, the large reduction technology is: rolling at 1170-1250°C, the total reduction rate is 80-90%, the strain rate is 0.2-2.0s -1 , and the intermediate billet/finished product thickness is between 3.5 and 4.0; during the rough rolling process, the rough rolling reduction rate is 65%-75%, and the rough rolling deformation rate is ≥65%; the finishing rolling start temperature is 960-1000°C, the finishing rolling final rolling temperature is 840-870°C, the finishing rolling reduction rate is 60-70%, and the finishing rolling total deformation rate is ≥60%.
- 根据权利要求4或5所述的制备方法，其特征在于，轧制过程中，板坯通过两段加热及均热，其中均热时间≥40min，加热一段温度区间在1050～1180℃，加热二段1180～1280℃，均热段1170～1250℃。The preparation method according to claim 4 or 5 is characterized in that, during the rolling process, the slab is heated and evenly heated in two stages, wherein the evenly heated time is ≥40 min, the temperature range of the first heating stage is 1050-1180°C, the second heating stage is 1180-1280°C, and the evenly heated stage is 1170-1250°C.
- 根据权利要求4或5所述的制备方法，其特征在于，所述轧后在线/离线淬火，淬火步骤是指将轧制得到的钢加热至900～920℃，保温10～15min进行奥氏体化，然后水冷至室温。The preparation method according to claim 4 or 5 is characterized in that the online/offline quenching after rolling, the quenching step refers to heating the rolled steel to 900-920°C, keeping it warm for 10-15 minutes for austenitization, and then water cooling it to room temperature.
- 根据权利要求4或5所述的制备方法，其特征在于，所述低温回火处理是将淬火后得到的钢加热至200～220℃，保温10～15min，然后空冷至室温。The preparation method according to claim 4 or 5 is characterized in that the low-temperature tempering treatment is to heat the steel obtained after quenching to 200-220°C, keep it warm for 10-15 minutes, and then air-cool it to room temperature.
- 根据权利要求4～6任一项所述的制备方法，其特征在于，所述耐酸性腐蚀耐磨钢为板材，厚度为8～40mm。The preparation method according to any one of claims 4 to 6 is characterized in that the acid corrosion resistant and wear resistant steel is a plate with a thickness of 8 to 40 mm.
- 根据权利要求4～6任一项所述的制备方法，其特征在于，所述耐酸性腐蚀耐磨钢以回火马氏体相为主相，含量≥90％；且原奥氏体晶粒度在8级以上，表面硬度以布氏硬度HBW10/3000记为370以上。 The preparation method according to any one of claims 4 to 6 is characterized in that the acid corrosion resistant and wear-resistant steel has a tempered martensite phase as a main phase with a content of ≥90%; and the original austenite grain size is above level 8, and the surface hardness is above 370 in terms of Brinell hardness HBW10/3000.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1932066A (en) * | 2006-10-18 | 2007-03-21 | 合肥工业大学 | Low carbon high alloy steel for ball mill lining and its making process |
| CN104818435A (en) * | 2015-03-13 | 2015-08-05 | 北京科技大学 | Preparation method for NM400 grade wear-resistant steel plate with corrosion resistance |
| CN105063497A (en) * | 2015-09-17 | 2015-11-18 | 东北大学 | High-wear-resistance high-machinability low-alloy wear-resistant steel plate and manufacturing method thereof |
| CN112159934A (en) * | 2020-09-30 | 2021-01-01 | 东北大学 | Anti-corrosion wear-resistant steel plate and preparation method thereof |
| US20220145414A1 (en) * | 2018-12-19 | 2022-05-12 | Voestalpine Stahl Gmbh | Method for Producing Conventionally Hot-Rolled Profiled Strip Products |
| CN116574968A (en) * | 2023-03-31 | 2023-08-11 | 莱芜钢铁集团银山型钢有限公司 | Acid corrosion-resistant wear-resistant steel for coal mine production and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1932066A (en) * | 2006-10-18 | 2007-03-21 | 合肥工业大学 | Low carbon high alloy steel for ball mill lining and its making process |
| CN104818435A (en) * | 2015-03-13 | 2015-08-05 | 北京科技大学 | Preparation method for NM400 grade wear-resistant steel plate with corrosion resistance |
| CN105063497A (en) * | 2015-09-17 | 2015-11-18 | 东北大学 | High-wear-resistance high-machinability low-alloy wear-resistant steel plate and manufacturing method thereof |
| US20220145414A1 (en) * | 2018-12-19 | 2022-05-12 | Voestalpine Stahl Gmbh | Method for Producing Conventionally Hot-Rolled Profiled Strip Products |
| CN112159934A (en) * | 2020-09-30 | 2021-01-01 | 东北大学 | Anti-corrosion wear-resistant steel plate and preparation method thereof |
| CN116574968A (en) * | 2023-03-31 | 2023-08-11 | 莱芜钢铁集团银山型钢有限公司 | Acid corrosion-resistant wear-resistant steel for coal mine production and preparation method thereof |
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