CN107747033A - Baking hardening hot-dip galvanizing sheet steel of excellent shaping and preparation method thereof - Google Patents
Baking hardening hot-dip galvanizing sheet steel of excellent shaping and preparation method thereof Download PDFInfo
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- CN107747033A CN107747033A CN201710996044.8A CN201710996044A CN107747033A CN 107747033 A CN107747033 A CN 107747033A CN 201710996044 A CN201710996044 A CN 201710996044A CN 107747033 A CN107747033 A CN 107747033A
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- hot
- dip galvanizing
- sheet steel
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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
-
- 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
- C21D1/26—Methods of annealing
-
- 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
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
-
- 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
- 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
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
Abstract
The invention belongs to steel plate manufacturing technology field, and in particular to a kind of hot-dip galvanizing sheet steel and preparation method thereof.For existing method prepare hot-dip galvanizing sheet steel mechanical property it is not good enough, extension property is bad the problems such as, the invention provides a kind of hot-dip galvanizing sheet steel and preparation method thereof, the chemical composition of hot-dip galvanizing sheet steel of the present invention is：C by weight percentage：0.04~0.08%, Si：0.01~0.04%, Mn：0.10~0.40%, P：≤ 0.020%, S：≤ 0.015%, Als：0.015~0.050%, B：0.0010~0.0040% surplus is Fe and inevitable impurity.Its preparation method is：By smelting molten steel after smelting hot rolling acid and rolling galvanizing annealing operation, hot-dip galvanizing sheet steel is obtained.Hot-dip galvanizing sheet steel yield strength prepared by the present invention is 220~250MPa, tensile strength is 320~380MPa, elongation percentage >=36.0%, n90 >=0.18, r90 >=1.5, BH >=30MPa, mechanical property and processability are excellent, disclosure satisfy that automobile exterior panel user's requirement.
Description
Technical field
The invention belongs to hot-dip galvanizing sheet steel production technical field, and in particular to a kind of baking hardening galvanizing of excellent shaping
Steel plate and preparation method thereof.
Background technology
Baking hardening hot-dip galvanizing sheet steel is widely used in auto parts, not only require excellent stamping formabilily and
Appearance quality, while it is also desirable to have certain dent resistance and hardness energy and can be toasted, to reduce making an uproar for process of running at high speed
Sound.Production technology about baking hardening steel plate has：
CN 103228808B provide a kind of baking hardenability, room temperature ageing and deep drawing excellent in workability and face
The small high intensity baking hardening type cold rolled plate of interior anisotropy, composition is by C:0.0010~0.0040%, Si:0.005~
0.05%th, Mn:0.1~0.8%, P:0.01~0.07%, S:0.001~0.01%, Al:0.01~0.08%, N:0.0010
~0.0050%, Nb:0.002~0.020% and Mo：0.005~0.050%, [Mn%]/[P%] be more than 1.6 and 45 with
Under, it is more than 0.0005% and less than 0.0025% by [C%]-(12/93) × [Nb%] the solid solution C tried to achieve amount, by X
(222)/texture controlling of { X (110)+X (200) } >=3.0, can obtain less anisotropy, tensile strength 300~450MPa baking
Roasting hardening cold rolled steel sheet.The invention adds the alloying elements such as P, Nb, Mo, and alloying component is higher, while to members such as each C, N, Mn, P, Nb
Element, which has, associates control requirement, and actual smelt controls difficulty big.
CN 1090246C provide a kind of cold-rolled steel sheet of excellent in baking hardenability, including the extremely low carbon containing Ti and/or Nb
Steel, and the baking hardened steel of the B containing specified quantitative, its composition are C:0.0013~0.0070%, Si:0.001~0.08%, Mn:
0.01~0.9%, P:0.01~0.10%, S:Less than 0.03%, Al:0.001~0.1%, N:Less than 0.01%, Nb:0.001
~0.040% and Ti：0.001~0.025%, baking hardening value can be obtained in more than 50MPa.The patent of invention only relates to dry
Roasting hardening and ageing resistance, are not provided to other performance, while association has been carried out to C, N, Nb, Ti, Mo, B in composition and has been limited,
Actual smelt controls difficulty big.
CN101994056B is related to a kind of ultra-low carbon baking hardening steel plate with excellent punching performance, and based component is：C:
0.0010~0.0030%, Si:0.035~0.065%, Mn:0.10~0.17%, P:0.015~0.025%, S≤
0.010%th, Al:0.015~0.045%, N≤0.0030%, Ti：0.007~0.014%, wherein [C%]/[Ti%] is controlled
0.8~1.2.By 920~945 DEG C of finish to gauges, 75~85% cold rolling reduction ratio cold rollings, last continuous annealing, can be surrendered
171~235MPa of intensity, 302~322MPa of tensile strength, elongation after fracture 43.5~47%, r values 2.26~2.58, n values
35~58MPa of 0.22~0.24, BH value.The invention is only with Trace Titanium Treatment, and cost of alloy is relatively low, but its low cross-intensity
(being less than 340MPa).
CN201280047553.1 discloses a kind of high-strength hot-dip galvanized steel sheet of excellent in baking hardenability, its composition
For：C：0.075~0.400%, Si：0.01~2.00%, Mn：0.80~3.50%, P：0.0001~0.100%, S：
0.0001~0.0100%, Al：0.001~2.00%, N：0.0001~0.0100%, O：0.0001~0.0100%.The hair
Bright is high carbon high manganese steel, can not meet higher deep drawability.
Though the above method can be prepared hot-dip galvanizing sheet steel, the yield strength and tensile strength of hot-dip galvanizing sheet steel all compared with
Low, mechanical property is not good enough.
The content of the invention
The technical problem to be solved in the present invention is：Existing method prepare hot-dip galvanizing sheet steel mechanical property is not good enough, extensibility
Can be bad, cost is high the problems such as.
The present invention solve above-mentioned technical problem technical scheme be：A kind of baking hardening hot-galvanized steel of excellent shaping is provided
Plate and preparation method thereof, the hot-dip galvanizing sheet steel yield strength is 220~250MPa, tensile strength is 320~380MPa, elongation percentage
>=36.0%, n90 >=0.18, r90 >=1.5, BH >=30MPa, workable, cost is low.
The invention provides a kind of baking hardening hot-dip galvanizing sheet steel of excellent shaping, its chemical composition is：Percentage by weight
Than meter, C：0.04~0.08%, Si：0.01~0.04%, Mn：0.10~0.40%, P：≤ 0.020%, S：≤ 0.015%,
Als：0.015~0.050%, B：0.0010~0.0040% surplus is Fe and inevitable impurity.
Wherein, in the baking hardening hot-dip galvanizing sheet steel of above-mentioned excellent shaping, the yield strength of the steel plate for 220~
250MPa, tensile strength are 320~380MPa, elongation percentage >=36.0%, n90 >=0.18, r90 >=1.5, BH >=30MPa.
Present invention also offers a kind of preparation method of the baking hardening hot-dip galvanizing sheet steel of above-mentioned excellent shaping, including it is following
Step：
Smelting molten steel is rolled through smelting-hot rolling-acid-galvanizing-annealing operation after, obtain hot-dip galvanizing sheet steel；The hot rolling
Including heating, dephosphorization, roughing, finish rolling, section cooling and coiling process.
Wherein, in the preparation method of the baking hardening hot-dip galvanizing sheet steel of above-mentioned excellent shaping, finish rolling open rolling in the hot rolling
Temperature is 1100~1250 DEG C, and finishing temperature is 880~960 DEG C.
Wherein, in the preparation method of the baking hardening hot-dip galvanizing sheet steel of above-mentioned excellent shaping, coiling temperature in the hot rolling
For 650~750 DEG C.
Wherein, in the preparation method of the baking hardening hot-dip galvanizing sheet steel of above-mentioned excellent shaping, the acid rolls cold rolling in process
Reduction ratio is 50~80%.
Wherein, in the preparation method of the baking hardening hot-dip galvanizing sheet steel of above-mentioned excellent shaping, the annealing operation is specially：
440~470 DEG C, zinc-plated 7~30s, then the speed with 5~10 DEG C/s are cooled to from 780~850 DEG C of speed with 10~50 DEG C/s
It is cooled to room temperature eventually.
Wherein, in the preparation method of the baking hardening hot-dip galvanizing sheet steel of above-mentioned excellent shaping, protective atmosphere dew point temperature in stove
Spend for -25~-60 DEG C.
Compared with prior art, beneficial effects of the present invention are：
The invention provides a kind of baking hardening hot-dip galvanizing sheet steel of excellent shaping, by strictly controlling the gaps such as C, N former
Son, especially to Si, Mn content quantitative composition design, does not add titanium, with reference to distinctive rolling and company to ensure that steel is pure
Continuous annealing hot dip galvanizing process, is prepared the excellent hot-dip galvanizing sheet steel of a kind of excellent surface quality, forming property.The steel plate is bent
Take intensity be 220~250MPa, tensile strength is 320~380MPa, elongation percentage >=36.0%, n90 >=0.18, r90 >=1.5,
It BH >=30MPa, can ensure that tensile strength and elongation percentage meet automobile exterior panel user's requirement simultaneously, develop a kind of new
Automobile using hot-dip galvanizing sheet steel.
Embodiment
The invention provides a kind of baking hardening hot-dip galvanizing sheet steel of excellent shaping, its chemical composition is：Percentage by weight
Than meter, C：0.04~0.08%, Si：0.01~0.04%, Mn：0.10~0.40%, P：≤ 0.020%, S：≤ 0.015%,
Als：0.015~0.050%, B：0.0010~0.0040% surplus is Fe and inevitable impurity.
Carbon：C determines the intensity, plasticity and forming property of steel plate.C is that solid solution strengthening effect is most obvious in ferrous materials
Element, C content increase by 0.1% is dissolved in steel, its intensity can improve about 450MPa.When C content is too low, cause low strength, steel
In general be not less than 0.02%；When C content is too high, the plasticity and welding performance of steel decline, and 0.15% is generally not more than in steel.Cause
This, C content of the present invention is 0.04~0.08%.
Silicon：Si can be solid-solution in the intensity that steel is improved in ferrite and austenite, and its effect is only second to C, P, compared with Mn, Cr, Ti
It is strong with the element such as Ni；Si can also suppress the precipitation of carbide in ferrite, solid solution C atoms is fully enriched with into austenite,
So as to improve its stability.However, during Si too high levels, the scale on surface that Si is formed in heating furnace is very difficult to remove, and increases
Dephosphorization difficulty is added；SiO2 easily is formed to surface enrichment in annealing process simultaneously, so as to cause the surface defects such as plating leakage.Cause
This, Si contents of the present invention are 0.01~0.04%.
Manganese：Mn is the solution strengthening element commonly used in good deoxidier and desulfurizing agent, and steel, and Mn can both be combined with C
Form a variety of carbide and play a part of precipitation strength, also dissolving in strengthens solid solution strengthening effect in matrix.Mn easily with S combination shapes
Into high melting compound MnS, so as to eliminate or weaken the hot-short phenomenon caused by FeS, improve the hot-working character of steel.Mn can
To improve stabilization of austenite, move to right C curve, so as to significantly reduce the critical cooling rate of martensite.But Mn too high levels
When, to surface enrichment easily in annealing process, a large amount of manganese compounds are formed, so as to cause surface galvanizing quality to decline.Therefore, at this
Mn contents are 0.10~0.40% in invention.
Aluminium：Al is deoxidier common in steel, while can form AlN pinning crystal boundaries, so as to play the work of crystal grain thinning
With；In addition, Al is similar to Si effects, Carbide Precipitation can be suppressed, so that the fully rich carbon of austenite.Therefore, in the present invention
Al content is 0.015~0.050%.
In summary, by the accurate control to various composition, intensity has been prepared in the present invention and forming property is excellent
Baking hardening hot-dip galvanizing sheet steel, the steel plate yield strength is 220~250MPa, tensile strength is 320~380MPa, elongation percentage
>=36.0%, n90 >=0.18, r90 >=1.5, BH >=30MPa.
Present invention also offers a kind of preparation method of the baking hardening hot-dip galvanizing sheet steel of above-mentioned excellent shaping, including it is following
Step：
Smelting molten steel is rolled through smelting-hot rolling-acid-galvanizing-annealing operation after, obtain hot-dip galvanizing sheet steel；The hot rolling
Including heating, dephosphorization, roughing, finish rolling, section cooling and coiling process.
Wherein, in the preparation method of the baking hardening hot-dip galvanizing sheet steel of above-mentioned excellent shaping, in order to prevent hot-rolled process from producing
Raw upwarping defect, while ensure the temperature of high temperature coiling, finish rolling start rolling temperature is 1100~1250 DEG C in the hot rolling, finish to gauge temperature
Spend for 880~960 DEG C.
Wherein, in the preparation method of the baking hardening hot-dip galvanizing sheet steel of above-mentioned excellent shaping, in order to which hot-rolled process is closed
Suitable ferrite and pearlite tissue, coiling temperature is 650~750 DEG C in the hot rolling.
Wherein, in the preparation method of the baking hardening hot-dip galvanizing sheet steel of above-mentioned excellent shaping, the acid rolls cold rolling in process
Reduction ratio is 50~80%.
Wherein, in the preparation method of the baking hardening hot-dip galvanizing sheet steel of above-mentioned excellent shaping, the annealing operation is specially：
440~470 DEG C, zinc-plated 7~30s, then the speed with 5~10 DEG C/s are cooled to from 780~850 DEG C of speed with 10~50 DEG C/s
It is cooled to room temperature eventually.
Wherein, in the preparation method of the baking hardening hot-dip galvanizing sheet steel of above-mentioned excellent shaping, protective atmosphere in stove when zinc-plated
Dew-point temperature is -25~-60 DEG C.
Explanation will be further explained to the embodiment of the present invention by embodiment below, but do not indicated that this
The protection domain of invention is limited in described in embodiment in scope.
Embodiment 1-3 prepares hot-dip galvanizing sheet steel with the inventive method
Concrete operation step is as follows：
(1) pass through common smelting process, be prepared for the baking hardening plate slab of chemical composition as shown in table 1 below：
The baking hardening hot-dip galvanizing sheet steel chemical composition (wt.%) of 1 excellent shaping of table
| Numbering | C | Si | Mn | P | S | Als | B |
| 1 | 0.06 | 0.02 | 0.21 | 0.007 | 0.007 | 0.034 | 0.0028 |
| 2 | 0.08 | 0.02 | 0.30 | 0.013 | 0.005 | 0.029 | 0.0032 |
| 3 | 0.05 | 0.01 | 0.026 | 0.009 | 0.006 | 0.046 | 0.0029 |
(2) above-mentioned slab is obtained into hot rolled coil after heating, dephosphorization, hot rolling and section cooling, wherein each parameter setting
For shown in table 2 below：
The hot rolling main technologic parameters of table 2
| Numbering | Heating-up temperature/DEG C | Final rolling temperature/DEG C | Finishing temperature/DEG C | Coiling temperature/DEG C | Hot rolled thickness/mm |
| 1 | 1220 | 1040 | 880~910 | 650~700 | 3.00 |
| 2 | 1200 | 1050 | 920~950 | 720~750 | 4.25 |
| 3 | 1205 | 1065 | 930~960 | 700~730 | 5.25 |
(3) Thin Strip Steel after hot rolled coil pickling, will be cold rolled to, wherein 1#, 2# and 3# cold rolling reduction ratio is respectively 76.7%,
64.7% and 61.9%.
(4) galvanizing, annealing, the hot dip galvanizing annealing process parameter such as institute of table 3 are carried out to the Thin Strip Steel obtained in step (3)
Show：
The galvanizing of table 3 annealing main technologic parameters
| Numbering | Annealing temperature/DEG C | Rapid cooling speed/DEG C/s | The zinc-plated time/s | Whole cooling rate rate/DEG C/s |
| 1 | 796 | 30 | 10 | 4.5 |
| 2 | 823 | 35 | 15 | 7.0 |
| 3 | 845 | 45 | 25 | 8.5 |
(5) the baking hardening hot-dip galvanizing sheet steel of the excellent shaping prepared through above-mentioned technique, its mechanical property such as table 4 below institute
Show：
The baking hardening hot-dip galvanizing sheet steel mechanical property of 4 excellent shaping of table
From the result of Examples 1 and 2：The baking hardening hot-dip galvanizing sheet steel of excellent shaping prepared by the present invention has good
Good mechanical property, its yield strength is 220~250MPa, tensile strength is 320~380MPa, elongation percentage >=36.0%, n90
>=0.18, r90 >=1.5, BH >=30MPa, it disclosure satisfy that automobile exterior panel user's requirement.The invention provides a kind of brand-new
Hot-dip galvanizing sheet steel, its excellent performance, cost is cheap, has obvious economic benefit.
Claims (8)
1. the baking hardening hot-dip galvanizing sheet steel of excellent shaping, it is characterised in that chemical composition is：C：0.04~0.08%, Si：
0.01~0.04%, Mn：0.10~0.40%, P：≤ 0.020%, S：≤ 0.015%, Als：0.015~0.050%, B：
0.0010~0.0040% surplus is Fe and inevitable impurity.
2. the baking hardening hot-dip galvanizing sheet steel of excellent shaping according to claim 1, it is characterised in that：Hot-dip galvanizing sheet steel
Yield strength is 220~250MPa, tensile strength is 320~380MPa, elongation percentage >=36.0%, n90 >=0.18, r90 >=
1.5、BH≥30MPa。
3. the preparation method of the baking hardening hot-dip galvanizing sheet steel of the excellent shaping described in claim 1 or 2, it is characterised in that bag
Include following steps：
Smelting molten steel is rolled through smelting-hot rolling-acid-galvanizing-annealing operation after, obtain hot-dip galvanizing sheet steel；The hot rolling includes
Heating, dephosphorization, roughing, finish rolling, section cooling and coiling process.
4. the preparation method of the baking hardening hot-dip galvanizing sheet steel of excellent shaping according to claim 3, it is characterised in that：Institute
It is 1100~1250 DEG C to state finish rolling start rolling temperature in hot rolling, and finishing temperature is 880~960 DEG C.
5. the preparation method of the baking hardening hot-dip galvanizing sheet steel of excellent shaping according to claim 3, it is characterised in that：Institute
It is 650~750 DEG C to state coiling temperature in hot rolling.
6. the preparation method of the baking hardening hot-dip galvanizing sheet steel of excellent shaping according to claim 3, it is characterised in that：Institute
It is 50~80% to state acid to roll cold rolling reduction ratio in process.
7. the preparation method of the baking hardening hot-dip galvanizing sheet steel of excellent shaping according to claim 3, it is characterised in that：Institute
Stating annealing operation is specially：440~470 DEG C, zinc-plated 7~30s are cooled to from 780~850 DEG C of speed with 10~50 DEG C/s, then
Room temperature is cooled to 5~10 DEG C/s speed eventually.
8. the preparation method of the baking hardening hot-dip galvanizing sheet steel of excellent shaping according to claim 3, it is characterised in that：Institute
Protective atmosphere dew-point temperature is -25~-60 DEG C in stove when stating galvanizing.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109252109A (en) * | 2018-10-19 | 2019-01-22 | 首钢集团有限公司 | A kind of low-carbon baking hardened steel and its production method |
| CN111455259A (en) * | 2020-04-22 | 2020-07-28 | 马鞍山钢铁股份有限公司 | Hot-rolled pickled steel plate for electrogalvanizing and production method thereof |
| CN112553537A (en) * | 2019-09-25 | 2021-03-26 | 上海梅山钢铁股份有限公司 | Cold-rolled hot-dip galvanized steel sheet with yield strength of 240MPa and manufacturing method thereof |
| CN115505817A (en) * | 2021-06-07 | 2022-12-23 | 上海梅山钢铁股份有限公司 | Production method of low-thickness low-carbon B-containing hot rolled steel plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1890397A (en) * | 2003-12-19 | 2007-01-03 | 杰富意钢铁株式会社 | Method for producing alloyed zinc hot dip galvanized steel sheet |
| CN105603325A (en) * | 2016-03-23 | 2016-05-25 | 攀钢集团攀枝花钢铁研究院有限公司 | 600MPa-level vanadium-containing hot-galvanizing dual-phase steel and preparation method thereof |
-
2017
- 2017-10-23 CN CN201710996044.8A patent/CN107747033A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1890397A (en) * | 2003-12-19 | 2007-01-03 | 杰富意钢铁株式会社 | Method for producing alloyed zinc hot dip galvanized steel sheet |
| CN105603325A (en) * | 2016-03-23 | 2016-05-25 | 攀钢集团攀枝花钢铁研究院有限公司 | 600MPa-level vanadium-containing hot-galvanizing dual-phase steel and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109252109A (en) * | 2018-10-19 | 2019-01-22 | 首钢集团有限公司 | A kind of low-carbon baking hardened steel and its production method |
| CN112553537A (en) * | 2019-09-25 | 2021-03-26 | 上海梅山钢铁股份有限公司 | Cold-rolled hot-dip galvanized steel sheet with yield strength of 240MPa and manufacturing method thereof |
| CN111455259A (en) * | 2020-04-22 | 2020-07-28 | 马鞍山钢铁股份有限公司 | Hot-rolled pickled steel plate for electrogalvanizing and production method thereof |
| CN115505817A (en) * | 2021-06-07 | 2022-12-23 | 上海梅山钢铁股份有限公司 | Production method of low-thickness low-carbon B-containing hot rolled steel plate |
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Application publication date: 20180302 |