KR20200069328A - 액체금속취화 저항성 아연 도금 강판의 제조 방법 - Google Patents
액체금속취화 저항성 아연 도금 강판의 제조 방법 Download PDFInfo
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Abstract
Description
Claims (18)
- 이하의 연속적인 단계들을 포함하는 도금 강판 (coated steel sheet) 의 제조 방법:
A. 600 nm 내지 1400 nm 의 두께를 가지며 니켈로 이루어진 제 1 코팅으로 강판을 코팅하는 단계로서, 상기 강판은 중량% 로 다음의 조성:
0.10 < C < 0.40%,
1.5 < Mn < 3.0%,
0.7 < Si < 3.0%,
0.05 < Al < 1.0%,
0.75 < (Si+Al) < 3.0,
및 순전히 선택적인 기준에 따라,
Nb ≤ 0.5 %,
B ≤ 0.010%,
Cr ≤ 1.0%,
Mo ≤ 0.50%,
Ni ≤ 1.0%,
Ti ≤ 0.5%
와 같은 하나 이상의 원소를 갖고,
상기 조성의 잔부는 철 및 정교화 (elaboration) 로부터 유래하는 불가피한 불순물로 구성된, 상기 코팅하는 단계,
B. 코팅된 상기 강판을 820 내지 1200 ℃ 의 온도에서 재결정 어닐링 (recrystallization annealing) 하는 단계,
C. 단계 B) 에서 획득된 상기 강판을, 니켈을 포함하지 않는 아연계 제 2 코팅으로 코팅하는 단계. - 제 1 항에 있어서,
단계 A) 에서, 상기 제 1 코팅이 600 내지 950 nm 의 두께를 갖는, 도금 강판의 제조 방법. - 제 2 항에 있어서,
단계 A) 에서, 상기 제 1 코팅이 600 내지 750 nm 또는 750 내지 950 nm 의 두께를 갖는, 도금 강판의 제조 방법. - 제 1 항 내지 제 3 항 중 어느 한 항에 있어서,
단계 B) 에서, 상기 재결정 어닐링은 연속 어닐링인, 도금 강판의 제조 방법. - 제 1 항 내지 제 4 항 중 어느 한 항에 있어서,
단계 B) 에서, 상기 재결정 어닐링은 -60 내지 -30 ℃ 의 이슬점 또는 60 ℃ 미만의 이슬점에서 1 내지 10% 의 H2 를 포함하는 분위기에서 수행되는, 도금 강판의 제조 방법. - 제 1 항 내지 제 4 항 중 어느 한 항에 있어서,
단계 B) 에서, 상기 재결정 어닐링은 -30 내지 +30 ℃ 의 이슬점에서 1 내지 10% 의 H2 를 포함하는 분위기에서 수행되는, 도금 강판의 제조 방법. - 제 6 항에 있어서,
단계 B) 에서, 상기 재결정 어닐링은 -10 내지 +10 ℃ 의 이슬점에서 1 내지 10% 의 H2 를 포함하는 분위기에서 수행되는, 도금 강판의 제조 방법. - 제 1 항 내지 제 7 항 중 어느 한 항에 있어서,
단계 C) 에서, 제 2 층은 50% 초과의 아연을 포함하는, 도금 강판의 제조 방법. - 제 8 항에 있어서,
단계 C) 에서, 상기 제 2 층은 75% 초과의 아연을 포함하는, 도금 강판의 제조 방법. - 제 9 항에 있어서,
단계 C) 에서, 상기 제 2 층은 90% 초과의 아연을 포함하는, 도금 강판의 제조 방법. - 제 10 항에 있어서,
단계 C) 에서, 상기 제 2 층은 아연으로 이루어진, 도금 강판의 제조 방법. - 제 1 항 내지 제 11 항 중 어느 한 항에 따른 방법으로부터 획득 가능한 강판으로서, 상기 강판은 강 중으로의 니켈의 확산을 통해 형성된 니켈 및 철을 포함하는 확산 코팅을 포함하고, 확산 층은 니켈을 포함하지 않는 아연계 코팅에 의해 직접 덮이는 (topped), 강판.
- 제 12 항에 있어서,
상기 강판은 강판 표면으로부터 최대 깊이 40 ㎛ 를 갖는 탈탄층을 포함하는, 강판. - 적어도 제 12 항 또는 제 13 항에 따른 강판 또는 제 1 항 내지 제 11 항 중 어느 한 항에 따른 방법으로 획득 가능한 강판을 포함하는 적어도 2 개의 금속 판들의 스폿 용접 조인트로서,
상기 스폿 용접 조인트는 100 ㎛ 초과의 크기를 갖는 2 개 이하의 크랙을 포함하고, 가장 긴 크랙은 450 ㎛ 미만의 길이를 갖는, 스폿 용접 조인트. - 제 14 항에 있어서,
제 2 금속 판이 강판 또는 알루미늄판인, 스폿 용접 조인트. - 제 15 항에 있어서,
상기 제 2 금속 판은 제 12 항 또는 제 13 항에 따른 강판 또는 제 1 항 내지 제 11 항 중 어느 한 항에 따른 방법으로부터 획득 가능한 강판인, 스폿 용접 조인트. - 제 14 항 내지 제 16 항 중 어느 한 항에 있어서,
상기 스폿 용접 조인트는 강판 또는 알루미늄판인 제 3 금속 판을 포함하는, 스폿 용접 조인트. - 자동차의 제조를 위한, 제 12 항 또는 제 13 항에 따른 도금 강판 또는 제 14 항 내지 제 17 항 중 어느 한 항에 따른 스폿 용접 조인트의 용도.
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| PCT/IB2018/058991 WO2019097440A1 (en) | 2017-11-17 | 2018-11-15 | A method for the manufacturing of liquid metal embrittlement resistant zinc coated steel sheet |
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| WO2025127736A1 (ko) * | 2023-12-14 | 2025-06-19 | 주식회사 포스코 | 냉연강판 및 그 제조방법 |
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