KR100723180B1 - 가공성이 우수한 냉연강판과 그 제조방법 - Google Patents
가공성이 우수한 냉연강판과 그 제조방법 Download PDFInfo
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- KR100723180B1 KR100723180B1 KR1020050129240A KR20050129240A KR100723180B1 KR 100723180 B1 KR100723180 B1 KR 100723180B1 KR 1020050129240 A KR1020050129240 A KR 1020050129240A KR 20050129240 A KR20050129240 A KR 20050129240A KR 100723180 B1 KR100723180 B1 KR 100723180B1
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- 239000010960 cold rolled steel Substances 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims description 15
- 230000008569 process Effects 0.000 title description 2
- 239000002244 precipitate Substances 0.000 claims abstract description 68
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 55
- 229910052802 copper Inorganic materials 0.000 claims abstract description 51
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 25
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 19
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 17
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 10
- 229910052796 boron Inorganic materials 0.000 claims abstract description 10
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 10
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 238000000137 annealing Methods 0.000 claims description 20
- 238000001816 cooling Methods 0.000 claims description 10
- 238000005098 hot rolling Methods 0.000 claims description 8
- 238000005096 rolling process Methods 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 6
- 238000005097 cold rolling Methods 0.000 claims description 5
- 230000009467 reduction Effects 0.000 claims description 5
- 238000003303 reheating Methods 0.000 claims description 5
- 230000009466 transformation Effects 0.000 claims description 4
- 230000032683 aging Effects 0.000 abstract description 15
- 238000012545 processing Methods 0.000 abstract description 8
- 238000007747 plating Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 4
- 239000013078 crystal Substances 0.000 abstract description 3
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000010949 copper Substances 0.000 description 64
- 239000011572 manganese Substances 0.000 description 58
- 229910000831 Steel Inorganic materials 0.000 description 33
- 239000010959 steel Substances 0.000 description 33
- 239000010936 titanium Substances 0.000 description 26
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 11
- 239000011651 chromium Substances 0.000 description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 239000006104 solid solution Substances 0.000 description 10
- 238000005728 strengthening Methods 0.000 description 10
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 8
- 230000001965 increasing effect Effects 0.000 description 8
- 238000001556 precipitation Methods 0.000 description 8
- 239000011593 sulfur Substances 0.000 description 8
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000001953 recrystallisation Methods 0.000 description 7
- 229910052804 chromium Inorganic materials 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 150000001247 metal acetylides Chemical class 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 230000003679 aging effect Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 238000010899 nucleation Methods 0.000 description 2
- 230000006911 nucleation Effects 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
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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%
-
- 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
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
- C21D8/0426—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
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
- C21D8/0436—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
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0447—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the heat treatment
- C21D8/0463—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the heat treatment following 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
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0447—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the heat treatment
- C21D8/0473—Final recrystallisation annealing
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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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
- C21D9/48—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals deep-drawing 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- 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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- 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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- 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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- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- 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
- C21D2211/004—Dispersions; Precipitations
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- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Metal Rolling (AREA)
Abstract
Description
구분 | 화학성분(중량%) | |||||||||
C | Mn | Cu | S | Al | N | P | B | Ti | 기타 | |
A1 | 0.0007 | 0.11 | 0.09 | 0.02 | 0.035 | 0.0008 | 0.043 | 0.0007 | 0.029 | Si:0.08 |
A2 | 0.0012 | 0.08 | 0.12 | 0.032 | 0.039 | 0.0021 | 0.08 | 0.0009 | 0.049 | Si:0.17 |
A3 | 0.0028 | 0.11 | 0.16 | 0.041 | 0.025 | 0.0019 | 0.11 | 0.0005 | 0.064 | Si:0.3 |
A4 | 0.0013 | 0.09 | 0.11 | 0.035 | 0.043 | 0.0023 | 0.082 | 0.0011 | 0.057 | Si:0.26 Mo:0.1 |
A5 | 0.0015 | 0.1 | 0.09 | 0.05 | 0.025 | 0.001 | 0.075 | 0.0012 | 0.069 | Si:0.32 Cr:0.21 |
A6 | 0.0035 | 0.45 | 0.14 | 0.009 | 0.033 | 0.0024 | 0.048 | 0.005 | 0 | |
A7 | 0.0031 | 0.13 | 0.03 | 0.012 | 0.038 | 0.0021 | 0.118 | 0 | 0.15 | Si:0.33 |
구분 | Cu+Mn | S* | (Mn/55+Cu/63.5)/(S*/32) | (Ti*/48)/(C/12) | (Mn,Cu)S석출물의 평균크기(㎛) | (Mn,Cu)S석출물 수 (개/㎟) |
A1 | 0.2 | 0.0057 | 19.173 | 1 | 0.04 | 4.5X106 |
A2 | 0.2 | 0.0089 | 11.972 | 1.01 | 0.04 | 5.2X106 |
A3 | 0.27 | 0.0096 | 14.994 | 0.86 | 0.03 | 6.3X106 |
A4 | 0.2 | 0.008 | 13.535 | 1.67 | 0.04 | 7.3X106 |
A5 | 0.19 | 0.0147 | 7.0611 | 1.04 | 0.04 | 8.9X106 |
A6 | 0.59 | 0.0125 | 26.566 | -1.2 | 0.25 | 1.5X104 |
A7 | 0.16 | -0.065 | -1.398 | 10.5 | 0.16 | 4.3X104 |
S*=S-0.8×(Ti-0.8×N(48/14))×(32/48) Ti*=Ti-0.8×S(48/32)-0.8×N(48/14) |
구분 | 기계적 성질 | 비고 | ||||||
항복강도 (MPa) | 인장강도 (MPa) | 연신율 (%) | 소성이방성 지수(rm) | 면내이방성 지수(Δr) | 시효평가지수(%) | 2차가공취성 (DBTT-℃) | ||
A1 | 222 | 352 | 46 | 2.04 | 0.39 | 0 | -70 | 발명강 |
A2 | 288 | 402 | 39 | 1.87 | 0.32 | 0 | -60 | 발명강 |
A3 | 338 | 454 | 35 | 1.68 | 0.29 | 0 | -50 | 발명강 |
A4 | 329 | 449 | 34 | 1.88 | 0.28 | 0 | -50 | 발명강 |
A5 | 383 | 452 | 35 | 1.64 | 0.29 | 0 | -50 | 발명강 |
A6 | 238 | 342 | 43 | 1.21 | 0.59 | 1.73 | -60 | 비교강 |
A7 | 302 | 433 | 30 | 1.65 | 0.48 | 0 | -50 | 비교강 |
Claims (16)
- 중량%로, C: 0.005%이하, Mn:0.2%이하, Cu:0.01-0.2%, S:0.005-0.08%, Al:0.1%이하, N:0.004%이하, P:0.2%이하, B:0.0001-0.002%, Ti:0.005~0.15%, 나머지 Fe 및 기타 불가피한 불순물로 조성되고,Cu+Mn:0.05-0.4, 0.003≤S*≤0.015, 1≤(Mn/55+Cu/63.5)/(S*/32)≤30, 0.8≤(Ti*/48)/(C/12)≤5.0여기서, S*=S-0.8×(Ti-0.8×N(48/14))×(32/48), Ti*=Ti-0.8×S(48/32)-0.8×N(48/14)를 만족하고, (Mn,Cu)S석출물의 평균크기가 0.2㎛이하로 이루어지는 가공성이 우수한 냉연강판.
- 제 1항에 있어서, 상기 (Mn,Cu)S의 석출물수는 1X106개/mm2이상임을 특징으로 하는 가공성이 우수한 냉연강판.
- 제 1항에 있어서, 상기 C의 함량은 0.0005-0.003%임을 특징으로 하는 가공성이 우수한 냉연강판.
- 제 1항에 있어서, 상기 Cu는 0.03-0.2%임을 특징으로 하는 가공성이 우수한 냉연강판.
- 제 1항 내지 제 4항중 어느 한 항에 있어서, 상기 P의 함량은 0.015%이하임을 특징으로 하는 가공성이 우수한 냉연강판.
- 제 1항 내지 제 4항중 어느 한 항에 있어서, 상기 P의 함량은 0.03~0.2%임을 특징으로 하는 가공성이 우수한 냉연강판.
- 제 1항 내지 제 4항중 어느 한 항에 있어서, 상기 냉연강판에는 Si:0.8%이하, Cr:1.2%이하의 1종 또는 2종이 추가로 포함되는 것을 특징으로 하는 가공성이 우수한 냉연강판.
- 제 1항 내지 제 4항중 어느 한 항에 있어서, 상기 냉연강판에는 Mo이 추가로 0.2%이하 포함되는 것을 특징으로 하는 가공성이 우수한 냉연강판.
- 중량%로, C: 0.005%이하, Mn:0.2%이하, Cu:0.01-0.2%, S:0.005-0.08%, Al:0.1%이하, N:0.004%이하, P:0.2%이하, B:0.0001-0.002%, Ti:0.005~0.15%, 나머지 Fe 및 기타 불가피한 불순물로 조성되고,Cu+Mn:0.05-0.4, 0.003≤S*≤0.015, 1≤(Mn/55+Cu/63.5)/(S*/32)≤30, 0.8≤(Ti*/48)/(C/12)≤5.0여기서, S*=S-0.8×(Ti-0.8×N(48/14))×(32/48), Ti*=Ti-0.8×S(48/32)-0.8×N(48/14)를 만족하는 슬라브를 1100℃이상의 온도로 재가열한 후 마무리 압연온도를 Ar3변태점 이상으로 하여 열간압연하고 300℃/min이상의 속도로 냉각하고 700℃이하의 온도에서 권취한 다음, 50-90%의 압하율로 냉간 압연하고, 700-900℃의 온도에서 연속소둔하여 평균크기가 0.2㎛이하의 (Mn,Cu)S석출물이 분포하는 가공성이 우수한 냉연강판의 제조방법.
- 제 9항에 있어서, 상기 (Mn,Cu)S의 석출물수는 1X106개/mm2이상임을 특징으로 하는 가공성이 우수한 냉연강판의 제조방법.
- 제 9항에 있어서, 상기 C의 함량은 0.0005-0.003%임을 특징으로 하는 가공성이 우수한 냉연강판의 제조방법.
- 제 9항에 있어서, 상기 Cu는 0.03-0.2%임을 특징으로 하는 가공성이 우수한 냉연강판의 제조방법.
- 제 9항 내지 제 12항중 어느 한 항에 있어서, 상기 P의 함량은 0.015%이하임을 특징으로 하는 가공성이 우수한 냉연강판의 제조방법.
- 제 9항 내지 제 12항중 어느 한 항에 있어서, 상기 P의 함량은 0.03~0.2%임을 특징으로 하는 가공성이 우수한 냉연강판의 제조방법.
- 제 9항 내지 제 12항중 어느 한 항에 있어서, 상기 냉연강판에는 Si:0.8%이하, Cr:1.2%이하의 1종 또는 2종이 추가로 포함되는 것을 특징으로 하는 가공성이 우수한 냉연강판의 제조방법.
- 제 9항 내지 제 12항중 어느 한 항에 있어서, 상기 냉연강판에는 Mo이 추가로 0.2%이하 포함되는 것을 특징으로 하는 가공성이 우수한 냉연강판의 제조방법.
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TW095115563A TWI327171B (en) | 2005-05-03 | 2006-05-02 | Cold roller steel sheet having superior formability, process for producing the same |
PCT/KR2006/001668 WO2006118423A1 (en) | 2005-05-03 | 2006-05-03 | Cold rolled steel sheet having superior formability , process for producing the same |
EP06732895.5A EP1888799B1 (en) | 2005-05-03 | 2006-05-03 | Cold rolled steel sheet having superior formability, process for producing the same |
JP2008509934A JP4954980B2 (ja) | 2005-05-03 | 2006-05-03 | 高成形性冷延鋼板とその製造方法。 |
US11/913,176 US20080149230A1 (en) | 2005-05-03 | 2006-05-03 | Cold Rolled Steel Sheet Having Superior Formability, Process for Producing the Same |
MX2007013677A MX2007013677A (es) | 2005-05-03 | 2006-05-03 | Lamina de acero laminada en frio que tiene formabilidad superior, proceso para producirla. |
CN2006800153918A CN101184858B (zh) | 2005-05-03 | 2006-05-03 | 具有优良的可成形性的冷轧钢板及其制造方法 |
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JP (3) | JP4954981B2 (ko) |
KR (42) | KR100723164B1 (ko) |
CN (3) | CN101171355A (ko) |
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KR100775338B1 (ko) * | 2006-11-21 | 2007-11-08 | 주식회사 포스코 | 성형성이 우수한 고항복비형 냉연강판 및 그 제조방법 |
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