发明名称 |
ZINC-PLATED STEEL SHEET FOR HOT PRESSING HAVING OUTSTANDING SURFACE CHARACTERISTICS, HOT-PRESSED MOULDED PARTS OBTAINED USING THE SAME, AND A PRODUCTION METHOD FOR THE SAME |
摘要 |
Provided is a zinc-plated steel sheet for hot pressing having outstanding surface characteristics, comprising: a steel foundation plate comprising a metal surface diffusion layer of which the Gibbs free energy reduction per mole of oxygen during oxidation is less than that of Cr; an aluminum-rich layer containing at least 30 wt. % of aluminium formed on the surface diffusion layer, and a zinc plating layer formed on the aluminum-rich layer. In this way, a metal having a low affinity for oxygen is coated to an effective thickness prior to annealing and thus the creation of annealing oxides at the surface of the steel sheet is suppressed and a uniform zinc plating layer is formed, and alloying of the zinc plating layer is promoted during press-processing heat treatment. Cracking in the steel foundation plate during hot press molding is prevented.
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申请公布号 |
US2012267012(A1) |
申请公布日期 |
2012.10.25 |
申请号 |
US201013518904 |
申请日期 |
2010.12.28 |
申请人 |
SOHN IL-RYOUNG;KIM JONG-SANG;PARK JOONG-CHUL;CHO YEOL-RAE;OH JIN-KEUN;CHO HAN-GU;CHUNG BONG-HOON;LEE JONG-SEOG;POSCO |
发明人 |
SOHN IL-RYOUNG;KIM JONG-SANG;PARK JOONG-CHUL;CHO YEOL-RAE;OH JIN-KEUN;CHO HAN-GU;CHUNG BONG-HOON;LEE JONG-SEOG |
分类号 |
B32B15/04;C23C8/00 |
主分类号 |
B32B15/04 |
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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