KR20200076741A - 알루미늄계 도금 강판, 알루미늄계 도금 강판의 제조 방법 및 자동차용 부품의 제조 방법 - Google Patents
알루미늄계 도금 강판, 알루미늄계 도금 강판의 제조 방법 및 자동차용 부품의 제조 방법 Download PDFInfo
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Abstract
Description
도 2는 동 실시 형태에 관한 알루미늄계 도금 강판의 다른 구성예를 나타낸 모식도다.
도 3은 동 실시 형태에 관한 알루미늄계 도금 강판에 대해, 표면 부근의 단면을 주사형 전자 현미경(SEM)으로 관찰하여 얻어진 2차 전자 상의 예이다.
도 4는 종래 기술의 알루미늄계 도금 강판에 대해, 표면 부근의 단면을 SEM으로 관찰하여 얻어진 2차 전자 상의 예이다.
도 5는 동 실시 형태에 관한 알루미늄계 도금 강판의 금속간 화합물층에 대해, 표면 부근의 단면의 2차 전자 상에 기초하는, 각 개소에 있어서의 두께의 평균값, 두께의 최댓값, 두께의 표준 편차의 실측예이다.
2: 알루미늄계 도금층
3: 금속간 화합물층
4: 산화물 함유 영역
Claims (7)
- 모재와,
상기 모재의 상방에 위치하는 알루미늄계 도금층과,
상기 모재와 상기 알루미늄계 도금층 사이에 위치하고, Al과 Fe의 금속간 화합물을 포함하는 금속간 화합물층을 구비하고,
상기 모재는, 질량%로,
C: 0.15% 이상 0.50% 이하,
Si: 0.010% 이상 2.000% 이하,
Mn: 0.3% 이상 5.0% 이하,
Cr: 0.010% 이상 2.000% 이하,
P: 0.1% 이하,
S: 0.1% 이하,
Al: 0.5% 이하,
B: 0.0002% 이상 0.0100% 이하,
N: 0% 이상 0.01% 이하,
W: 0% 이상 3% 이하,
Mo: 0% 이상 3% 이하,
V: 0% 이상 2% 이하,
Ti: 0% 이상 0.5% 이하,
Nb: 0% 이상 1% 이하,
Ni: 0% 이상 5% 이하,
Cu: 0% 이상 3% 이하,
Sn: 0% 이상 0.1% 이하, 및
Sb: 0% 이상 0.1% 이하
를 함유하고, 잔부가 Fe 및 불순물로 이루어지고,
상기 알루미늄계 도금층은, 평균으로,
80질량% 이상 97질량% 이하의 Al과,
3질량% 이상 15질량% 이하의 Si와,
0질량% 이상 5질량% 이하의 Zn과,
0질량% 이상 5질량% 이하의 Fe와,
합계로 0질량% 이상 3질량% 이하의, Mg 및 Ca로 이루어지는 군에서 선택되는 1종 이상과,
불순물을,
합계로 100질량%가 되도록 함유하고,
상기 금속간 화합물층의 두께의 평균값이, 2㎛ 이상 10㎛ 이하이고,
상기 금속간 화합물층의 두께의 최댓값이, 10㎛ 이상 25㎛ 이하이고,
상기 금속간 화합물층의 두께의 표준 편차가, 2㎛ 이상 10㎛ 이하인,
것을 특징으로 하는 알루미늄계 도금 강판. - 제1항에 있어서,
상기 모재와 상기 금속간 화합물층의 계면으로부터 상기 모재의 중심 방향을 향해 5㎛까지의 범위 내에, Si 산화물, Mn 산화물, Cr 산화물 및 B 산화물로 이루어지는 군에서 선택되는 1종 이상을, 합계로 1질량% 이상 10질량% 이하 함유하는 산화물 함유 영역을 갖는 것을 특징으로 하는 알루미늄계 도금 강판. - 제1항 또는 제2항에 있어서,
상기 알루미늄계 도금층은, Mg 및 Ca로 이루어지는 군에서 선택되는 1종 이상을 합계로 0.01질량% 이상 3질량% 이하 함유하는 것을 특징으로 하는 알루미늄계 도금 강판. - 제1항 내지 제3항 중 어느 한 항에 기재된 알루미늄계 도금 강판의 제조 방법이며,
강 슬래브를 열간 압연하여 열연 강판을 얻는 공정과,
상기 열연 강판을 권취하는 공정과,
상기 열연 강판을 산세하는 공정과,
상기 열연 강판을 냉간 압연하여 냉연 강판을 얻는 공정과,
상기 냉연 강판에 연속적으로 어닐링 처리 및 용융 알루미늄계 도금 처리를 하는 공정을 구비하고,
상기 강 슬래브의 성분은, 질량%로,
C: 0.15% 이상 0.50% 이하,
Si: 0.010% 이상 2.000% 이하,
Mn: 0.3% 이상 5.0% 이하,
Cr: 0.010% 이상 2.000% 이하,
P: 0.1% 이하,
S: 0.1% 이하,
Al: 0.5% 이하,
B: 0.0002% 이상 0.0100% 이하,
N: 0% 이상 0.01% 이하,
W: 0% 이상 3% 이하,
Mo: 0% 이상 3% 이하,
V: 0% 이상 2% 이하,
Ti: 0% 이상 0.5% 이하,
Nb: 0% 이상 1% 이하,
Ni: 0% 이상 5% 이하,
Cu: 0% 이상 3% 이하,
Sn: 0% 이상 0.1% 이하, 및
Sb: 0% 이상 0.1% 이하
를 함유하고, 잔부가 Fe 및 불순물로 이루어지고,
상기 권취에서의 강판 권취 온도 CT를, 700℃ 이상 850℃ 이하로 하고,
상기 냉간 압연 후의 상기 냉연 강판의 표면의 산술 평균 조도 Ra를, 0.5㎛ 이상 5㎛ 이하로 하고,
상기 용융 알루미늄계 도금 처리에 있어서의 도금욕은,
80질량% 이상 97질량% 이하의 Al과,
3질량% 이상 15질량% 이하의 Si와,
불순물과,
0질량% 이상 5질량% 이하의 Zn과,
0질량% 이상 5질량% 이하의 Fe와,
합계로 0질량% 이상 3질량% 이하의, Mg 및 Ca로 이루어지는 군에서 선택되는 1종 이상을,
합계로 100질량%가 되도록 함유하는
것을 특징으로 하는 알루미늄계 도금 강판의 제조 방법. - 제4항에 있어서,
상기 어닐링 처리에 있어서, 판 온도 650℃ 이상 900℃ 이하의 범위의 어닐링 분위기의 수증기 분압 PH2O와 수소 분압 PH2의 관계식 log(PH2O/PH2)의 값을, -3 이상 -0.5 이하로 하고,
상기 판 온도에 있어서의 어닐링 시간을, 60초 이상 500초 이하로 하는 것을 특징으로 하는 알루미늄계 도금 강판의 제조 방법. - 제4항 또는 제5항에 있어서,
상기 도금욕은, Mg 및 Ca로 이루어지는 군에서 선택되는 1종 이상을, 합계로 0.01질량% 이상 3질량% 이하 함유하는 것을 특징으로 하는 알루미늄계 도금 강판의 제조 방법. - 제1항 내지 제3항 중 어느 한 항에 기재된 알루미늄계 도금 강판을, 850℃ 이상까지 가열하는 공정과,
상기 알루미늄계 도금 강판을 금형에 의해 프레스 성형하는 공정과,
상기 알루미늄계 도금 강판을 상기 금형에 의해 30℃/s 이상의 냉각 속도로 급랭하는 공정을
구비하는 자동차용 부품의 제조 방법.
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| KR102330812B1 (ko) * | 2020-06-30 | 2021-11-24 | 현대제철 주식회사 | 열간 프레스용 강판 및 이의 제조 방법 |
| KR20230169265A (ko) * | 2021-07-14 | 2023-12-15 | 닛폰세이테츠 가부시키가이샤 | Al 도금 강판, Al 도금 강판의 제조 방법, 및 핫 스탬프 성형체의 제조 방법 |
| WO2025095753A1 (ko) * | 2023-10-30 | 2025-05-08 | 주식회사 포스코 | 열간 프레스 성형용 도금강판, 열간 성형 부재, 열간 프레스 성형 부품 및 이들의 제조방법과, 성형 장치, 성형 방법, 배터리 케이스용 브라켓 및 배터리팩 모듈 |
| WO2025135805A1 (ko) * | 2023-12-18 | 2025-06-26 | 주식회사 포스코 | 열간성형용 도금강판 및 그 제조방법과 열간 프레스 성형 부재의 제조방법 |
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| KR102330812B1 (ko) * | 2020-06-30 | 2021-11-24 | 현대제철 주식회사 | 열간 프레스용 강판 및 이의 제조 방법 |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP3722447A1 (en) | 2020-10-14 |
| EP3722447A4 (en) | 2021-05-26 |
| KR102428588B1 (ko) | 2022-08-03 |
| WO2019111931A1 (ja) | 2019-06-13 |
| US20210164080A1 (en) | 2021-06-03 |
| BR112020010082A2 (pt) | 2020-11-03 |
| CA3082980A1 (en) | 2019-06-13 |
| TW201928085A (zh) | 2019-07-16 |
| US11535916B2 (en) | 2022-12-27 |
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