KR100700473B1 - 고강도 용융 아연 도금 강판 및 그 제조 방법 - Google Patents
고강도 용융 아연 도금 강판 및 그 제조 방법 Download PDFInfo
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- KR100700473B1 KR100700473B1 KR1020057013049A KR20057013049A KR100700473B1 KR 100700473 B1 KR100700473 B1 KR 100700473B1 KR 1020057013049 A KR1020057013049 A KR 1020057013049A KR 20057013049 A KR20057013049 A KR 20057013049A KR 100700473 B1 KR100700473 B1 KR 100700473B1
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- 229910001335 Galvanized steel Inorganic materials 0.000 title claims abstract description 62
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- 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
- C21D8/0273—Final recrystallisation annealing
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- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
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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
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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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- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
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- 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
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- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
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- 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
- C21D8/0278—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular surface treatment
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T428/12861—Group VIII or IB metal-base component
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Abstract
Description
Claims (13)
- 중량 단위로서, C: 0.03 내지 0.25 %, Si: 0.05 내지 2.0 %, Mn: 0.5 내지 2.5 %, P: 0.03 % 이하, S: 0.02 % 이하 및 Al: 0.01 내지 2.0 %를 함유하고, 이때 Si, Mn 및 Al 간의 관계는 식, Si+Al+Mn ≥ 1.0 %를 만족하는강판의 각각의 표면 상에 용융 도금층이 형성되며,질산을 증발시켜서 용융 도금층을 용해시킨 후 상기 강판 표면을 주사 전자 현미경으로 관찰했을 때 상기 강판의 표면적의 5 내지 80 %가 산화물이며,환원 소둔로만의 설비를 이용하여 소둔한 것을 특징으로 하는 고강도 용융 아연 도금 강판.
- 제1항에 있어서, 중량 단위로서, Ni: 0.01 내지 2.0 % 및 Cr: 0.01 내지 0.5 % 중 어느 하나 또는 이들 모두를 추가로 함유하는 것을 특징으로 하는 고강도 용융 아연 도금 강판.
- 제1항 또는 제2항에 있어서, 상기 강판 표면 상의 산화물은 Si, Mn 및 Al 중 하나 이상을 함유하는 것을 특징으로 하는 고강도 용융 아연 도금 강판.
- 제2항에 있어서, 중량 단위로서, Mo: 0.01 내지 0.5 %, Cu: 0.01 내지 1.0 %, Sn: 0.01 내지 0.10 %, V: 0.3 % 미만, Ti: 0.06 % 미만, Nb: 0.06 % 미만, B: 0.01 % 미만, REM: 0.05 % 미만, Ca: 0.05 % 미만, Zr: 0.05 % 미만 및 Mg: 0.05 % 미만 중 하나 이상을 추가로 함유하는 것을 특징으로 하는 고강도 용융 아연 도금 강판.
- 잔류 오스테나이트를 함유하고 청구항 제4항에 명시된 원소들 중에서 Mo만이 첨가될 때,Si, Al 및 Ni 간의 관계는 식, 0.4(%) ≤ Si(%)+Al(%) ≤ 2.0(%), Ni(%) ≥ 1/5×Si(%)+1/10×Al(%) 및 1/20×Ni(%) ≤ Mo(%) ≤ 10×Ni(%)를 만족하며,강판에서 상기 잔류 오스테나이트의 체적비가 2 내지 20 %의 범위에 있고, 환원 소둔로만의 설비를 이용하여 소둔한 것을 특징으로 하는 고강도 용융 아연 도금 강판.
- 잔류 오스테나이트를 함유하고 청구항 제4항에 명시된 원소들 중에서 Mo외에도 Cu 또는 Sn이 추가로 첨가될 때,Ni, Cu 및 Sn 간의 관계는 식, 2×Ni(%) > Cu(%)+3×Sn(%)를 만족하며,Si, Al, Ni, Cu 및 Sn 간의 관계는 식, Ni(%)+Cu(%)+3×Sn(%) ≥ 1/5×Si(%)+1/10×Al(%)를 만족하며,강판에서 상기 잔류 오스테나이트의 체적비가 2 내지 20 %의 범위에 있고, 환원 소둔로만의 설비를 이용하여 소둔한 것을 특징으로 하는 고강도 용융 아연 도금 강판.
- 강판의 잔류 오스테나이트 체적비가 2 내지 20 %의 범위에 있으며, 청구항 제5항 또는 제6항에 명시된 성분 범위를 만족하는 강판에 대해,750 내지 900 ℃의 이상 공존 온도 범위에서 10초 내지 6분 동안 열연 및 냉연 강판을 소둔하는 단계와,다음으로 2 내지 200 ℃/sec의 냉각 속도로 최고 350 내지 500 ℃까지 냉각시키거나 때때로 상기 온도 범위에서 10분 이하 동안 열 체류시키는 단계와,다음으로 용융 아연 도금하는 단계와,이후에 5 ℃/sec 이상의 냉각 속도로 250 ℃ 이하로 냉각하는 단계를 포함하는 공정을 수행함으로써 상기 강판의 각각의 표면 상에 용융 아연 도금층이 형성되고, 환원 소둔로만의 설비를 이용하여 소둔한 것을 특징으로 하는 고강도 용융 아연 도금 강판 제조 방법.
- 강판의 잔류 오스테나이트 체적비가 2 내지 20 %의 범위에 있으며, 청구항 제5항 또는 제6항에 명시된 성분 범위를 만족하는 강판에 대해,750 내지 900 ℃의 이상 공존 온도 범위에서 10초 내지 6분 동안 열연 및 냉연 강판을 소둔하는 단계와,다음으로 2 내지 200 ℃/sec의 냉각 속도로 최고 350 내지 500 ℃까지 냉각시키거나 때때로 상기 온도 범위에서 10분 이하 동안 열 체류시키는 단계와,이후에 용융 아연 도금하는 단계와,다음으로 450 내지 600 ℃의 온도 범위에서 5초 내지 2분 동안 열 체류시키는 단계와,이후에 5 ℃/sec 이상의 냉각 속도로 250 ℃ 이하로 냉각하는 단계를 포함하는 공정을 수행함으로써 상기 강판의 각각의 표면 상에 8 내지 15 %의 Fe를 함유하는 합금 용융 아연 도금층이 형성되고, 환원 소둔로만의 설비를 이용하여 소둔한 것을 특징으로 하는 고강도 용융 아연 도금 강판 제조 방법.
- 강판을 용융 아연 도금 처리하기 전에, 분위기가 400 내지 750 ℃의 온도 범위에서 50 ppm 이하의 산소 농도를 가질 수 있고, 상기 분위기에서의 수소 농도와 이슬점과 산소 농도를 각각 H(%), D(℃) 및 O(ppm)라고 할 때, H, D 및 O가 750 ℃ 이상의 온도 범위에서 30초 이상 동안 식, O ≤ 30 ppm과, 20×exp(0.1×D) ≤ H ≤ 2,000×exp(0.1×D)을 만족할 수 있도록 제어되는 분위기에서, 청구항 제1항 또는 제2항에 명시된 성분 범위를 만족하는 강판을 처리하고, 환원 소둔로만의 설비를 이용하여 소둔한 것을 특징으로 하는 고강도 용융 아연 도금 강판 제조 방법.
- 강판을 용융 아연 도금 처리하기 전에, 분위기에서의 수소 농도 및 이슬점과 강판에서의 Ni 농도를 각각 H(%), D(℃) 및 Ni(%)라고 할 때, H, D 및 Ni가 750 ℃ 이상의 온도 범위에서 30초 이상 동안 식, 3×exp{0.1×(D+20×(1-Ni(%)))} ≤ H ≤ 2,000×exp{0.1×(D+20×(1-Ni(%)))}을 만족할 수 있도록 제어되는 분위기에서, 청구항 제2항에 명시된 성분 범위를 만족하는 강판을 처리하고, 환원 소둔로만의 설비를 이용하여 소둔한 것을 특징으로 하는 고강도 용융 아연 도금 강판 제조 방법.
- 제1항에 있어서, 상기 강판의 각각의 표면 상에는 용융 아연 도금층이 형성되며, 상기 강판의 소정 섹션을 SEM으로 관찰했을 때 상기 용융 아연 도금층 바로 아래의 강판 표면이 산화된 것을 특징으로 하는 고강도 용융 아연 도금 강판.
- 제1항 또는 제2항에 있어서, 상기 강판은 추가로 가열되고 합금되는 것을 특징으로 하는 고강도 용융 아연 도금 강판.
- 제1항에 있어서, 상기 강판의 각각의 표면 상에는 용융 아연 도금층이 형성되며, 상기 강판의 소정 섹션을 SEM으로 관찰했을 때 상기 용융 아연 도금층 바로 아래의 모재의 표면층에서 관찰되는 산화물의 최대 길이는 3 ㎛ 이하이고 상기 산화물은 그들 사이에 간극을 갖는 것을 특징으로 하는 고강도 용융 아연 도금 강판.
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2004
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- 2004-01-15 JP JP2006500391A patent/JP4523937B2/ja not_active Expired - Fee Related
- 2004-01-15 ES ES04702409.6T patent/ES2633914T3/es not_active Expired - Lifetime
- 2004-01-15 KR KR1020057013049A patent/KR100700473B1/ko active IP Right Grant
- 2004-01-15 WO PCT/JP2004/000239 patent/WO2004063410A1/en active Application Filing
- 2004-01-15 US US10/542,393 patent/US7294412B2/en not_active Expired - Lifetime
- 2004-01-15 EP EP04702409.6A patent/EP1587966B1/en not_active Expired - Lifetime
- 2004-01-15 CN CN200480002242.9A patent/CN1985016B/zh not_active Expired - Lifetime
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2007
- 2007-10-24 US US11/977,537 patent/US7736449B2/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010036028A2 (ko) * | 2008-09-23 | 2010-04-01 | 포항공과대학교 산학협력단 | 기지로서 마르텐사이트 조직을 가지는 초고강도 용융아연도금 강판 및 그 제조 방법 |
WO2010036028A3 (ko) * | 2008-09-23 | 2010-07-01 | 포항공과대학교 산학협력단 | 기지로서 마르텐사이트 조직을 가지는 초고강도 용융아연도금 강판 및 그 제조 방법 |
US8741078B2 (en) | 2008-09-23 | 2014-06-03 | Postech Academy-Industry Foundation | Method for manufacturing an ultrahigh strength hot dip galvanized steel sheet having martensitic structure as matrix |
Also Published As
Publication number | Publication date |
---|---|
CN1985016A (zh) | 2007-06-20 |
CA2513298A1 (en) | 2004-07-29 |
JP2006517257A (ja) | 2006-07-20 |
WO2004063410A1 (en) | 2004-07-29 |
JP4523937B2 (ja) | 2010-08-11 |
CA2513298C (en) | 2012-01-03 |
KR20050092113A (ko) | 2005-09-20 |
EP1587966A1 (en) | 2005-10-26 |
US20080053576A1 (en) | 2008-03-06 |
EP1587966B1 (en) | 2017-05-17 |
ES2633914T3 (es) | 2017-09-26 |
US20060124907A1 (en) | 2006-06-15 |
US7736449B2 (en) | 2010-06-15 |
US7294412B2 (en) | 2007-11-13 |
CN1985016B (zh) | 2011-09-14 |
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