CN107354376B - Roll-forming 550MPa grades of cold-rolled steel sheets of yield strength and production method - Google Patents
Roll-forming 550MPa grades of cold-rolled steel sheets of yield strength and production method Download PDFInfo
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- CN107354376B CN107354376B CN201710392045.1A CN201710392045A CN107354376B CN 107354376 B CN107354376 B CN 107354376B CN 201710392045 A CN201710392045 A CN 201710392045A CN 107354376 B CN107354376 B CN 107354376B
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
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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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- 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
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Abstract
The invention discloses a kind of roll-forming 550MPa grades of cold-rolled steel sheets of yield strength and its production method, steel plate chemical component composition and mass percentage are as follows: C:0.06~0.10%, Si:0.05~0.15%, Mn:1.10~1.30%, P≤0.020%, S≤0.008%, Als:0.020~0.060%, Nb:0.040~0.060%, Ti:0.030~0.050%, N≤0.0040%, remaining is iron and inevitable impurity；Production method include hot rolling, acid roll, continuous annealing, smooth process.The present invention is designed by reasonable ingredient and matches corresponding hot rolling, acid rolls, continuous annealing process, steel plate yield strength >=550MPa of production, elongation percentage A80 >=11%, 180 ° of bendings are not cracked, high-intensitive and excellent plasticity is had both, particularly suitable for production roll-forming part.
Description
Technical field
The invention belongs to metallurgical technology fields, and in particular to a kind of roll-forming 550MPa grades of cold-rolled steel sheets of yield strength
And its production method.
Background technique
For the development trend for adapting to auto industry low energy consumption and high security, car manufacturer and iron and steel enterprise are actively caused
Power is in the exploitation of body lightening design and automobile high-strength steel, and cold-rolled biphase steel and transformation induced plasticity steel have been realized at present
Industrialized production, but since cooling section and aging section Capability Requirement of such steel grade to continuous annealing furnace are higher, annealing process control
Make harsh, production difficulty is big.To reduce high-strength steel production difficulty, while guaranteeing that steel plate has enough intensity and plasticity, needs
Suitable microalloy element is added in cold-rolled steel sheet, while matching suitable technique, has both steel plate high-intensitive and excellent
Plasticity, particularly suitable for production roll-forming part.
Patent of invention CN200710045334.0 discloses a kind of high-strength high-tensile ratio cold-rolled steel sheet and its manufacturing method,
It is related to steel plate yield strength >=500MPa, to obtain this steel plate, in annealing process, steel plate is heated to 780-850 DEG C of guarantor
Be cooled fast to 200 DEG C hereinafter, this technique first segment is easy to control from high temperature rapid cooling by two-part after temperature, and second segment from
400-500 DEG C of lower temperature is cooled to 200 DEG C hereinafter, the cooling capacity to annealed wire requires height, and operability is not strong.
Patent of invention CN201410256779.3 discloses 600MPa grades of high-yield-ratio high-ductility cold-rolled steel sheets and its manufacture
Method, 790-850 DEG C of annealing temperature, 700-730 DEG C of slow cooling temperature, 320-360 DEG C of rapid cooling temperature, in steel it is compound be added to Nb and
Ti, yield strength >=500MPa of steel plate after annealing, tensile strength >=600MPa, an intensity lower than the steel plate that this patent is announced
Rank.
It is an object of that present invention to provide a kind of roll-forming 550MPa grades of cold-rolled steel sheets of yield strength and its production method,
By suitably smelting ingredient and hot rolling, cold rolling and continuous annealing process parameter, steel plate is made to have both high-intensitive and excellent modeling
Property, particularly suitable for production roll-forming part.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of roll-forming 550MPa grades of cold-rolled steel sheets of yield strength；This
Invention additionally provides a kind of production method of 550MPa grades of cold-rolled steel sheets of roll-forming yield strength.
In order to solve the above technical problems, the technical solution used in the present invention is: a kind of roll-forming yield strength
550MPa grades of cold-rolled steel sheets, the cold-rolled steel sheet chemical component composition and mass percentage are as follows: C:0.06~0.10%, Si:
0.05~0.15%, Mn:1.10~1.30%, P≤0.020%, S≤0.008%, Als:0.020~0.060%, Nb:0.040~
0.060%, Ti:0.030~0.050%, N≤0.0040%, remaining is iron and inevitable impurity.
Cold-rolled steel sheet of the present invention is with a thickness of 1.0-2.0mm.
Cold-rolled steel sheet yield strength >=500MPa of the present invention, tensile strength >=620MPa, elongation percentage A80 >=11%,
180 ° of bendings are not cracked.
The present invention also provides a kind of roll-forming production method of 550MPa grades of cold-rolled steel sheets of yield strength, the productions
Method include hot rolling, acid roll, continuous annealing, smooth process.
Hot-rolled process of the present invention, heating of plate blank is to 1250-1300 DEG C, slab time inside furnace 190-230min.
Hot-rolled process of the present invention, finish rolling start rolling temperature are 1050-1090 DEG C, and finishing temperature is 840-880 DEG C, are batched
Temperature is 560-600 DEG C.
Acid of the present invention rolls process, and acid rolls reduction ratio >=55%, Cold Rolled Plate Thickness 1.0-2.0mm.
Continuous annealing process of the present invention, soaking section temperature control is at 790~810 DEG C, soaking time 90-140s；Slow cooling
Section 4-10 DEG C of cooling rate/s, it is 680~720 DEG C that slow cooling, which terminates temperature,.
Continuous annealing process of the present invention, rapid cooling section cooling rate are 20-40 DEG C/s, and it is 380~420 DEG C that rapid cooling, which terminates temperature, when
350~390 DEG C of section temperature of effect.
Smooth process of the present invention, smooth elongation percentage divide specifications control 0.5~1.0%.
The product standard of roll-forming of the present invention 550MPa grades of cold-rolled steel sheets of yield strength refers to ASTM A1008M-13.
The beneficial effects of adopting the technical scheme are that 1, the present invention use low-carbon, Nb, Ti microalloying,
Si, Mn solution strengthening, are designed by reasonable ingredient and match corresponding hot rolling, acid rolls, continuous annealing process, are provided one kind and are rolled into
The production method of type cold-rolled steel sheet.2, steel plate yield strength >=550MPa produced by the invention, tensile strength >=620MPa are prolonged
Rate A80 >=11% is stretched, 180 ° of bendings are not cracked, and high-intensitive and excellent plasticity are had both, particularly suitable for production roll-forming part.
Specific embodiment
The present invention will be further described in detail below with reference to specific embodiments.
The production method of roll-forming 550MPa grades of cold-rolled steel sheets of yield strength uses following processing steps:
(1) hot-rolled process: by heating of plate blank to 1250-1300 DEG C, slab time inside furnace 190-230min；Finish rolling open rolling temperature
Degree is 1050-1090 DEG C, and finishing temperature is 840-880 DEG C, and coiling temperature is 560-600 DEG C；
(2) acid rolls process: acid rolls reduction ratio >=55%, Cold Rolled Plate Thickness 1.0-2.0mm；
(3) continuous annealing process: soaking section temperature control is at 790~810 DEG C, soaking time 90-140s, slow cooling section cooling rate 4-
10 DEG C/s, it is 680~720 DEG C that slow cooling, which terminates temperature, and rapid cooling section cooling rate is 20-40 DEG C/s, and it is 380~420 that rapid cooling, which terminates temperature,
DEG C, 350~390 DEG C of aging section temperature；
(4) smooth process: smooth elongation percentage divides specifications control 0.5~1.0%.
Embodiment 1
The present embodiment roll-forming is with 550MPa grades of cold-rolled steel sheets of yield strength with a thickness of 1.0mm, chemical component group
At and its mass percentage be shown in Table 1.
Specific production craft step is as follows:
(1) hot-rolled process: by heating of plate blank to 1260 DEG C, slab time inside furnace 215min；Finish rolling start rolling temperature is 1090
DEG C, finishing temperature is 880 DEG C, and coiling temperature is 590 DEG C；
(2) acid rolls process: acid rolls reduction ratio 60%, Cold Rolled Plate Thickness 1.0mm；
(3) continuous annealing process: soaking section temperature control is at 810 DEG C, soaking time 99s, 9 DEG C/s of slow cooling section cooling rate, slow cooling
Terminating temperature is 695 DEG C, and rapid cooling section cooling rate is 36 DEG C/s, and it is 405 DEG C, 350 DEG C of aging section temperature that rapid cooling, which terminates temperature,；
(4) smooth process: smooth elongation percentage is 0.6%.
The mechanical property of steel plate is shown in Table 2.
Embodiment 2
The present embodiment roll-forming is with 550MPa grades of cold-rolled steel sheets of yield strength with a thickness of 1.2mm, chemical component group
At and its mass percentage be shown in Table 1.
Specific production craft step is as follows:
(1) hot-rolled process: by heating of plate blank to 1290 DEG C, slab time inside furnace 230min；Finish rolling start rolling temperature is 1075
DEG C, finishing temperature is 875 DEG C, and coiling temperature is 560 DEG C；
(2) acid rolls process: acid rolls reduction ratio 60%, Cold Rolled Plate Thickness 1.2mm；
(3) continuous annealing process: soaking section temperature control is at 795 DEG C, soaking time 99s, 9 DEG C/s of slow cooling section cooling rate, slow cooling
Terminating temperature is 680 DEG C, and rapid cooling section cooling rate is 38 DEG C/s, and it is 380 DEG C, 370 DEG C of aging section temperature that rapid cooling, which terminates temperature,；
(4) smooth process: smooth elongation percentage is 0.6%.
The mechanical property of steel plate is shown in Table 2.
Embodiment 3
The present embodiment roll-forming is with 550MPa grades of cold-rolled steel sheets of yield strength with a thickness of 1.4mm, chemical component group
At and its mass percentage be shown in Table 1.
Specific production craft step is as follows:
(1) hot-rolled process: by heating of plate blank to 1250 DEG C, slab time inside furnace 190min；Finish rolling start rolling temperature is 1080
DEG C, finishing temperature is 860 DEG C, and coiling temperature is 580 DEG C；
(2) acid rolls process: acid rolls reduction ratio 60%, Cold Rolled Plate Thickness 1.4mm；
(3) continuous annealing process: soaking section temperature control is at 805 DEG C, soaking time 119s, 7 DEG C/s of slow cooling section cooling rate, slow cooling
Terminating temperature is 705 DEG C, and rapid cooling section cooling rate is 33 DEG C/s, and it is 388 DEG C, 365 DEG C of aging section temperature that rapid cooling, which terminates temperature,；
(4) smooth process: smooth elongation percentage is 0.7%.
The mechanical property of steel plate is shown in Table 2.
Embodiment 4
The present embodiment roll-forming is with 550MPa grades of cold-rolled steel sheets of yield strength with a thickness of 1.6mm, chemical component group
At and its mass percentage be shown in Table 1.
Specific production craft step is as follows:
(1) hot-rolled process: by heating of plate blank to 1300 DEG C, slab time inside furnace 205min；Finish rolling start rolling temperature is 1065
DEG C, finishing temperature is 870 DEG C, and coiling temperature is 570 DEG C；
(2) acid rolls process: acid rolls reduction ratio 55%, Cold Rolled Plate Thickness 1.6mm；
(3) continuous annealing process: soaking section temperature control is at 798 DEG C, soaking time 119s, 6 DEG C/s of slow cooling section cooling rate, slow cooling
Terminating temperature is 710 DEG C, and rapid cooling section cooling rate is 33 DEG C/s, and it is 398 DEG C, 385 DEG C of aging section temperature that rapid cooling, which terminates temperature,；
(4) smooth process: smooth elongation percentage is 0.8%.
The mechanical property of steel plate is shown in Table 2.
Embodiment 5
The present embodiment roll-forming is with 550MPa grades of cold-rolled steel sheets of yield strength with a thickness of 1.8mm, chemical component group
At and its mass percentage be shown in Table 1.
Specific production craft step is as follows:
(1) hot-rolled process: by heating of plate blank to 1275 DEG C, slab time inside furnace 220min；Finish rolling start rolling temperature is 1060
DEG C, finishing temperature is 850 DEG C, and coiling temperature is 600 DEG C；
(2) acid rolls process: acid rolls reduction ratio 55%, Cold Rolled Plate Thickness 1.8mm；
(3) continuous annealing process: soaking section temperature control is at 800 DEG C, soaking time 132s, 5 DEG C/s of slow cooling section cooling rate, slow cooling
Terminating temperature is 720 DEG C, and rapid cooling section cooling rate is 28 DEG C/s, and it is 420 DEG C, 390 DEG C of aging section temperature that rapid cooling, which terminates temperature,；
(4) smooth process: smooth elongation percentage is 0.9%.
The mechanical property of steel plate is shown in Table 2.
Embodiment 6
The present embodiment roll-forming is with 550MPa grades of cold-rolled steel sheets of yield strength with a thickness of 2.0mm, chemical component group
At and its mass percentage be shown in Table 1.
Specific production craft step is as follows:
(1) hot-rolled process: by heating of plate blank to 1280 DEG C, slab time inside furnace 195min；Finish rolling start rolling temperature is 1050
DEG C, finishing temperature is 865 DEG C, and coiling temperature is 575 DEG C；
(2) acid rolls process: acid rolls reduction ratio 58%, Cold Rolled Plate Thickness 2.0mm；
(3) continuous annealing process: soaking section temperature control is at 790 DEG C, soaking time 132s, 6 DEG C/s of slow cooling section cooling rate, slow cooling
Terminating temperature is 685 DEG C, and rapid cooling section cooling rate is 26 DEG C/s, and it is 410 DEG C, 375 DEG C of aging section temperature that rapid cooling, which terminates temperature,；
(4) smooth process: smooth elongation percentage is 1.0%.
The mechanical property of steel plate is shown in Table 2.
Embodiment 7
The present embodiment roll-forming is with 550MPa grades of cold-rolled steel sheets of yield strength with a thickness of 1.0mm, chemical component group
At and its mass percentage be shown in Table 1.
Specific production craft step is as follows:
(1) hot-rolled process: by heating of plate blank to 1275 DEG C, slab time inside furnace 220min；Finish rolling start rolling temperature is 1060
DEG C, finishing temperature is 840 DEG C, and coiling temperature is 600 DEG C；
(2) acid rolls process: acid rolls reduction ratio 59%, Cold Rolled Plate Thickness 1.0mm；
(3) continuous annealing process: soaking section temperature control is at 800 DEG C, soaking time 140s, 4 DEG C/s of slow cooling section cooling rate, slow cooling
Terminating temperature is 720 DEG C, and rapid cooling section cooling rate is 20 DEG C/s, and it is 420 DEG C, 390 DEG C of aging section temperature that rapid cooling, which terminates temperature,；
(4) smooth process: smooth elongation percentage is 0.5%.
The mechanical property of steel plate is shown in Table 2.
Embodiment 8
The present embodiment roll-forming is with 550MPa grades of cold-rolled steel sheets of yield strength with a thickness of 1.2mm, chemical component group
At and its mass percentage be shown in Table 1.
Specific production craft step is as follows:
(1) hot-rolled process: by heating of plate blank to 1290 DEG C, slab time inside furnace 230min；Finish rolling start rolling temperature is 1075
DEG C, finishing temperature is 875 DEG C, and coiling temperature is 560 DEG C；
(2) acid rolls process: acid rolls reduction ratio 60%, Cold Rolled Plate Thickness 1.2mm；
(3) continuous annealing process: soaking section temperature control is at 795 DEG C, soaking time 90s, 10 DEG C/s of slow cooling section cooling rate, slow cooling
Terminating temperature is 680 DEG C, and rapid cooling section cooling rate is 40 DEG C/s, and it is 380 DEG C, 370 DEG C of aging section temperature that rapid cooling, which terminates temperature,；
(4) smooth process: smooth elongation percentage is 0.6%.
1 embodiment 1-7 chemical component of table composition and mass percentage
2 embodiment 1-7 steel band mechanical property of table
The above embodiments are only used to illustrate and not limit the technical solutions of the present invention, although referring to above-described embodiment to this hair
It is bright to be described in detail, those skilled in the art should understand that: still the present invention can be modified or be waited
With replacement, without departing from the spirit or scope of the invention, or any substitutions, should all cover in power of the invention
In sharp claimed range.
Claims (6)
1. a kind of roll-forming 550MPa grades of cold-rolled steel sheets of yield strength, which is characterized in that the cold-rolled steel sheet chemical component
Composition and mass percentage are as follows: C:0.06~0.10%, Si:0.05~0.15%, Mn:1.10~1.30%, P≤0.020%, S
≤ 0.008%, Als:0.020~0.060%, Nb:0.042~0.060%, Ti:0.030~0.050%, N≤0.0040%, remaining
For iron and inevitable impurity, the cold-rolled steel sheet yield strength >=550MPa, tensile strength >=620MPa, elongation percentage A80
≥11%；The cold-rolled steel sheet production method include hot rolling, acid roll, continuous annealing, smooth process；The hot-rolled process, finish rolling open rolling temperature
Degree is 1050-1090 DEG C, and finishing temperature is 840-880 DEG C, and coiling temperature is 560-600 DEG C；The continuous annealing process, soaking zone temperature
Degree control is at 790~810 DEG C, soaking time 90-140s；4-10 DEG C of slow cooling section cooling rate/s, slow cooling terminate temperature be 680~
720 DEG C, rapid cooling section cooling rate is 20-40 DEG C/s, and it is 380~420 DEG C, 350~390 DEG C of aging section temperature that rapid cooling, which terminates temperature,.
2. a kind of roll-forming according to claim 1 550MPa grades of cold-rolled steel sheets of yield strength, which is characterized in that institute
Cold-rolled steel sheet is stated with a thickness of 1.0-2.0mm.
3. based on a kind of production method of roll-forming 550MPa grades of cold-rolled steel sheets of yield strength of any of claims 1 or 2,
It is characterized in that, the production method include hot rolling, acid roll, continuous annealing, smooth process；The hot-rolled process, finish rolling start rolling temperature
It is 1050-1090 DEG C, finishing temperature is 840-880 DEG C, and coiling temperature is 560-600 DEG C；The continuous annealing process, soaking section temperature
Control is at 790~810 DEG C, soaking time 90-140s；4-10 DEG C of slow cooling section cooling rate/s, it is 680~720 that slow cooling, which terminates temperature,
DEG C, rapid cooling section cooling rate is 20-40 DEG C/s, and it is 380~420 DEG C, 350~390 DEG C of aging section temperature that rapid cooling, which terminates temperature,.
4. a kind of production method of roll-forming 550MPa grades of cold-rolled steel sheets of yield strength according to claim 3,
It is characterized in that, the hot-rolled process, heating of plate blank is to 1250-1300 DEG C, slab time inside furnace 190-230min.
5. a kind of production method of roll-forming 550MPa grades of cold-rolled steel sheets of yield strength according to claim 3 or 4,
It is characterized in that, the acid rolls process, acid rolls reduction ratio >=55%, Cold Rolled Plate Thickness 1.0-2.0mm.
6. a kind of production method of roll-forming 550MPa grades of cold-rolled steel sheets of yield strength according to claim 5,
It is characterized in that, the smooth process, smooth elongation percentage divides specifications control 0.5~1.0%.
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| CN108754307B (en) * | 2018-05-24 | 2020-06-09 | 山东钢铁集团日照有限公司 | Method for producing economical cold-rolled DP780 steel with different yield strength grades |
| CN108998737A (en) * | 2018-07-03 | 2018-12-14 | 唐山钢铁集团有限责任公司 | It is a kind of to be bent and the excellent hot-dip galvanized high-strength steel plate of welding performance and its production method |
| CN111218620B (en) * | 2018-11-23 | 2021-10-22 | 宝山钢铁股份有限公司 | High-yield-ratio cold-rolled dual-phase steel and manufacturing method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5822327A (en) * | 1981-07-30 | 1983-02-09 | Nippon Kokan Kk <Nkk> | Production of superhigh-strength cold-rolled steel sheet by continuous annealing |
| JPH07224324A (en) * | 1994-02-09 | 1995-08-22 | Nisshin Steel Co Ltd | Production of high strength steel plate for precision punching |
| JP2003119543A (en) * | 2001-10-15 | 2003-04-23 | Nippon Steel Corp | Steel material for welded structure with little degradation of toughness caused by plastic strain, and manufacturing method therefor |
| CN102534373A (en) * | 2012-01-31 | 2012-07-04 | 宝山钢铁股份有限公司 | Super-high strength cold rolled steel belt suitable for rolling formation and manufacture method of super-high strength cold rolled steel belt |
| CN103409684A (en) * | 2013-07-11 | 2013-11-27 | 武汉钢铁(集团)公司 | High-strength cold-rolled magnetic pole steel and preparation method thereof |
| 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 |
-
2017
- 2017-05-27 CN CN201710392045.1A patent/CN107354376B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5822327A (en) * | 1981-07-30 | 1983-02-09 | Nippon Kokan Kk <Nkk> | Production of superhigh-strength cold-rolled steel sheet by continuous annealing |
| JPH07224324A (en) * | 1994-02-09 | 1995-08-22 | Nisshin Steel Co Ltd | Production of high strength steel plate for precision punching |
| JP2003119543A (en) * | 2001-10-15 | 2003-04-23 | Nippon Steel Corp | Steel material for welded structure with little degradation of toughness caused by plastic strain, and manufacturing method therefor |
| CN102534373A (en) * | 2012-01-31 | 2012-07-04 | 宝山钢铁股份有限公司 | Super-high strength cold rolled steel belt suitable for rolling formation and manufacture method of super-high strength cold rolled steel belt |
| CN103409684A (en) * | 2013-07-11 | 2013-11-27 | 武汉钢铁(集团)公司 | High-strength cold-rolled magnetic pole steel and preparation method thereof |
| 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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