CN109321828A - 1600 MPa-grade cold-rolled martensitic steel and production method thereof - Google Patents
1600 MPa-grade cold-rolled martensitic steel and production method thereof Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 54
- 239000010959 steel Substances 0.000 title claims abstract description 54
- 229910000734 martensite Inorganic materials 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000005097 cold rolling Methods 0.000 claims abstract description 18
- 238000005098 hot rolling Methods 0.000 claims abstract description 14
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 9
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 9
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 8
- 238000005096 rolling process Methods 0.000 claims abstract description 8
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 8
- 238000000137 annealing Methods 0.000 claims abstract description 7
- 238000009749 continuous casting Methods 0.000 claims abstract description 7
- 238000005554 pickling Methods 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 238000003723 Smelting Methods 0.000 claims abstract description 4
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 238000005496 tempering Methods 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000010791 quenching Methods 0.000 claims description 7
- 230000000171 quenching effect Effects 0.000 claims description 7
- 230000009467 reduction Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 239000010960 cold rolled steel Substances 0.000 abstract description 2
- 239000010970 precious metal Substances 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000004615 ingredient Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 229910052759 nickel Inorganic materials 0.000 description 6
- 229910052719 titanium Inorganic materials 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 229910052804 chromium Inorganic materials 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- 241001062472 Stokellia anisodon Species 0.000 description 4
- 229910052758 niobium Inorganic materials 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 238000005275 alloying Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- 238000002791 soaking Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 229910001567 cementite Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material 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
- C22C38/02—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
- C21D1/18—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
- C21D8/0221—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
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0236—Cold 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
- C22C38/04—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
- 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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- 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
本发明提供了一种1600MPa级冷轧马氏体钢及其生产方法，该钢板的成分按重量百分比计如下：C：0.23％～0.28％、Si：0.5％～1.0％、Mn：1.8％～2.3％、Al：0.02％～0.07％、P：≤0.02％、S：≤0.005％、N：≤0.005％，余量为Fe及不可避免的杂质。生产方法，包括冶炼→连铸→热轧→酸洗→冷轧→连续退火；本发明设计的化学成分简单，除C、Si、Mn外未添加任何稀有或贵金属元素，属于低成本经济型产品，采用本发明所提供的成分设计和生产方法，可以制造出抗拉强度大于1600MPa，延伸率大于5％的超高强度冷轧钢板，可用于辊压加工汽车行业需求的高强度车身零部件。
The invention provides a 1600MPa grade cold-rolled martensitic steel and a production method thereof. The composition of the steel plate in terms of weight percentage is as follows: C: 0.23%-0.28%, Si: 0.5%-1.0%, Mn: 1.8%- 2.3%, Al: 0.02% to 0.07%, P: ≤ 0.02%, S: ≤ 0.005%, N: ≤ 0.005%, and the balance is Fe and inevitable impurities. The production method includes smelting→continuous casting→hot rolling→pickling→cold rolling→continuous annealing; the chemical composition designed by the invention is simple, no rare or precious metal elements are added except C, Si and Mn, and it belongs to a low-cost economical product , By using the composition design and production method provided by the present invention, an ultra-high-strength cold-rolled steel sheet with a tensile strength greater than 1600 MPa and an elongation greater than 5% can be manufactured, which can be used for rolling processing of high-strength body parts required by the automobile industry.
Description
Technical field
The invention belongs to the economical cold rolling horses that metal material field more particularly to a kind of tensile strength are greater than 1600MPa
Family name's body steel plate and its production method.
Background technique
In recent years, along with the fast development of automotive light weight technology trend, advanced high-strength steel product and advanced forming technique
Application in automobile industry dramatically increases.Martensite steel (MS-Martensitic Steel) is that current commercialization is high-intensitive
The highest steel grade of intensity rank in steel plate is mainly changed into lath martensite group by high temperature austenitic body tissue rapid quenching
It knits, can be realized by hot rolling, cold rolling.Quenched martensite tissue need to carry out tempering to improve its plasticity, make it such
Under high intensity, still there is enough forming properties.Usual martensite steel can only be produced with rolling formation or punching press simple shape
Part, be mainly used for the parts such as the not high side door beams of forming requirements with replace tubular member, reduce manufacturing cost.
" a kind of low cost ultra-high strength and toughness martensite steel and its manufacturing method " (publication number: CN101586217B) discloses
Martensite steel composition range is as follows, C:0.4%-0.6%, Si:1.4%-1.6%, Mn:1.6%-1.8%, Cr:0.5%-
0.7%, Ni:0.2%-0.4%, Al:0.06%-0.09%, N:0.01%-0.04%, Ti:0.01%-0.03%, Nb:
0.02%-0.06%, S :≤0.01%, P :≤0.01%.The patent is using the side such as refined crystalline strengthening, precipitation strength, precipitation strength
Method controls in conjunction with retained austenite, improves the plasticity of high strength steel, produces the martensite that tensile strength is greater than 2000MPa
Steel, product type belong to hot rolling material.In alloying component, although it has fully considered the effect of cheap microelement, reduce dilute
There is a dosage of alloying element, but still different degrees of is added to the alloying elements such as Cr, Ni, Ti, Nb；Preparation method include smelt,
Casting, forging or rolling, with water quenching, tempering, and cast after also need carry out electro-slag continuous casting remelting, environmental pollution is serious, cost
Increase larger.
The super-high strength steel that " a kind of lonneal martensite unimach " (publication number: CN103147020A) discloses
Study and be divided into, C:0.35%-0.45%, Ni:3%-6%, Co:2%-5%, Si:1.5%-2.5%, Mn:1.5%-2.5%,
Cr:0.5%-1.25%, Mo:0.5%-2.0%, Nb:0.01%-0.05%, Ti:0.01%-0.03%, simultaneously require S≤
0.005%, P≤0.005%, O≤20PPm, N≤20PPm, manufacturing method are smelting, hot-working, heat treatment, and product is hot rolling
Material.The invention increases the content of Ni and Co element on the basis of lonneal steel, has adjusted Si and Mn constituent content, and multiple
It closes and Nb and Ti control of element crystallite dimension is added, and then develop with superelevation tensile strength and high fracture toughness, yield tensile ratio
Low martensite steel.The rare alloys constituent content such as Ni, Co of the patented product is higher, it is big to smelt production difficulty, and manufactured
Cheng Zhongxu carries out homogenize process, sofening treatment and solution treatment, and production technology is complicated.
The martensite steel that " a kind of low carbon martensite steel plate and its manufacturing method " (publication number: CN102234743A) discloses
The chemical component of plate is C:0.12%-0.20%, Si:0.20%-0.55%, Mn:1.10%-1.60%, P≤0.025%, S
≤ 0.015%, Cr :≤0.90%, Mo :≤0.50%, V :≤0.060%, Cu :≤0.02%, Ni :≤0.03%, B:
0.001%-0.003%, Ti :≤0.025%, N≤0.01%, Al:0.015%-0.050% pass through reasonable ingredient and work
Skill design can produce tensile strength greater than 1100MPa, and yield strength is greater than 990MPa, and surface hardness HBW is greater than 360 height
The wear-resisting martensite steel plate of intensity.Manufacturing method is smelting, continuous casting, hot rolling, quenching, tempering, and product is still hot rolling material.In order to improve
Its wearability, be added in ingredient Cr, Mo of different content, Cu, V, B, Ti, etc. elements, cost of alloy it is higher；In order to improve weldering
Performance is connect, the C content in invention is lower, therefore in martensite steel, strength level is lower.
The presently disclosed invention about super-strength martensitic steel is mostly hot-rolled product, and it is high-strength to can be used for automobile industry
The cold-rolled products for spending vehicle body parts manufacture are then very little.The main reason for causing this phenomenon may be to guarantee high intensity
Martensitic structure needs to change by high temperature austenitic body tissue rapid quenching to obtain, it is therefore desirable to which continuous annealing production equipment has pole
Strong cooling capacity (press quenching ability), it is also desirable to which online tempering improves plasticity.It is produced in view of martensite steel
To the rigors of capacity of equipment, it is able to produce cold-rolled products, the especially above product of 1300MPa intensity rank in the world at present
Iron and steel enterprise it is very few, domestic main research and development and production unit are only Baosteel and Anshan iron and steel plant.
Summary of the invention
It is an object of the invention to overcome the above problem and insufficient and provide a kind of tensile strength and be greater than 1600MPa, extend
Low cost economical 1600MPa grade cold rolling martensite steel and its production method of the rate greater than 5%.
What the object of the invention was realized in:
A kind of 1600MPa grades of cold rolling martensite steel, the ingredient of the steel are as follows by weight percentage: C:0.23%~
0.28%, Si:0.5%~1.0%, Mn:1.8%~2.3%, Al:0.02%-~0.07%, P :≤0.02%, S :≤
0.005%, N :≤0.005%, surplus is Fe and inevitable impurity.
It is as follows that present component designs reason:
C:C is one of most important intensified element in steel, plays the role of improving martensite hardness in the present invention, to steel
Plate intensity effect is significant.Phosphorus content is too low, and martensite hardness decline, intensity is unable to satisfy requirement.Carbon content is excessively high, the modeling of steel plate
Property decline, welding performance be deteriorated.Therefore the present invention claims C contents between 0.23%~0.28%.
Si:Si is non-carbide forming element, has and inhibits Carbide Precipitation, delays carbide to cementite transformation, resistance
The only effect of Carbide Coarsening is conducive to the hardness that martensite is kept in drawing process.Si is easy to be enriched with shape in surface of steel plate
At oxidation film, too high levels will lead to surface quality decline, while influence plasticity and welding performance.Therefore the Si in the present invention contains
Amount is 0.5~1.0%.
Mn:Mn is one of effective solution strengthening element, and harden ability is had a significant impact, and can promote the shape of martensite
At effectively improving the intensity of steel.Mn is easy segregation in steel, forms banded structure, is unfavorable for the uniformity of tissue.Therefore this hair
The Mn content of bright selection is in 1.8%~2.3% range.
Al:Al plays deoxidation and Grain refinement in steel, and too high levels are unfavorable for continuous casting, therefore the present invention wants
Ask Al content between 0.02%~0.07%.
P, S, N:P, S, N are relict element, and P easily causes cyrystal boundary segregation, and there are secondary processing brittleness, are unfavorable for steel plate
Hot-working and weldability；S easily forms non-metallic inclusion with Mn, makes the clod wash and the decline of reaming performance of steel plate；N is that gap is former
Son easily makes steel plate yield point elongation occur when stretching, formability is caused to decline.Therefore three should try to control in reduced levels.
That is P≤0.02%, S≤0.005%, N≤0.005%.
The two of technical solution of the present invention are to provide a kind of production method of 1600MPa grades of cold rolling martensite steel, including smelt
→ continuous casting → hot rolling → pickling → cold rolling → continuous annealing；
(1) hot rolling: heating temperature is 1230~1270 DEG C, keeps the temperature 180min or more；Hot rolling start rolling temperature is greater than 1100
DEG C, finishing temperature is 900~1000 DEG C；Coiling temperature is 600~650 DEG C.Slab heating temperature is low or soaking time is short, can make
It is very fast at temperature drop or temperature is uneven, come to rolled bands difficult；Heating temperature is high or soaking time length can then make slab burning, crystal grain
Abnormal growth.Start rolling temperature is to guarantee that finishing temperature, the range of finishing temperature then ensure that the operation of rolling is smooth, and deformation is anti-
Power is smaller.Coiling temperature is excessively high, and flat volume phenomenon easily occurs after batching；Coiling temperature is low, and hot rolling plate strength improves, and cold rolling production is difficult
Degree increases；
(2) pickling, cold rolling: hot rolled plate carries out cold rolling after conventional pickling, the control of cold rolling reduction ratio 50%~60% it
Between.Cold rolling reduction ratio is low, and die break degree is limited, and performance not can guarantee；Cold rolling reduction ratio is excessively high, and mill load increases, right
Equipment damage is big；
(3) continuous annealing: heating temperature be 830~870 DEG C, soaking time 90-120s, water quenching, enter coolant-temperature gage 700~
750 DEG C, tempering, tempering temperature is 280~320 DEG C, and tempering time is 300~400s, air-cooled later to room temperature.Heating temperature and
Time guarantees steel plate complete austenitizing, and temperature is excessively high or overlong time, not only waste of energy, and will cause crystallite dimension
It is excessive.It is excessively high to enter coolant-temperature gage, armor plate strength improves, and elongation percentage not can guarantee；It is low to enter coolant-temperature gage, then low strength.Tempering temperature
The high or time is long, a large amount of Carbide Precipitations is had in steel plate, strength reduction is larger；Temperature is low or the time is short, and stress elimination is endless
Entirely, steel plate elongation percentage is lower.
The beneficial effects of the present invention are:
Method is designed and produced using ingredient provided by the present invention, it is possible to produce tensile strength is greater than 1600MPa, prolongs
The super high tensile cold-rolled steel plate that rate is greater than 5% is stretched, intensity and plasticity index are more than the horse of maximum intensity rank in existing national standard
Family name's body steel product.
The chemical component that the present invention designs is simple, and any rare or precious metal element is not added in addition to C, Si, Mn, belongs to low
Cost-effective product.Not only intensity is high for the steel plate produced, and has certain forming capacity, can be used for roll-in processing automobile
The high-intensitive vehicle body parts of industry requirement.
Detailed description of the invention
Fig. 1 is 1 transmission electron microscope film figure of the embodiment of the present invention.
Specific embodiment
Below by embodiment, the present invention is further illustrated.
The embodiment of the present invention according to the component proportion of technical solution, smelt → continuous casting → hot rolling → pickling → cold rolling →
Continuous annealing.The ingredient of steel of the embodiment of the present invention is shown in Table 1.The main technologic parameters of steel of the embodiment of the present invention are shown in Table 2.The present invention is real
The performance for applying a steel is shown in Table 3.
The ingredient of 1 steel of the embodiment of the present invention of table
| Embodiment | C | Si | Mn | P | S | Al | N | Fe |
| 1 | 0.26 | 0.84 | 1.95 | 0.011 | 0.0032 | 0.031 | 0.0039 | Surplus |
| 2 | 0.24 | 0.78 | 2.18 | 0.015 | 0.0037 | 0.045 | 0.0027 | Surplus |
| 3 | 0.27 | 0.82 | 2.25 | 0.013 | 0.0020 | 0.052 | 0.0044 | Surplus |
| 4 | 0.25 | 0.55 | 1.82 | 0.017 | 0.0025 | 0.037 | 0.0031 | Surplus |
| 5 | 0.25 | 0.72 | 1.96 | 0.015 | 0.0031 | 0.042 | 0.0042 | Surplus |
The main technologic parameters of 2 steel of the embodiment of the present invention of table
The performance of 3 steel of the embodiment of the present invention of table
| Embodiment | Rp0.2(MPa) | Rm(MPa) | A80(%) |
| 1 | 1393 | 1625 | 5.8 |
| 2 | 1393 | 1624 | 5.5 |
| 3 | 1398 | 1640 | 5.4 |
| 4 | 1402 | 1642 | 5.2 |
| 5 | 1403 | 1637 | 5.5 |
By 1 transmission electron microscope film figure of the embodiment of the present invention, all martensite is organized, has typical lonneal special
Sign.
In order to state the present invention, explanation appropriately and is being sufficiently carried out to the present invention by embodiment among the above, it is above
Embodiment is merely to illustrate the present invention, and not limitation of the present invention, those of ordinary skill in related technical field, not
In the case where being detached from the spirit and scope of the present invention, it can also make a variety of changes and modification, made any modification are equally replaced
It changes, improve, should all be included in the protection scope of the present invention, scope of patent protection of the invention should be limited by claim
It is fixed.
Claims (2)
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| CN201811311880.9A CN109321828A (en) | 2018-11-06 | 2018-11-06 | 1600 MPa-grade cold-rolled martensitic steel and production method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109898018A (en) * | 2019-03-01 | 2019-06-18 | 鞍钢股份有限公司 | Cold-rolled 1300 MPa-grade martensitic steel and production method thereof |
| CN110129670A (en) * | 2019-04-25 | 2019-08-16 | 首钢集团有限公司 | A 1300MPa grade high-strength and high-plasticity hot stamping steel and its preparation method |
| CN111979470A (en) * | 2020-08-05 | 2020-11-24 | 鞍钢股份有限公司 | Production method of ultrahigh-strength cold-rolled martensite steel plate with good bending property |
| CN116752046A (en) * | 2023-06-28 | 2023-09-15 | 鞍钢股份有限公司 | 1600 MPa-grade automobile cold-rolled steel plate and manufacturing method thereof |
| CN116926422A (en) * | 2023-07-12 | 2023-10-24 | 河北大河材料科技有限公司 | A kind of Jippa grade cold-rolled high-strength steel and its production method |
| CN118186282A (en) * | 2024-03-04 | 2024-06-14 | 包头钢铁（集团）有限责任公司 | Manufacturing method of 1500 MPa-grade cold-rolled martensitic steel |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116752046A (en) * | 2023-06-28 | 2023-09-15 | 鞍钢股份有限公司 | 1600 MPa-grade automobile cold-rolled steel plate and manufacturing method thereof |
| CN116926422A (en) * | 2023-07-12 | 2023-10-24 | 河北大河材料科技有限公司 | A kind of Jippa grade cold-rolled high-strength steel and its production method |
| CN118186282A (en) * | 2024-03-04 | 2024-06-14 | 包头钢铁（集团）有限责任公司 | Manufacturing method of 1500 MPa-grade cold-rolled martensitic steel |
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