CN106566989A - Hot rolling wide strip steel for vanadium-containing tool and production method for hot rolling wide strip steel - Google Patents
Hot rolling wide strip steel for vanadium-containing tool and production method for hot rolling wide strip steel Download PDFInfo
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- CN106566989A CN106566989A CN201610936855.4A CN201610936855A CN106566989A CN 106566989 A CN106566989 A CN 106566989A CN 201610936855 A CN201610936855 A CN 201610936855A CN 106566989 A CN106566989 A CN 106566989A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 51
- 239000010959 steel Substances 0.000 title claims abstract description 51
- 229910052720 vanadium Inorganic materials 0.000 title claims abstract description 48
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 238000005098 hot rolling Methods 0.000 title abstract description 15
- 238000005096 rolling process Methods 0.000 claims abstract description 75
- 238000001816 cooling Methods 0.000 claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims abstract description 27
- 238000003723 Smelting Methods 0.000 claims abstract description 25
- 238000009749 continuous casting Methods 0.000 claims abstract description 17
- 238000007670 refining Methods 0.000 claims abstract description 17
- 239000000126 substance Substances 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000000605 extraction Methods 0.000 claims abstract description 9
- 239000012535 impurity Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 23
- 238000010583 slow cooling Methods 0.000 claims description 14
- 229910000859 α-Fe Inorganic materials 0.000 claims description 14
- 229910052748 manganese Inorganic materials 0.000 claims description 10
- 229910001562 pearlite Inorganic materials 0.000 claims description 9
- 229910052719 titanium Inorganic materials 0.000 claims description 9
- 238000007664 blowing Methods 0.000 claims description 8
- 238000005266 casting Methods 0.000 claims description 8
- 229910052698 phosphorus Inorganic materials 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 8
- 229910052717 sulfur Inorganic materials 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000010304 firing Methods 0.000 abstract 1
- 239000011572 manganese Substances 0.000 description 9
- 239000010936 titanium Substances 0.000 description 8
- 229910052799 carbon Inorganic materials 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 239000000470 constituent Substances 0.000 description 6
- 238000003860 storage Methods 0.000 description 6
- 229910001315 Tool steel Inorganic materials 0.000 description 5
- 229910001566 austenite Inorganic materials 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 238000005728 strengthening Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 229910000677 High-carbon steel Inorganic materials 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910001563 bainite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical group 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910017464 nitrogen compound Inorganic materials 0.000 description 1
- 150000002830 nitrogen compounds Chemical class 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000011417 postcuring Methods 0.000 description 1
- 238000004881 precipitation hardening Methods 0.000 description 1
- 238000013000 roll bending Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- 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
- 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
-
- 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
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing 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
- 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
- C21D2211/005—Ferrite
-
- 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
- C21D2211/009—Pearlite
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The invention discloses hot rolling wide strip steel for a vanadium-containing tool and a production method for the hot rolling wide strip steel. The hot rolling wide strip steel comprises the following chemical components of, by weight, 0.36%-0.42% of C, 0-0.40% of Si, 1.15%-1.45% of Mn, 0-0.025% of P, 0-0.035% of S, 0-0.10% of V, 0-0.04% of Ti, 0-0.045% of Als, 0-0.005% of B, and the balance Fe and unavoidable impurity elements. The production method comprises the following steps of converter vanadium extraction, converter smelting, LF refining, slab continuous casting, direct slab heating, high-pressure water descaling, controlled rolling, control laminar cooling and reeling. According to the hot rolling wide strip steel for the vanadium-containing tool and the production method for the hot rolling wide strip steel, microalloy element vanadium is added to be matched with low temperature fast firing and controlled rolling low temperature high reduction technology, so that the thickness of a plate rolling decarburized layer and the strip steel structure are controlled, and the strength grade of the product is increased. According to the comprehensive performance of the hot rolling wide strip steel, the tensile strength is larger than or equal to 750 mpa, the elongation is larger than or equal to 22%, the yield strength is larger than or equal to 500 mpa, the hardness HV10 is larger than or equal to 224, the decarburized layer is smaller than 1% D, and D is the thickness of a hot rolling material.
Description
Technical field
The invention belongs to metallurgical technology field, and in particular to a kind of broad hot strip of instrument containing vanadium and its production method.
Background technology
Hot-strip tool steel is primarily referred to as the neck such as work, mining industry saw blade, wood working tool, agricultural machinery blade
Domain, domestic at present is mainly 65Mn, 75Cr1 etc. using the trade mark, when producing high-carbon series of tools steel on hot-rolled coil production line,
Control product decarburized layer deepness becomes controlling difficulties, and decarburized layer deepness is easily caused greatly product hardness inequality occurs after material heat treatment
Phenomenon.
China's vanadium resource enriches very much, either resources reserve, or vanadium yield is respectively positioned on No. 1 in the world, holds steel and has
Advantageous vanadium titano-magnetite resources advantage, it is developing direction that resources advantage is switched to into product advantage, how to be passed through in steel
Addition vanadium obtains in-depth study and application in steel, and then is improved the quality of product.
The present invention develops the broad hot strip of instrument containing vanadium for showing unique characteristics.Make use of solid solubility of the V in austenite
It is higher, but the solid solubility in ferrite is relatively low, in hot rolling γ → α transition processes, with V（C, N）Compound form is analysed
Go out, under the comprehensive function of phase transformation strengthening and refined crystalline strengthening, finally improve intensity, wearability instrument steel plate, its tension is strong
Degree >=750MPa, elongation percentage >=22%, yield strength >=500MPa, hardness HV10 >=224.It is to compare instrument salable at present to use
Steel, has complied with the demand of development.
The content of the invention
The present invention provides a kind of broad hot strip of instrument containing vanadium and its production method.Solid solution using V in austenite
Degree is higher, but the solid solubility in ferrite is relatively low, alternate precipitation in γ → α transition processes and in ferrite
Refined crystalline strengthening is separated out, therefore adds appropriate V to play good effect in steel.
An object of the present invention is to provide a kind of broad hot strip of instrument containing vanadium, the broad hot strip chemical composition
And its percentage by weight is as follows：C：0.36-0.42%, Si≤0.40%, Mn：1.15～1.45%, P≤0.025%, S≤0.035%,
V≤0.10%, Ti≤0.04%, Als≤0.045%, B≤0.005%, balance of Fe and inevitable impurity element.
Broad hot strip performance indications of the present invention are as follows：Tensile strength >=750MPa, elongation percentage >=22%, surrender is strong
Degree >=500MPa, hardness HV10 >=224, decarburized layer is less than 1%D, and the D is hot-finished material thickness.
Broad hot strip of the present invention is organized as the ferrite of pearlite and 5-10%.
It is a further object of the present invention to provide a kind of production method of above-mentioned broad hot strip of instrument containing vanadium, the production
Method comprises the steps：Vanadium extraction by converter blowing, converter smelting, LF refining, directly sheet billet continuous casting, dress heating of plate blank, high-pressure water descaling, control
System rolls, controls section cooling, batches, and the controlled rolling operation includes roughing rolling, Coil Box, finish rolling rolling.
Roughing of the present invention is the rolling of 5 roads, and outlet temperature is 1020～1050 DEG C.
Exit temperature at finishing of the present invention is 850～880 DEG C.
Converter smelting operation of the present invention is according to set component smelting molten steel, molten steel Jing LF refinings, continuous casting protective casting
Obtain slab.
Steel slab is heated to 1180～1210 DEG C by heating of plate blank operation of the present invention, and heat time heating time, control existed
Within 140min.
Control laminar flow refrigerating work procedure of the present invention adopts air cooling pattern.
730-770 DEG C of coiling process coiling temperature of the present invention, batches offline stacking slow cooling.Batch and adopt high temperature coiling
Inhomogeneous cooling is even to produce the life of roll bending wooden dipper curly hair to avoid cooling from causing soon.
The mentality of designing of chemical composition of the present invention：
It is characteristic of the invention that adding microalloy element vanadium on the basis of conventional intensified element carbon, manganese, and coordinate controlled rolling
The too fast formation martensite of rate of cooling and bainite are avoided with high temperature curling, while reduce steel band causes cooling because cooling is too fast
It is uneven, there is flatness defect, affect follow-up Quenching Treatment effect.
Vanadium strengthening mechanism：
Tool steel one of higher product of broad hot strip technology content and added value, the kind and quality of same tool steel plate are weighing apparatuses
The important symbol of amount metallurgy technical equipment and industrial technology level.On domestic market tool steel it is main still 45#,
The trades mark such as 65Mn, 75Cr1.Tool steel is mainly by using the wearability and intensity of carbon raising product, but high-carbon steel
Decarburized layer deepness control difficulty is larger.Therefore the R＆D work of the steel band of instrument containing vanadium is imperative.
V:Vanadium is the excessive race's metallic element for being located at periodic table of elements period 4 Group VB, is strong carbide and nitrogen
Compound formation element, with low refined crystalline strengthening and high precipitation hardening effect.Solid solubility of the V in austenite compared with
Height, but the solid solubility in ferrite is relatively low, is a kind of preferable low temperature ferrite precipitation strength element.Vanadium carbonitride
Separating out in austenite will accelerate ferrite forming core, raise transition temperature；Vanadium, titanium and carbon are combined to form in heat treatment process
Strong carbide, consumingly hinders diffusion of the carbon in steel, thus sharp slows down the austenitizing of Carbon diffusion speed and steel
Process, therefore in cooling procedure, separating out VC has precipitation enhancement.In drawing process, V slows down diffusions of the C in α phases,
Slow down the precipitation of the carbides such as Fe, Mn and grow up, increase temper resistance and wearability, and by separating out VC, and may play
Post-curing is acted on, so as to extend the service life of instrument.
Rolling mill practice：Using Controlled Rolling And Controlled Cooling, heating and temperature control is in the range of 1180～1210 DEG C, and finish rolling outlet is warm
Degree is within 850～880 DEG C, it is ensured that the phase transformation of single phase austenite area is rolled, the cold employing air cooling technique of layer, it is to avoid layer cold water is cooled down not
Template is caused to produce wooden dipper Qu Wenti, while high temperature curling guarantees that material body tissue is a large amount of pearlite and a small amount of ferrum element
Body.
It is using the beneficial effect produced by above-mentioned technical proposal：The present invention is on conventional intensified element carbon, the basis of manganese
Upper addition microalloy element vanadium, and rate of cooling is too fast to form martensite and bayesian to coordinate controlled rolling and high temperature curling to avoid
Body, causes inhomogeneous cooling even while reducing steel band because cooling is too fast, flatness defect occurs, affects follow-up Quenching Treatment effect
Really.Broad hot strip tensile strength >=the 750MPa of production, elongation percentage >=22%, yield strength >=500MPa, hardness HV10 >=224,
Decarburized layer is less than 1%D.
Specific embodiment
With reference to specific embodiment, the present invention will be further described in detail.
Using the thickness 2.0-12mm of present invention production, width is the accumulative production of many specification instrument steel of 1000-1620mm
5000 tons are reached, and delivered downstream user processing is used, its mechanical property, decarburized layer deepness, tissue, nonmetal inclusion
The property indices such as thing, hardness are satisfied by user's use requirement.
Embodiment 1
Thickness 3mm, width 1260mm, the steel of instrument containing vanadium, the broad hot strip chemical constituent and percentage by weight are：C：
0.39%, Si：0.22%, Mn：1.23%, P：0.013%, S：0.004%, V：0.016%, Ti：0.036%, Als：0.021%, B：
0.0030%, balance of Fe and inevitable impurity element.Broad hot strip is organized as pearlite and 10% ferrite.
Production method comprises the steps：Vanadium extraction by converter blowing, converter smelting, LF refining, sheet billet continuous casting, directly fill heating of plate blank,
High-pressure water descaling, controlled rolling, control section cooling, batch, put slow cooling in storage.Controlled rolling operation includes roughing rolling, hot rolling
Case, finish rolling rolling.
Roughing rolling process is the rolling of 5 roads, and outlet temperature is 1046 DEG C；Finish rolling rolling process outlet temperature is 858 DEG C；Turn
Stove smelting procedure obtains slab according to set component smelting molten steel, molten steel Jing LF refinings, continuous casting protective casting；Heating of plate blank operation
Steel slab is heated to into 1200 DEG C, heat time heating time is controlled in 122min；Control laminar flow refrigerating work procedure adopts air cooling pattern；Batch
730 DEG C of operation coiling temperature, batches offline stacking slow cooling.
Embodiment 2
Thickness 7.8mm, width 1510mm, the steel of instrument containing vanadium, the broad hot strip chemical constituent and percentage by weight are：C：
0.39%, Si：0.21%, Mn：1.25%, P：0.016%, S：0.003%, V：0.020%, Ti：0.034%, Als：0.022%, B：
0.0036%, balance of Fe and inevitable impurity element.Broad hot strip is organized as pearlite and 5% ferrite.
Production method comprises the steps：Vanadium extraction by converter blowing, converter smelting, LF refining, sheet billet continuous casting, directly fill heating of plate blank,
High-pressure water descaling, controlled rolling, control section cooling, batch, put slow cooling in storage.Controlled rolling operation includes roughing rolling, hot rolling
Case, finish rolling rolling.
Roughing rolling process is the rolling of 5 roads, and outlet temperature is 1045 DEG C；Finish rolling rolling process outlet temperature is 860 DEG C；Turn
Stove smelting procedure obtains slab according to set component smelting molten steel, molten steel Jing LF refinings, continuous casting protective casting；Heating of plate blank operation
Steel slab is heated to into 1195 DEG C, heat time heating time is controlled in 126min；Control laminar flow refrigerating work procedure adopts air cooling pattern；Batch
745 DEG C of operation coiling temperature, batches offline stacking slow cooling.
Embodiment 3
Thickness 12mm, width 1180mm, the steel of instrument containing vanadium, the broad hot strip chemical constituent and percentage by weight are：C：
0.40%, Si：0.22%, Mn：1.25%, P：0.012%, S：0.002%, V：0.021%, Ti：0.036%, Als：0.019%, B：
0.0037%, balance of Fe and inevitable impurity element.Broad hot strip is organized as pearlite and 6% ferrite.
Production method comprises the steps：Vanadium extraction by converter blowing, converter smelting, LF refining, sheet billet continuous casting, directly fill heating of plate blank,
High-pressure water descaling, controlled rolling, control section cooling, batch, put slow cooling in storage.Controlled rolling operation includes roughing rolling, hot rolling
Case, finish rolling rolling.
Roughing rolling process is the rolling of 5 roads, and outlet temperature is 1042 DEG C；Finish rolling rolling process outlet temperature is 850～880
℃；Converter smelting operation obtains slab according to set component smelting molten steel, molten steel Jing LF refinings, continuous casting protective casting；Slab adds
Steel slab is heated to 1190 DEG C by thermal technology's sequence, and heat time heating time is controlled in 128min；Control laminar flow refrigerating work procedure adopts air cooling mould
Formula；750 DEG C of coiling process coiling temperature, batches offline stacking slow cooling.
Embodiment 4
Thickness 10mm, width 1380mm, the steel of instrument containing vanadium, the broad hot strip chemical constituent and percentage by weight are：C：
0.40%, Si：0.23%, Mn：1.26%, P：0.012%, S：0.003%, V：0.022%, Ti：0.035%, Als：0.018%, B：
0.0035%, balance of Fe and inevitable impurity element.Broad hot strip is organized as pearlite and 8% ferrite.
Production method comprises the steps：Vanadium extraction by converter blowing, converter smelting, LF refining, sheet billet continuous casting, directly fill heating of plate blank,
High-pressure water descaling, controlled rolling, control section cooling, batch, put slow cooling in storage.Controlled rolling operation includes roughing rolling, hot rolling
Case, finish rolling rolling.
Roughing rolling process is the rolling of 5 roads, and outlet temperature is 1038 DEG C；Finish rolling rolling process outlet temperature is 860 DEG C；Turn
Stove smelting procedure obtains slab according to set component smelting molten steel, molten steel Jing LF refinings, continuous casting protective casting；Heating of plate blank operation
Steel slab is heated to into 1190 DEG C, heat time heating time is controlled in 130min；Control laminar flow refrigerating work procedure adopts air cooling pattern；Batch
755 DEG C of operation coiling temperature, batches offline stacking slow cooling.
Embodiment 5
Thickness 12mm, width 1180mm, the steel of instrument containing vanadium, the broad hot strip chemical constituent and percentage by weight are：C：
0.36%, Si：0.40%, Mn：1.15%, P：0.025%, S：0.002%, V：0.019%, Ti：0.028%, Als：0.017%, B：
0.0034%, balance of Fe and inevitable impurity element.Broad hot strip is organized as pearlite and 9% ferrite.
Production method comprises the steps：Vanadium extraction by converter blowing, converter smelting, LF refining, sheet billet continuous casting, directly fill heating of plate blank,
High-pressure water descaling, controlled rolling, control section cooling, batch, put slow cooling in storage.Controlled rolling operation includes roughing rolling, hot rolling
Case, finish rolling rolling.
Roughing rolling process is the rolling of 5 roads, and outlet temperature is 1020 DEG C；Finish rolling rolling process outlet temperature is 880 DEG C；Turn
Stove smelting procedure obtains slab according to set component smelting molten steel, molten steel Jing LF refinings, continuous casting protective casting；Heating of plate blank operation
Steel slab is heated to into 1200 DEG C, heat time heating time is controlled in 128min；Control laminar flow refrigerating work procedure adopts air cooling pattern；Batch
760 DEG C of operation coiling temperature, batches offline stacking slow cooling.
Embodiment 6
Thickness 10mm, width 1620mm, the steel of instrument containing vanadium, the broad hot strip chemical constituent and percentage by weight are：C：
0.42%, Si：0.23%, Mn：1.45%, P：0.010%, S：0.005%, V：0.024%, Ti：0.038%, Als：0.025%, B：
0.0050%, balance of Fe and inevitable impurity element.Broad hot strip is organized as pearlite and 6% ferrite.
Production method comprises the steps：150 tons of vanadium extraction by converter blowing, 150 tons of converter smeltings, LF refining, sheet billet continuous casting, straight dresses
Heating of plate blank, high-pressure water descaling, controlled rolling, control section cooling, batch, put slow cooling in storage.Controlled rolling operation includes roughing
Rolling, Coil Box, finish rolling rolling.
Roughing rolling process is the rolling of 5 roads, and outlet temperature is 1045 DEG C；Finish rolling rolling process outlet temperature is 850 DEG C；Turn
Stove smelting procedure obtains slab according to set component smelting molten steel, molten steel Jing LF refinings, continuous casting protective casting；Heating of plate blank operation
Steel slab is heated to into 1180 DEG C, heat time heating time is controlled in 140min；Control laminar flow refrigerating work procedure adopts air cooling pattern；Batch
770 DEG C of operation coiling temperature, batches offline stacking slow cooling.
Carry out mechanics properties testing to the product in above-described embodiment 1-6, yield strength >=500MPa, tensile strength >=
There is good mechanical strength and plasticity to match for 750MPa, elongation percentage >=22%, hardness HV10 >=224, specific targets such as table 1, table
Shown in 2.
The embodiment 1-6 broad hot strip performance detection data of table 1
The embodiment 1-6 broad hot strip microscopic structure of table 2
Claims (10)
1. a kind of broad hot strip of instrument containing vanadium, it is characterised in that the broad hot strip chemical composition and its weight percent
Than as follows：C：0.36-0.42%, Si≤0.40%, Mn：1.15～1.45%, P≤0.025%, S≤0.035%, V≤0.10%, Ti
≤ 0.04%, Als≤0.045%, B≤0.005%, balance of Fe and inevitable impurity element.
2. one kind instrument containing vanadium broad hot strip according to claim 1, it is characterised in that the broad hot strip
Energy index is as follows：Tensile strength >=750MPa, elongation percentage >=22%, yield strength >=500MPa, hardness HV10 >=224, decarburized layer
Less than 1%D, the D is hot-finished material thickness.
3. one kind instrument containing vanadium broad hot strip according to claim 1, it is characterised in that the broad hot strip group
It is woven to the ferrite of pearlite and 5-10%.
4. a kind of production method of the broad hot strip of instrument containing vanadium being based on described in claim 1-3 any one, its feature
It is that the production method comprises the steps：Vanadium extraction by converter blowing, converter smelting, LF refining, sheet billet continuous casting, directly fill heating of plate blank,
High-pressure water descaling, controlled rolling, control section cooling, batch, the controlled rolling operation include roughing rolling, Coil Box, essence
Rolling.
5. production method according to claim 4, it is characterised in that the roughing rolling process is the rolling of 5 roads, outlet temperature
Spend for 1020～1050 DEG C.
6. production method according to claim 4, it is characterised in that the finish rolling rolling process outlet temperature is 850～
880℃。
7. the production method according to claim 4-6 any one, it is characterised in that the converter smelting operation is according to setting
Determine composition smelting molten steel, molten steel Jing LF refinings, continuous casting protective casting obtain slab.
8. the production method according to claim 4-6 any one, it is characterised in that the heating of plate blank operation is by slab
Hot charging is heated to 1180～1210 DEG C, and heat time heating time is controlled within 140min.
9. the production method according to claim 4-6 any one, it is characterised in that the control laminar flow refrigerating work procedure is adopted
Use air cooling pattern.
10. the production method according to claim 4-6 any one, it is characterised in that the coiling process coiling temperature
730-770 DEG C, batch offline stacking slow cooling.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107587070A (en) * | 2017-09-15 | 2018-01-16 | 河钢股份有限公司承德分公司 | Hot rolling broadband leaf spring steel and its production method |
| CN107824619A (en) * | 2017-10-25 | 2018-03-23 | 河钢股份有限公司 | A kind of method for improving strip property uniformity |
| CN110527914A (en) * | 2019-09-25 | 2019-12-03 | 唐山汇丰钢铁有限公司 | A kind of building tie rod special-purpose steel and its production technology |
| CN111101059A (en) * | 2019-12-26 | 2020-05-05 | 河钢股份有限公司承德分公司 | Hot-formed steel hot-rolled plate strip base material for vanadium-containing agricultural blade and production method thereof |
| CN111100977A (en) * | 2019-12-18 | 2020-05-05 | 河钢股份有限公司承德分公司 | Production method of hot-rolled high-carbon steel |
| CN114000068A (en) * | 2021-10-29 | 2022-02-01 | 攀钢集团攀枝花钢铁研究院有限公司 | Low-nitrogen ultrahigh-strength hot-rolled steel strip with thickness of 4-10mm and production method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008280608A (en) * | 2007-04-13 | 2008-11-20 | Jfe Steel Kk | High-strength hot-dip galvanized steel sheet excellent in workability and weldability, and its manufacturing method |
| CN103774041A (en) * | 2014-01-24 | 2014-05-07 | 宝山钢铁股份有限公司 | Thin-strip continuous casting economical high-strength binding strip with tensile strength more than or equal to 1100MPa and manufacturing method thereof |
| CN104513928A (en) * | 2014-12-25 | 2015-04-15 | 河北钢铁股份有限公司承德分公司 | Broad hot strip steel production method for vanadium-containing middle-level petroleum and natural gas conveying tube |
| CN105088071A (en) * | 2015-08-24 | 2015-11-25 | 河北钢铁股份有限公司承德分公司 | Ultrathin-specification broad hot strip with tensile strength as 600MPa and producing method thereof |
-
2016
- 2016-11-01 CN CN201610936855.4A patent/CN106566989B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008280608A (en) * | 2007-04-13 | 2008-11-20 | Jfe Steel Kk | High-strength hot-dip galvanized steel sheet excellent in workability and weldability, and its manufacturing method |
| CN103774041A (en) * | 2014-01-24 | 2014-05-07 | 宝山钢铁股份有限公司 | Thin-strip continuous casting economical high-strength binding strip with tensile strength more than or equal to 1100MPa and manufacturing method thereof |
| CN104513928A (en) * | 2014-12-25 | 2015-04-15 | 河北钢铁股份有限公司承德分公司 | Broad hot strip steel production method for vanadium-containing middle-level petroleum and natural gas conveying tube |
| CN105088071A (en) * | 2015-08-24 | 2015-11-25 | 河北钢铁股份有限公司承德分公司 | Ultrathin-specification broad hot strip with tensile strength as 600MPa and producing method thereof |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107587070A (en) * | 2017-09-15 | 2018-01-16 | 河钢股份有限公司承德分公司 | Hot rolling broadband leaf spring steel and its production method |
| CN107824619A (en) * | 2017-10-25 | 2018-03-23 | 河钢股份有限公司 | A kind of method for improving strip property uniformity |
| CN110527914A (en) * | 2019-09-25 | 2019-12-03 | 唐山汇丰钢铁有限公司 | A kind of building tie rod special-purpose steel and its production technology |
| CN111100977A (en) * | 2019-12-18 | 2020-05-05 | 河钢股份有限公司承德分公司 | Production method of hot-rolled high-carbon steel |
| CN111101059A (en) * | 2019-12-26 | 2020-05-05 | 河钢股份有限公司承德分公司 | Hot-formed steel hot-rolled plate strip base material for vanadium-containing agricultural blade and production method thereof |
| CN114000068A (en) * | 2021-10-29 | 2022-02-01 | 攀钢集团攀枝花钢铁研究院有限公司 | Low-nitrogen ultrahigh-strength hot-rolled steel strip with thickness of 4-10mm and production method thereof |
| CN114000068B (en) * | 2021-10-29 | 2022-09-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Low-nitrogen ultrahigh-strength hot-rolled steel strip with thickness of 4-10mm and production method thereof |
| CN114807555A (en) * | 2022-04-19 | 2022-07-29 | 安阳钢铁集团有限责任公司 | Production method of high-carbon high-silicon spring steel hot continuous rolling steel strip |
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| CN106566989B (en) | 2019-04-05 |
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