发明名称 |
HOT PRESS FORMED ARTICLE HAVING EXCELLENT DELAMINATION RESISTANCE AND METHOD FOR MANUFACTURING SAME |
摘要 |
Provided are an hot press formed (HPF) article having excellent delamination resistance, and a method for manufacturing same. The present invention relates to an HPF article which has a melted aluminum plating layer formed on the surface of a base steel sheet and has excellent delamination resistance, wherein the base steel sheet comprises: 0.18-0.25% by weight of C; 0.1-1.0% by weight of Si; 0.9-1.5% by weight of Mn; 0.03% by weight or less of P; 0.01% by weight or less of S; 0.01-0.05% by weight of Al; 0.05-0.5% by weight of Cr; 0.01-0.05% by weight of Ti; 0.001-0.005% by weight of B; 0.009% by weight or less of N; and the balance Fe and other impurities, and wherein the plating layer consists of a soft diffusion layer and a hard alloy layer, the hard alloy layer having a tau layer irregularly and non-continuously dispersed and distributed on the inside thereof at 10% or more of the entire area fraction so that the difference in hardness between the alloy layer and the diffusion layer is 400 (Hv) or less. |
申请公布号 |
WO2016104880(A8) |
申请公布日期 |
2016.09.29 |
申请号 |
WO2015KR04327 |
申请日期 |
2015.04.29 |
申请人 |
POSCO |
发明人 |
KIM, Heung-Yun;SOHN, Il-Ryoung;BAE, Dae-Chul |
分类号 |
C22C38/38;C22C38/28;C23C2/12;C23C2/28 |
主分类号 |
C22C38/38 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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