KR20140052072A - 베이킹 경화성이 우수한 고강도 용융 아연 도금 강판, 고강도 합금화 용융 아연 도금 강판 및 그것들의 제조 방법 - Google Patents
베이킹 경화성이 우수한 고강도 용융 아연 도금 강판, 고강도 합금화 용융 아연 도금 강판 및 그것들의 제조 방법 Download PDFInfo
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- KR20140052072A KR20140052072A KR1020147008175A KR20147008175A KR20140052072A KR 20140052072 A KR20140052072 A KR 20140052072A KR 1020147008175 A KR1020147008175 A KR 1020147008175A KR 20147008175 A KR20147008175 A KR 20147008175A KR 20140052072 A KR20140052072 A KR 20140052072A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
- B32B15/013—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or 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
- C22C38/002—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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
- B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
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- C—CHEMISTRY; METALLURGY
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- C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
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- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
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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
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- C22C18/00—Alloys based on zinc
- C22C18/04—Alloys based on zinc with aluminium as the next major constituent
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- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
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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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- 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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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- 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
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- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
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- C—CHEMISTRY; METALLURGY
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
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- C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
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- C—CHEMISTRY; METALLURGY
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
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- C23C2/0224—Two or more thermal pretreatments
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- C—CHEMISTRY; METALLURGY
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
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- C—CHEMISTRY; METALLURGY
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
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Abstract
Description
Claims (12)
- 모재 강판이, 질량%로,
C: 0.075 내지 0.400%,
Si: 0.01 내지 2.00%,
Mn: 0.80 내지 3.50%,
P: 0.0001 내지 0.100%,
S: 0.0001 내지 0.0100%,
Al: 0.001 내지 2.00%,
N: 0.0001 내지 0.0100,
O: 0.0001 내지 0.0100,
을 각각 함유하고, 잔량부가 Fe 및 불가피적 불순물로 이루어지고,
상기 모재 강판의 조직이, 체적 분율로 3% 이상의 잔류 오스테나이트상, 50% 이하의 페라이트상 및 40% 이상의 경질상을 함유하고,
상기 모재 강판에서의 표면으로부터 판 두께 1/4를 중심으로 하는 1/8 두께 내지 표면으로부터 판 두께 1/4를 중심으로 하는 3/8 두께의 범위에 있어서,
평균 전위 밀도가 5×1013/m2 이상이며,
상기 잔류 오스테나이트상에 포함되는 고용 C량이 질량%로 0.70 내지 1.00%이며,
상기 잔류 오스테나이트상의 집합 조직의 FCC철의 X선 랜덤 강도비가 3.0 이하이고,
상기 잔류 오스테나이트상의 압연 방향에 대한 입경과 판 폭 방향에 대한 입경의 비가 0.75 내지 1.33이며,
또한, 상기 모재 강판의 표면에 용융 아연 도금층이 형성되어 판 두께 0.6 내지 5.0mm가 되는 것을 특징으로 하는, 베이킹 경화성이 우수한 고강도 용융 아연 도금 강판. - 제1항에 있어서, 상기 경질상이, 베이니틱 페라이트상 및/또는 베이나이트상, 템퍼링 마르텐사이트상 및 프레시 마르텐사이트상으로 이루어지는 것을 특징으로 하는, 베이킹 경화성이 우수한 고강도 용융 아연 도금 강판.
- 제1항에 있어서, 상기 모재 강판의 표층부에는, 산화물이 미세하게 분산되고, 또한 두께가 0.01 내지 10.0㎛인 탈탄층이 형성되어 있고, 상기 산화물의 평균 입자 직경이 500nm 이하, 평균 밀도가 1.0×1012개/m2 이상인 것을 특징으로 하는, 베이킹 경화성이 우수한 고강도 용융 아연 도금 강판.
- 제1항에 있어서, 또한, 질량%로,
Ti: 0.001 내지 0.150%,
Nb: 0.001 내지 0.100%,
V: 0.001 내지 0.300%,
의 1종 또는 2종 이상을 함유하는 것을 특징으로 하는, 베이킹 경화성이 우수한 고강도 용융 아연 도금 강판. - 제1항에 있어서, 또한, 질량%로,
Mo: 0.01 내지 2.00%,
W: 0.01 내지 2.00%,
Cr: 0.01 내지 2.00%,
Ni: 0.01 내지 2.00%,
Cu: 0.01 내지 2.00%,
B: 0.0001 내지 0.0100%,
의 1종 또는 2종 이상을 함유하는 것을 특징으로 하는, 베이킹 경화성이 우수한 고강도 용융 아연 도금 강판. - 제1항에 있어서, 또한, 질량%로,
Ca, Ce, Mg, Zr, La, REM의 1종 또는 2종 이상을 합계로 0.0001 내지 0.0100% 함유하는 것을 특징으로 하는, 베이킹 경화성이 우수한 고강도 용융 아연 도금 강판. - 제1항에 기재된 고강도 강판의 표면에 형성된 상기 용융 아연 도금층이 합금화 처리되어 있는 것을 특징으로 하는, 베이킹 경화성이 우수한 고강도 합금화 용융 아연 도금 강판.
- 질량%로,
C: 0.075 내지 0.400%,
Si: 0.01 내지 2.00%,
Mn: 0.80 내지 3.50%,
P: 0.0001 내지 0.100%,
S: 0.0001 내지 0.0100%,
Al: 0.001 내지 2.00%,
N: 0.0001 내지 0.0100,
O: 0.0001 내지 0.0100,
를 각각 함유하고, 잔량부가 Fe 및 불가피적 불순물로 이루어지는 화학 성분을 갖는 슬래브를 1180℃ 이상으로 가열하여 복수의 패스로 행하는 열간 압연을 개시하고, 1050℃ 내지 압연 완료 온도까지의 범위에서의 열연 강판의 온도(T), 판 두께(h) 및 각 패스간의 경과 시간(t)의 관계가 하기 식(1)을 만족하는 열간 압연을 행하여 880℃ 이상의 온도 영역에서 압연을 완료시키는 열간 압연 공정과,
열간 압연 완료 후부터 냉각 개시까지의 경과 시간을 1.0초 이상으로 한 후에 냉각을 개시하고, 450℃ 이상에서 이 냉각을 정지하는 제1 냉각 공정과,
제1 냉각 후부터 400℃까지의 경과 시간을 1.0시간 이상으로 하고, 그 후에 합계의 압하율을 30 내지 75%로 하여 냉간 압연하는 냉간 압연 공정과,
최고 가열 온도 (Ac3-50)℃ 이상에서 어닐링하는 연속 어닐링 공정과,
상기 연속 어닐링 공정 후, 상기 강판을 아연 도금욕에 침지하여 상기 강판의 표면에 용융 아연 도금층을 형성하는 도금 공정을 구비하고,
상기 아연 도금욕에 침지하기 전, 또는 침지한 후에 있어서, 300 내지 470℃의 범위 내의 온도에서, 20 내지 1000초 체류시키는 베이나이트 변태 처리를 행하는 것을 특징으로 하는, 베이킹 경화성이 우수한 고강도 용융 아연 도금 강판의 제조 방법.
또한, 상기 식(1)에 있어서, N은 열간 압연 개시부터 완료까지의 전체 패스수, i는 패스의 순서, Ti는 i회째의 패스에서의 압연 온도(℃), hi는 i회째의 패스에서의 가공 후 판 두께(mm), ti는 i회째의 패스부터 다음 패스까지의 경과 시간을 나타낸다. 또한, i=1일 때, h0=슬래브 두께이다. 또한, 최종 패스부터 다음 패스까지의 경과 시간은, 최종 패스부터 열간 압연 완료 후의 냉각 개시 시점까지의 경과 시간으로 한다. - 제8항에 있어서, 상기 도금 공정은, 가열할 때에 사용하는 공기와 연료 가스에 의한 혼합 가스에서의 단위 체적의 당해 혼합 가스에 포함되는 공기의 체적과 단위 체적의 당해 혼합 가스에 포함되는 연료 가스를 완전 연소시키기 위하여 이론상 필요해지는 공기의 체적의 비인 공기비가 0.7 내지 1.2가 된 예열대에서 상기 강판의 표층부에 산화물을 생성시키고, 계속해서, H2O와 H2의 분압비(P(H2O)/P(H2))가 0.0001 내지 2.0이 된 환원대에서 상기 산화물을 환원한 후, 도금욕 온도를 450 내지 470℃, 도금욕 진입 시의 강판 온도를 430 내지 490℃, 도금욕 내에서의 유효 Al량을 0.01 내지 0.18질량%로 한 조건에서 상기 강판을 아연 도금욕에 침지시킴으로써, 상기 강판의 표면에 상기 용융 아연 도금층을 형성하는 것을 특징으로 하는, 베이킹 경화성이 우수한 고강도 용융 아연 도금 강판의 제조 방법.
- 제8항에 있어서, 상기 도금 공정 후에, 상기 강판을 5.00% 이하의 압하율로 압연을 실시하는 조질 압연 공정을 구비하는 것을 특징으로 하는, 베이킹 경화성이 우수한 고강도 용융 아연 도금 강판의 제조 방법.
- 제8항에 기재된 제조 방법에 의해 고강도 용융 아연 도금 강판으로 한 후에, 상기 용융 아연 도금층을 합금화시키는 것을 특징으로 하는, 베이킹 경화성이 우수한 고강도 합금화 용융 아연 도금 강판의 제조 방법.
- 제10항에 있어서, 상기 용융 아연 도금층을 합금화시킨 후에, 상기 강판을 10% 미만의 압하율로 압연을 실시하는 조질 압연 공정을 구비하는 것을 특징으로 하는, 베이킹 경화성이 우수한 고강도 합금화 용융 아연 도금 강판의 제조 방법.
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- 2012-09-28 TW TW101136120A patent/TWI507538B/zh not_active IP Right Cessation
- 2012-09-28 CA CA2850340A patent/CA2850340C/en not_active Expired - Fee Related
- 2012-09-28 PL PL12835585T patent/PL2762582T3/pl unknown
- 2012-09-28 EP EP12835585.6A patent/EP2762582B1/en active Active
- 2012-09-28 US US14/348,536 patent/US9162422B2/en active Active
- 2012-09-28 KR KR1020147008175A patent/KR101614230B1/ko active Active
- 2012-09-28 WO PCT/JP2012/075218 patent/WO2013047821A1/ja not_active Ceased
- 2012-09-28 JP JP2013513440A patent/JP5413539B2/ja active Active
- 2012-09-28 CN CN201280047553.1A patent/CN103842541B/zh active Active
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| KR20170126512A (ko) * | 2014-05-20 | 2017-11-17 | 아르셀러미탈 | 높은 기계적 강도와 연성 특징을 가지는 이중 소둔된 강판, 이러한 판들의 제조 방법 및 용도 |
| US10995386B2 (en) | 2014-05-20 | 2021-05-04 | Arcelormittal | Double annealed steel sheet having high mechanical strength and ductility characteristics, method of manufacture and use of such sheets |
| KR20170016484A (ko) * | 2014-07-18 | 2017-02-13 | 신닛테츠스미킨 카부시키카이샤 | 강재 및 그 제조 방법 |
| US10508317B2 (en) | 2014-07-18 | 2019-12-17 | Nippon Steel Corporation | Steel product and manufacturing method of the same |
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| US10590504B2 (en) | 2014-12-12 | 2020-03-17 | Jfe Steel Corporation | High-strength cold-rolled steel sheet and method for manufacturing the same |
| KR20170128555A (ko) * | 2015-04-01 | 2017-11-22 | 제이에프이 스틸 가부시키가이샤 | 열연 강판 및 그 제조 방법 |
| KR20180088707A (ko) * | 2016-03-25 | 2018-08-06 | 신닛테츠스미킨 카부시키카이샤 | 고강도 강판 및 고강도 아연 도금 강판 |
| US11035021B2 (en) | 2016-03-25 | 2021-06-15 | Nippon Steel Corporation | High-strength steel sheet and high-strength galvanized steel sheet |
| KR20200118445A (ko) * | 2018-02-07 | 2020-10-15 | 타타 스틸 네덜란드 테크날러지 베.뷔. | 고강도 열간 압연 또는 냉간 압연 및 어닐링된 강 및 그 제조 방법 |
| WO2025121705A1 (ko) * | 2023-12-08 | 2025-06-12 | 현대제철 주식회사 | 도금강판 및 그 제조방법 |
Also Published As
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| MX373560B (es) | 2020-05-08 |
| EP2762582A1 (en) | 2014-08-06 |
| TW201329251A (zh) | 2013-07-16 |
| US9162422B2 (en) | 2015-10-20 |
| JP5413539B2 (ja) | 2014-02-12 |
| ZA201402352B (en) | 2016-01-27 |
| EP2762582A4 (en) | 2015-12-02 |
| BR112014007498A2 (pt) | 2017-04-04 |
| EP2762582B1 (en) | 2019-03-06 |
| KR101614230B1 (ko) | 2016-04-20 |
| CA2850340A1 (en) | 2013-04-04 |
| MX2014003718A (es) | 2014-07-14 |
| PL2762582T3 (pl) | 2019-08-30 |
| RU2014117645A (ru) | 2015-11-10 |
| JPWO2013047821A1 (ja) | 2015-03-30 |
| CN103842541A (zh) | 2014-06-04 |
| TWI507538B (zh) | 2015-11-11 |
| US20140234660A1 (en) | 2014-08-21 |
| ES2725803T3 (es) | 2019-09-27 |
| BR112014007498B1 (pt) | 2019-04-30 |
| CA2850340C (en) | 2016-10-18 |
| CN103842541B (zh) | 2016-03-30 |
| WO2013047821A1 (ja) | 2013-04-04 |
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