CN105463321A - Batch annealing process plane isotropy steel and manufacturing method thereof - Google Patents
Batch annealing process plane isotropy steel and manufacturing method thereof Download PDFInfo
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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
- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—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
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0242—Flattening; Dressing; Flexing
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
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- C—CHEMISTRY; METALLURGY
- 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
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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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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Abstract
The invention discloses batch annealing process plane isotropy steel and a manufacturing method thereof. The isotropy steel comprises, by weight percentage, 0.008%-0.020% of C, 0.50%-0.70% of Mn, 0.002%-0.06% of ALs, 0.050%-0.070% of P, 0.015%-0.030% of Nb, 0.20%-0.30% of Si, 0.012% of S or less, 0.003% of N or less and the balance Fe and inevitable impurities. The isotropy steel has the beneficial effects that the yield strength is at the level of 300 MPa, Rp0.2 ranges from 300 MPa to 350 MPa, and the tensile strength Rm ranges from 340 MPa to 400 MPA; deep drawability is excellent, elongation A80 mm is larger than or equal to 30%, the plastic strain ratio r90 is larger than or equal to 1.4, and the work-hardening index n 90 is larger than 0.16; and delta r is smaller than or equal to 0.20.
Description
Technical field
The present invention relates to cold-rolled steel sheet field and refer to a kind of bell-type annealing technique planar isotropy steel and manufacture method thereof particularly.
Background technology
Isotropic steel (IS, isotropystee1) there is low △ r value (△ r:(r0+r90-2r45)/2) feature, material steady flow and coordination mutually in all directions during shaping, be conducive to obtaining good formability, especially for punching press cup-shaped object, wall thickness reduction is even and ear processed is very little, yield strength rank highest level is 300MPa, is necessary to develop a kind of composition and the technique steel plate with planar isotropy 300MPa rank controlled, with low cost to promote the application of isotropic steel.
At present, cold rolling isotropic characteristics steel plate yield strength is in 220MPa rank, 260MPa rank, 300MPa rank.At present, for yield strength 300MPa level product in the application of automobile stamping structural part, main use low-alloy high-strength product made from steel, but the cost of alloy of product is high, and the part requirements of more complicated shaping can not be met, be necessary the cheap and better isotropy product made from steel of plasticity of cost of development.
Summary of the invention
A kind of bell-type annealing technique planar isotropy steel and manufacture method thereof are the object of this invention is to provide.The 300MPa rank that the method utilizes bell-type annealing to produce line low production cost has the cold-rolled products of isotropic characteristic, Substitute For Partial 300MPa level low alloy high-strength steel product, meets the automobile structure punching press of more complicated forming requirements.
For achieving the above object, a kind of bell-type annealing technique planar isotropy steel provided by the invention, the raw materials by weight of described same sex steel is counted: C:0.008 ~ 0.020%, Mn:0.50 ~ 0.70%, ALs:0.02 ~ 0.06%, P:0.050 ~ 0.070%, Nb:0.015 ~ 0.030%, Si:0.20 ~ 0.30%, S≤0.012%, N≤0.003%; Surplus is Fe and inevitable impurity.
Further, the raw materials by weight of described same sex steel is counted: C:0.010 ~ 0.020%, Mn:0.50 ~ 0.70%, ALs:0.03 ~ 0.05%, P:0.055 ~ 0.065%, Nb:0.020 ~ 0.028%, Si:0.20 ~ 0.30%, S:0.005 ~ 0.012%, N:0.001 ~ 0.003%; Surplus is Fe and inevitable impurity.
Again further, the raw materials by weight of described same sex steel is counted: C:0.012%, Mn:0.65%, ALs:0.035%, P:0.06%, Nb:0.023%, Si:0.22%, S:0.008%, N:0.0015%; Surplus is Fe and inevitable impurity.
Again further, the yield strength of described same sex steel is 300MPa level, R
p0.2=300 ~ 350MPa, tensile strength Rm=340 ~ 400MPa, elongation A
80mm>=30%, plastic strain ratio r
90>=1.4, work hardening exponent n
90>=0.16 and △ r≤0.20.
Present invention also offers a kind of preparation method of bell-type annealing technique planar isotropy steel, the method by heating of plate blank, cooling is batched, cold rolling, bell-type annealing, coilcooling five large steps prepare same sex steel,
1) in heating of plate blank process, slab soaking temperature 1220 ~ 1280 DEG C, 1050 DEG C of open rollings, hot rolling finish to gauge end temp 890-920 DEG C, rolling thickness is 2.5 ~ 5.0mm;
2) cool in coiling process, steel plate batches to 680 ~ 720 DEG C through water-spraying control;
3) in cold-rolled process, coil of strip naturally cools to 70 DEG C ~ room temperature, and scale on surface is removed in uncoiling pickling, implements 68 ~ 80% total reductions and carries out cold rolling, rolling thickness 0.5 ~ 1.6mm;
4) in process of bell type annealing, annealing furnace coil of strip hot(test)-spot temperature 680 DEG C, cold-point temperature 660 DEG C, to reach after temperature insulation 1 ~ 3 hour, changes cooling cowl, by water-spraying control and air-cooled to 400 DEG C, naturally cools to 170 DEG C and comes out of the stove;
5), in coilcooling process, coilcooling, to 70 DEG C ~ room temperature, controls levelling machine tension force < 30 tons, implements 1.2 ~ 1.6% smooth unit elongation by levelling machine rolling load.
Principle of the present invention
1) C content of the present invention reduces (comparatively soft steel), improves plasticity; On the other hand, ensure suitable C in steel, be combined into Secondary phase particle with Nb, be conducive to the isotropy controlling steel.
2) the present invention adds Mn with low cost, P element, plays the effect of solution strengthening in steel, controls the intensity of steel.
3) S that the present invention adds is harmful element in deep drawing steel, and in steel, form MnS sulfides, should avoid S too high levels, Si elemental stable controls in certain interval, reduces and is solid-solubilized in the impact that in steel, Si element fluctuates on armor plate strength.
4) Al adds as reductor in deep drawing steel, is dissolved in the oxygen in molten steel when object mainly removes smelting, and aluminium is as determining nitrogen agent in addition, can suppress the solid solution of nitrogen in ferrite, eliminates strain aging, improves low-temperature flexibility.
5) negative impact of N causes steel plate to surrender effect and strain aging, by the content of less N element, with steel sheet stable performance.
6) Nb element and C, N element generate Secondary phase particle NbC, Nb (CN), play the object of C element in regulation and control steel on the one hand, and on the other hand, the suitable Secondary phase particle be evenly distributed in steel is conducive to the isotropy controlling product.
7) at process aspect, adopt finishing temperature and the coiling temperature of high temperature, in conjunction with the bell-type annealing temperature of 680 DEG C, realize the raising of product stamping formabilily; And bell-type annealing technique focus 680 DEG C and cold spot 660 DEG C are close, air-cooled to 400 DEG C later for a long time naturally cooling make the solid solution that in steel, C element is more balanced, be conducive to the homogeneity obtaining product performance, acquisition isotropic characteristics; Implemented the smooth unit elongation of 1.2 ~ 1.6% by rolling load, eliminate the yield point elongation of steel plate, avoid steel plate 0 °, the r value of 45 °, 90 ° produces greatest differences, thus the isotropy product made from steel that final acquisition is desirable.
Beneficial effect of the present invention is:
Same sex steel yield strength 300MPa level (R of the present invention
p0.2=300 ~ 350MPa, tensile strength Rm=340 ~ 400MPa), and there is excellent deep drawability (elongation A
80mm>=30%, plastic strain ratio r
90>=1.4, work hardening exponent n
90>=0.16.), there is the feature of △ r≤0.20 simultaneously.
Embodiment
In order to explain the present invention better, illustrate main contents of the present invention further below in conjunction with specific embodiment, but content of the present invention is not only confined to following examples.
Embodiment 1
The raw materials by weight of bell-type annealing technique planar isotropy steel 1 is counted: C:0.015%, Mn:0.60%, ALs:0.04%, P:0.060%, Nb:0.022%, Si:0.25%, S:0.006%, N:0.001%; Surplus is Fe and inevitable impurity; This same sex steel 1 is batched by heating of plate blank, cooling, cold rolling, bell-type annealing, coilcooling five large steps prepare:
1) in heating of plate blank process, slab soaking temperature 1250 DEG C, 1050 DEG C of open rollings, hot rolling finish to gauge end temp 900 DEG C, rolling thickness is 3.0mm;
2) cool in coiling process, steel plate batches to 700 DEG C through water-spraying control;
3) in cold-rolled process, coil of strip naturally cools to room temperature, and scale on surface is removed in uncoiling pickling, implements 77% total reduction and carries out cold rolling, rolling thickness 0.7mm;
4) in process of bell type annealing, annealing furnace coil of strip hot(test)-spot temperature 680 DEG C, cold-point temperature 660 DEG C, to reach after temperature insulation 1 hour, changes cooling cowl, by water-spraying control and air-cooled to 400 DEG C, naturally cools to 170 DEG C and comes out of the stove;
5), in coilcooling process, coilcooling, to room temperature, controls levelling machine tension force < 30 tons, implements 1.3% smooth unit elongation by levelling machine rolling load.
Embodiment 2
The raw materials by weight of bell-type annealing technique planar isotropy steel 2 is counted: C:0.020%, Mn:0.50%, ALs:0.02%, P:0.070%, Nb:0.015%, Si:0.30%, S:0.012%, N:0.003%; Surplus is Fe and inevitable impurity; This same sex steel 2 is batched by heating of plate blank, cooling, cold rolling, bell-type annealing, coilcooling five large steps prepare:
The raw materials by weight of described same sex steel is counted: C:0.012%, Mn:0.65%, ALs:0.035%, P:0.06%, Nb:0.023%, Si:0.22%, S:0.008%, N:0.0015%; Surplus is Fe and inevitable impurity.
1) in heating of plate blank process, slab soaking temperature 1280 DEG C, 1050 DEG C of open rollings, hot rolling finish to gauge end temp 890 DEG C, rolling thickness is 5.0mm;
2) cool in coiling process, steel plate batches to 680 DEG C through water-spraying control;
3) in cold-rolled process, coil of strip naturally cools to 50 DEG C, and scale on surface is removed in uncoiling pickling, implements 68% total reduction and carries out cold rolling, rolling thickness 1.6mm;
4) in process of bell type annealing, annealing furnace coil of strip hot(test)-spot temperature 680 DEG C, cold-point temperature 660 DEG C, to reach after temperature insulation 3 hours, changes cooling cowl, by water-spraying control and air-cooled to 400 DEG C, naturally cools to 170 DEG C and comes out of the stove;
5), in coilcooling process, coilcooling, to room temperature, controls levelling machine tension force < 30 tons, implements 1.6% smooth unit elongation by levelling machine rolling load.
The yield strength of described same sex steel is 300MPa level, R
p0.2=340MPa, tensile strength Rm=378MPa, elongation A
80mm=35%, plastic strain ratio r
90=1.49, work hardening exponent n
90=0.17, and △ r=0.09 (≤0.20).
Embodiment 3
The raw materials by weight of bell-type annealing technique planar isotropy steel 3 is counted: C:0.008%, Mn:0.70%, ALs:0.06%, P:0.050%, Nb:0.030%, Si:0.20%, S:0.002%, N:0.001%; Surplus is Fe and inevitable impurity; This same sex steel 3 is batched by heating of plate blank, cooling, cold rolling, bell-type annealing, coilcooling five large steps prepare:
1) in heating of plate blank process, slab soaking temperature 1220 DEG C, 1050 DEG C of open rollings, hot rolling finish to gauge end temp 920 DEG C, rolling thickness is 4.0mm;
2) cool in coiling process, steel plate batches to 680 DEG C through water-spraying control;
3) in cold-rolled process, coil of strip naturally cools to 70 DEG C, and scale on surface is removed in uncoiling pickling, implements 80% total reduction and carries out cold rolling, rolling thickness 0.8mm;
4) in process of bell type annealing, annealing furnace coil of strip hot(test)-spot temperature 680 DEG C, cold-point temperature 660 DEG C, to reach after temperature insulation 2 hours, changes cooling cowl, by water-spraying control and air-cooled to 400 DEG C, naturally cools to 170 DEG C and comes out of the stove;
5), in coilcooling process, coilcooling, to room temperature, controls levelling machine tension force < 30 tons, implements 1.4% smooth unit elongation by levelling machine rolling load.
The yield strength of described same sex steel is 300MPa level, R
p0.2=309MPa, tensile strength Rm=361MPa, elongation A
80mm=34%, plastic strain ratio r
90=1.58, work hardening exponent n
90=0.18, and △ r=0.17 (≤0.20).
Embodiment 4
The raw materials by weight of bell-type annealing technique planar isotropy steel 4 is counted: C:0.010%, Mn:0.60%, ALs:0.03%, P:0.055%, Nb:0.020%, Si:0.25%, S:0.008%, N:0.002%; Surplus is Fe and inevitable impurity; This same sex steel 4 is batched by heating of plate blank, cooling, cold rolling, bell-type annealing, coilcooling five large steps prepare:
1) in heating of plate blank process, slab soaking temperature 1280 DEG C, 1050 DEG C of open rollings, hot rolling finish to gauge end temp 890 DEG C, rolling thickness is 2.5mm;
2) cool in coiling process, steel plate batches to 720 DEG C through water-spraying control;
3) in cold-rolled process, coil of strip naturally cools to 45 DEG C, and scale on surface is removed in uncoiling pickling, implements 68 ~ 80% total reductions and carries out cold rolling, rolling thickness 0.6mm;
4) in process of bell type annealing, annealing furnace coil of strip hot(test)-spot temperature 680 DEG C, cold-point temperature 660 DEG C, to reach after temperature insulation 2 hours, changes cooling cowl, by water-spraying control and air-cooled to 400 DEG C, naturally cools to 170 DEG C and comes out of the stove;
5), in coilcooling process, coilcooling, to room temperature, controls levelling machine tension force < 30 tons, implements 1.2% smooth unit elongation by levelling machine rolling load.
The yield strength of described same sex steel is 300MPa level, R
p0.2=318MPa, tensile strength Rm=354MPa, elongation A
80mm=33%, plastic strain ratio r
90=1.55, work hardening exponent n
90=0.17, and △ r=0.14 (≤0.20).
Embodiment 5
The raw materials by weight that the raw materials by weight of bell-type annealing technique planar isotropy steel 5 counts described same sex steel is counted: C:0.012%, Mn:0.65%, ALs:0.035%, P:0.06%, Nb:0.023%, Si:0.22%, S:0.008%, N:0.0015%; Surplus is Fe and inevitable impurity; This same sex steel 5 is batched by heating of plate blank, cooling, cold rolling, bell-type annealing, coilcooling five large steps prepare:
1) in heating of plate blank process, slab soaking temperature 1270 DEG C, 1050 DEG C of open rollings, hot rolling finish to gauge end temp 910 DEG C, rolling thickness is 4.5mm;
2) cool in coiling process, steel plate batches to 700 DEG C through water-spraying control;
3) in cold-rolled process, coil of strip naturally cools to room temperature, and scale on surface is removed in uncoiling pickling, implements 73% total reduction and carries out cold rolling, rolling thickness 1.2mm;
4) in process of bell type annealing, annealing furnace coil of strip hot(test)-spot temperature 680 DEG C, cold-point temperature 660 DEG C, to reach after temperature insulation 2 hours, changes cooling cowl, by water-spraying control and air-cooled to 400 DEG C, naturally cools to 170 DEG C and comes out of the stove;
5), in coilcooling process, coilcooling, to room temperature, controls levelling machine tension force < 30 tons, implements 1.5% smooth unit elongation by levelling machine rolling load.
The yield strength of described same sex steel is 300MPa level, R
p0.2=328MPa, tensile strength Rm=378MPa, elongation A
80mm=36%, plastic strain ratio r
90=1.59, work hardening exponent n
90=0.17, and △ r=0.11 (≤0.20).
Other unspecified part is prior art.Although above-described embodiment is to invention has been detailed description; but it is only the present invention's part embodiment; instead of whole embodiment, people can also obtain other embodiments according to the present embodiment under without creative prerequisite, and these embodiments all belong to scope.
Claims (5)
1. a bell-type annealing technique planar isotropy steel, is characterized in that: the raw materials by weight of described same sex steel is counted: C:0.008 ~ 0.020%, Mn:0.50 ~ 0.70%, ALs:0.02 ~ 0.06%, P:0.050 ~ 0.070%, Nb:0.015 ~ 0.030%, Si:0.20 ~ 0.30%, S≤0.012%, N≤0.003%; Surplus is Fe and inevitable impurity.
2. bell-type annealing technique planar isotropy steel according to claim 1, is characterized in that: the raw materials by weight of described same sex steel is counted: C:0.010 ~ 0.020%, Mn:0.50 ~ 0.70%, ALs:0.03 ~ 0.05%, P:0.055 ~ 0.065%, Nb:0.020 ~ 0.028%, Si:0.20 ~ 0.30%, S:0.005 ~ 0.012%, N:0.001 ~ 0.003%; Surplus is Fe and inevitable impurity.
3. bell-type annealing technique planar isotropy steel according to claim 2, is characterized in that: the raw materials by weight of described same sex steel is counted: C:0.012%, Mn:0.65%, ALs:0.035%, P:0.06%, Nb:0.023%, Si:0.22%, S:0.008%, N:0.0015%; Surplus is Fe and inevitable impurity.
4. bell-type annealing technique planar isotropy steel according to claim 1 or 2 or 3, is characterized in that: the yield strength of described same sex steel is 300MPa level, R
p0.2=300 ~ 350MPa, tensile strength Rm=340 ~ 400MPa, elongation A
80mm>=30%, plastic strain ratio r
90>=1.4, work hardening exponent n
90>=0.16 and △ r≤0.20.
5. a preparation method for bell-type annealing technique planar isotropy steel described in claim 1, the method is batched by heating of plate blank, cooling, cold rolling, bell-type annealing, coilcooling five large steps prepare same sex steel, it is characterized in that:
1) in heating of plate blank process, slab soaking temperature 1220 ~ 1280 DEG C, 1050 DEG C of open rollings, hot rolling finish to gauge end temp 890-920 DEG C, rolling thickness is 2.5 ~ 5.0mm;
2) cool in coiling process, steel plate batches to 680 ~ 720 DEG C through water-spraying control;
3) in cold-rolled process, coil of strip naturally cools to 70 ~ room temperature, and scale on surface is removed in uncoiling pickling, implements 68 ~ 80% total reductions and carries out cold rolling, rolling thickness 0.5 ~ 1.6mm;
4) in process of bell type annealing, annealing furnace coil of strip hot(test)-spot temperature 680 DEG C, cold-point temperature 660 DEG C, to reach after temperature insulation 1 ~ 3 hour, changes cooling cowl, by water-spraying control and air-cooled to 400 DEG C, naturally cools to 170 DEG C and comes out of the stove;
5), in coilcooling process, coilcooling, to 70 ~ 25 DEG C, controls levelling machine tension force < 30 tons, implements 1.2 ~ 1.6% smooth unit elongation by levelling machine rolling load.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114058817A (en) * | 2021-11-18 | 2022-02-18 | 包头钢铁（集团）有限责任公司 | Production method of cold-rolled deep-drawing steel with thickness of 3.0mm |
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| CN104561787A (en) * | 2015-01-16 | 2015-04-29 | 唐山钢铁集团有限责任公司 | Production method for cold-rolled annealed sheet formed by rolling |
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- 2015-12-08 CN CN201510903391.2A patent/CN105463321A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5906690A (en) * | 1995-12-16 | 1999-05-25 | Fried. Krupp Ag Hoesch-Krupp | Method of producing cold-rolled, high-strength steel strip with good plasticity and isotropic properties |
| JPH108142A (en) * | 1996-06-26 | 1998-01-13 | Kawasaki Steel Corp | Manufacture of steel sheet for can manufacture, excellent in workability and free from surface roughing |
| CN102703808A (en) * | 2012-06-12 | 2012-10-03 | 武汉钢铁(集团)公司 | Steel for 300MPa-grade automobile structural part and production method for steel |
| KR20140118312A (en) * | 2013-03-28 | 2014-10-08 | 현대제철 주식회사 | Cold-rolled steel sheet and method of manufacturing the same |
| CN104561787A (en) * | 2015-01-16 | 2015-04-29 | 唐山钢铁集团有限责任公司 | Production method for cold-rolled annealed sheet formed by rolling |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114058817A (en) * | 2021-11-18 | 2022-02-18 | 包头钢铁（集团）有限责任公司 | Production method of cold-rolled deep-drawing steel with thickness of 3.0mm |
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