发明名称 |
ALUMINUM-PLATED STEEL SHEET HAVING SUPERIOR CORROSION RESISTANCE, HOT PRESS FORMED PRODUCT USING THE SAME, AND METHOD FOR PRODUCTION THEREOF |
摘要 |
Provided are a coated steel sheet, a hot press formed product using the steel sheet, and a producing method thereof. Conditions for hot-dip coating bath are optimized when an aluminum-coated steel sheet is produced using a hot rolled steel sheet or a cold rolled steel sheet, and processes are controlled during production of a hot press formed product from the steel sheet, thereby forming a coating layer having a high ratio of (Fe 3 Al+FeAl) compound layer on the surface of the steel sheet. In cases where the (Fe 3 Al+FeAl) compound layer has an appropriate occupancy ratio with respect to the whole thickness of the coating layer, good resistance against crack and corrosion can be achieved to improve a local corrosion resistance of the hot press formed product, particularly, a pitting corrosion resistance. Therefore, high-quality hot press formed products can be produced with high productivity and lower costs. |
申请公布号 |
EP2377965(A2) |
申请公布日期 |
2011.10.19 |
申请号 |
EP20100729337 |
申请日期 |
2010.01.08 |
申请人 |
POSCO |
发明人 |
CHO, YEOL-RAE;KIM, TAI-HO;PARK, SUNG-HO;BAEK, EUNG-RYUL |
分类号 |
C23C2/12;B21D22/20;C23C2/02;C23C2/26 |
主分类号 |
C23C2/12 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|