CN114737126A - Hot-dip galvanized steel sheet and method for producing same - Google Patents
Hot-dip galvanized steel sheet and method for producing same Download PDFInfo
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- CN114737126A CN114737126A CN202210416940.3A CN202210416940A CN114737126A CN 114737126 A CN114737126 A CN 114737126A CN 202210416940 A CN202210416940 A CN 202210416940A CN 114737126 A CN114737126 A CN 114737126A
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- 229910001335 Galvanized steel Inorganic materials 0.000 title claims abstract description 52
- 239000008397 galvanized steel Substances 0.000 title claims abstract description 52
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 37
- 238000000137 annealing Methods 0.000 claims abstract description 17
- 238000005098 hot rolling Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000005097 cold rolling Methods 0.000 claims abstract description 10
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 7
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 6
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 6
- 239000000126 substance Substances 0.000 claims abstract description 6
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 5
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 238000005096 rolling process Methods 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 10
- 238000003723 Smelting Methods 0.000 claims description 9
- 238000002791 soaking Methods 0.000 claims description 7
- 238000009749 continuous casting Methods 0.000 claims description 6
- 238000005261 decarburization Methods 0.000 claims description 3
- 238000005246 galvanizing Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000010960 cold rolled steel Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
-
- 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
-
- 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
-
- 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
- C22C38/06—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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The invention belongs to the technical field of cold-rolled steel sheet production, and particularly relates to a hot-dip galvanized steel sheet and a production method thereof. The hot-dip galvanized steel sheet comprises the following chemical components: c: 0.0010-0.005%, Si: 0.01 to 0.04%, Mn: 0.10% -0.30%, P: less than or equal to 0.020%, S: less than or equal to 0.020%, Al: 0.010-0.080%, Ti: 0.01 to 0.060 percent, and the balance of Fe and inevitable impurities. The invention obviously reduces the implementation difficulty and the production cost of the hot-dip galvanized steel sheet production process by quantitatively designing the components of the hot-dip galvanized steel sheet and combining the control of hot rolling, cold rolling and annealing processes, and obtains the hot-dip galvanized steel sheet with excellent surface quality and excellent forming performance.
Description
Technical Field
The invention belongs to the technical field of cold-rolled steel sheet production, and particularly relates to a hot-dip galvanized steel sheet and a production method thereof.
Background
With the development of the automobile industry, representative patents for producing galvanized steel sheets with high strength and high formability required for automobile bodies by continuous annealing and excellent in formability include the following 2:
(1)200710048926.8 deep drawing finishing hot dip galvanized steel plate production method
The invention comprises the following components in percentage by weight: c: 0.003-0.006%,: 0.02-0.04%, and the hot rolling coiling temperature is 700-780 ℃, and the cold rolling annealing temperature is 780-880 ℃. The yield strength of the finished product is about 180MPa, the tensile strength is about 310MPa, the elongation is about 42.0 percent,
at a value of about 0.21, the amount of the active ingredient,
around 1.9.
(2)201210338992.X hot-dip galvanized steel plate for automobiles and production method thereof
The invention comprises the following components in percentage by weight: 0.001 to 0.003%, Si: less than or equal to 0.03%, Mn: 0.05-0.15%, P: less than or equal to 0.02 percent, S: 0.008-0.015%, Als: 0.02 to 0.07%, Ti: 0.05-0.09%, B: 0.0002 to 0.01 percent. The balance of Fe. The finished product has yield strength of about 160MPa, tensile strength of about 2870MPa, elongation of about 44.0 percent, r90 value of about 2.4 and n90 value of 0.24.
Although the hot-dip galvanized steel sheet can be produced by the method, the production process of the hot-dip galvanized steel sheet is difficult to implement, the production cost is high, and the large-scale production is not facilitated.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provides a hot-dip galvanized steel sheet with low implementation difficulty of the production process and low production cost and a production method thereof.
The technical scheme for solving the technical problems comprises the following steps: the hot dip galvanized steel sheet comprises the following chemical components: c, according to weight percentage: 0.0010-0.005%, Si: 0.01 to 0.04%, Mn: 0.10% -0.30%, P: less than or equal to 0.020%, S: less than or equal to 0.020%, Al: 0.010-0.080%, Ti: 0.01 to 0.060 percent, and the balance of Fe and inevitable impurities.
Furthermore, the yield strength of the hot-dip galvanized steel sheet is 130-160 MPa, the tensile strength is 270-300 MPa, the elongation is more than or equal to 45.0%, r90 is more than or equal to 2.6, and n90 is more than or equal to 0.25.
The production method of the hot dip galvanized steel sheet comprises the following steps:
performing smelting, continuous casting, hot rolling, cold rolling, hot galvanizing and annealing on the molten steel to obtain a hot galvanized steel plate; the hot rolling comprises the working procedures of heating, dephosphorization, rough rolling, finish rolling, laminar cooling and coiling.
Preferably, the molten steel smelting comprises molten steel desulphurization, converter smelting, LF furnace Ca treatment and RH decarburization.
Preferably, the molten steel is continuously cast into a continuous casting blank with the thickness of 200mm, and the thickness of an intermediate plate blank obtained after rough rolling is 33 mm-36 mm.
Preferably, the heating of the hot rolling is carried out in a heating furnace, and the heating process comprises the following steps: after charging, the temperature rises to 1200-1250 ℃ along with the furnace.
Preferably, the finish rolling temperature of the finish rolling is 890-950 ℃.
Preferably, after finish rolling, air cooling is carried out for 15-25 s, and then cooling is carried out to 680-720 ℃ by adopting a water cooling mode, and then coiling is carried out.
Preferably, the cold rolling reduction is 70-80%.
Preferably, in the annealing process, the annealing soaking temperature is 710-740 ℃, the soaking time is 6 hours, and the finishing elongation is 0.7-0.8%.
The invention has the beneficial effects that: the hot-dip galvanized steel sheet with excellent surface quality and excellent forming performance is obtained by quantitatively designing the components of the hot-dip galvanized steel sheet and combining the control of hot rolling, cold rolling and annealing processes.
Detailed Description
The invention provides a hot-dip galvanized steel sheet, which comprises the following chemical components: c: 0.0010-0.005%, Si: 0.01 to 0.04%, Mn: 0.10% -0.30%, P: less than or equal to 0.020%, S: less than or equal to 0.020%, Al: 0.010-0.080%, Ti: 0.01 to 0.060 percent, and the balance of Fe and inevitable impurities.
The hot dip galvanized steel sheet of the present invention further contains a small amount of silicon and phosphorus in order to improve the solid solution strengthening effect, purify recrystallized ferrite, promote pearlite transformation, and improve the anti-aging performance of the test steel.
Mn can improve strength as solid solution strengthening in a steel sheet, and can prevent hot cracking due to FeS by combining with sulfur to form MnS, but Mn content is too high to affect weldability of steel.
S is used as a residual element and is controlled to be less than or equal to 0.015 percent, aluminum is mainly added as a deoxidizing element, the content of the aluminum is required to be more than 0.010 percent to realize complete deoxidation, but the overhigh aluminum influences the welding performance of steel and the control of casting blank inclusions.
In conclusion, through the accurate control of various components, the hot-dip galvanized steel sheet with the production process implementation difficulty and the production cost is produced, the yield strength of the hot-dip galvanized steel sheet is 130-160 MPa, the tensile strength is 270-300 MPa, the elongation is more than or equal to 45.0%, r90 is more than or equal to 2.6, and n90 is more than or equal to 0.25.
The invention also provides a production method of the hot-dip galvanized steel plate, which comprises the following steps:
performing smelting, continuous casting, hot rolling, cold rolling, hot galvanizing and annealing on the molten steel to obtain a hot galvanized steel plate; the hot rolling comprises the working procedures of heating, dephosphorization, rough rolling, finish rolling, laminar cooling and coiling.
In the production method of the hot-dip galvanized steel sheet, the molten steel smelting comprises molten steel desulphurization, converter smelting, LF furnace Ca treatment and RH decarburization.
In the production method of the hot-dip galvanized steel plate, molten steel is continuously cast to form a continuous casting blank with the thickness of 200mm, and the thickness of an intermediate plate blank obtained after rough rolling is 33 mm-36 mm.
In the production method of the hot-dip galvanized steel sheet, hot rolling heating is carried out in a heating furnace, and the heating process comprises the following steps: after charging, the temperature rises to 1200-1250 ℃ along with the furnace.
In the production method of the hot-dip galvanized steel sheet, the finish rolling temperature of finish rolling is 890-950 ℃.
In the production method of the hot dip galvanized steel sheet, the hot dip galvanized steel sheet is finished in a fine rolling mode, is air-cooled for 15-25 s, is cooled to 680-720 ℃ in a water cooling mode, and is coiled, and a coreless transfer hot coil box is adopted in a coiling mode.
Wherein in the production method of the hot-dip galvanized steel sheet, the cold rolling reduction rate is 70-80%
In the production method of the hot-dip galvanized steel sheet, during the annealing process, the annealing soaking temperature is 710-740 ℃, the soaking time is 6 hours, and the finishing elongation is 0.7-0.8%.
In conclusion, the invention obviously reduces the implementation difficulty and the production cost of the production process of the hot-dip galvanized steel sheet by quantitatively designing the components of the hot-dip galvanized steel sheet and combining the control of hot rolling, cold rolling and annealing processes, and obtains the hot-dip galvanized steel sheet with excellent surface quality and excellent forming performance.
The following examples are intended to illustrate specific embodiments of the present invention without limiting the scope of the invention to the examples.
Examples
The invention provides a production method of a hot-dip galvanized steel sheet, which comprises the following steps:
(1) the chemical composition is shown in table 1.
TABLE 1 chemical composition
| C | Si | Mn | P | S | Ti | Als | |
| Example 1 | 0.002 | 0.01 | 0.20 | 0.011 | 0.013 | 0.053 | 0.048 |
| Example 2 | 0.002 | 0.01 | 0.20 | 0.010 | 0.012 | 0.058 | 0.050 |
| Comparative example 1 | 0.004 | 0.02 | 0.24 | 0.015 | 0.015 | 0.030 | 0.041 |
| Comparative example 2 | 0.004 | 0.02 | 0.23 | 0.014 | 0.015 | 0.041 | 0.043 |
(2) The hot rolling process parameters are shown in table 2 below:
TABLE 2 Hot Rolling Main Process parameters
(3) The annealing process parameters are shown in Table 3
TABLE 3 main Process parameters for annealing
| Number of | Annealing temperature/. degree.C | Soaking time/h | Percent of the finished elongation |
| Example 1 | 730 | 6 | 0.70 |
| Example 2 | 740 | 6 | 0.71 |
| Comparative example 1 | 755 | 5 | 0.83 |
| Comparative example 2 | 765 | 5 | 0.89 |
(4) The mechanical properties of the hot dip galvanized steel sheet produced by the process are shown in the following table 4:
TABLE 4 mechanical Properties of hot-dip galvanized steel sheets
| Numbering | Rp0.2/MPa | Rm/MPa | Elongation A80/％ | n90 | r90 |
| Example 1 | 143 | 290 | 46.5 | 0.25 | 2.7 |
| Example 2 | 140 | 281 | 46.0 | 0.26 | 2.6 |
| Comparative example 1 | 172 | 320 | 41.0 | 0.23 | 2.3 |
| Comparative example 2 | 165 | 321 | 41.5 | 0.23 | 2.4 |
Claims (10)
1. A hot-dip galvanized steel sheet characterized by comprising the following chemical components: c, according to weight percentage: 0.0010-0.005%, Si: 0.01 to 0.04%, Mn: 0.10% -0.30%, P: less than or equal to 0.020%, S: less than or equal to 0.020%, Al: 0.010-0.080%, Ti: 0.01 to 0.060 percent, and the balance of Fe and inevitable impurities.
2. The hot-dip galvanized steel sheet according to claim 1, wherein: the yield strength of the hot-dip galvanized steel sheet is 130-160 MPa, the tensile strength is 270-300 MPa, the elongation is more than or equal to 45.0%, r90 is more than or equal to 2.6, and n90 is more than or equal to 0.25.
3. A method for producing a hot-dip galvanized steel sheet according to claim 1 or 2, characterized by comprising the steps of:
performing smelting, continuous casting, hot rolling, cold rolling, hot galvanizing and annealing on the molten steel to obtain a hot galvanized steel plate; the hot rolling comprises the working procedures of heating, dephosphorization, rough rolling, finish rolling, laminar cooling and coiling.
4. The method for producing a hot-dip galvanized steel sheet according to claim 3, characterized in that: the molten steel smelting comprises molten steel desulphurization, converter smelting, LF furnace Ca treatment and RH decarburization.
5. A method for producing a hot-dip galvanized steel sheet according to claim 3, characterized by comprising: the molten steel is continuously cast into a continuous casting blank with the thickness of 200mm, and the thickness of an intermediate plate blank obtained after rough rolling is 33 mm-36 mm.
6. A method for producing a hot-dip galvanized steel sheet according to claim 3, characterized by comprising: the heating of hot rolling is carried out in a heating furnace, and the heating process comprises the following steps: after charging, the temperature rises to 1200-1250 ℃ along with the furnace.
7. A method for producing a hot-dip galvanized steel sheet according to claim 3, characterized by comprising: the finish rolling temperature of finish rolling is 890-950 ℃.
8. A method for producing a hot-dip galvanized steel sheet according to claim 3, characterized by comprising: and after finish rolling, air cooling for 15-25 s, cooling to 680-720 ℃ by adopting a water cooling mode, and then coiling.
9. A method for producing a hot-dip galvanized steel sheet according to claim 3, characterized by comprising: the cold rolling reduction rate is 70-80%.
10. A method for producing a hot-dip galvanized steel sheet according to any one of claims 3 to 9, characterized by comprising: in the annealing process, the annealing soaking temperature is 710-740 ℃, the soaking time is 6 hours, and the finishing elongation is 0.7-0.8%.
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| CN202210416940.3A CN114737126A (en) | 2022-04-20 | 2022-04-20 | Hot-dip galvanized steel sheet and method for producing same |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104593674A (en) * | 2015-01-21 | 2015-05-06 | 首钢总公司 | Hot-dip galvanized ultra-low carbon bake-hardening steel and production method thereof |
| CN107739981A (en) * | 2017-10-23 | 2018-02-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Baking hardening hot-dip galvanizing sheet steel and preparation method thereof |
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- 2022-04-20 CN CN202210416940.3A patent/CN114737126A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104593674A (en) * | 2015-01-21 | 2015-05-06 | 首钢总公司 | Hot-dip galvanized ultra-low carbon bake-hardening steel and production method thereof |
| CN107739981A (en) * | 2017-10-23 | 2018-02-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Baking hardening hot-dip galvanizing sheet steel and preparation method thereof |
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