| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-strength automobile component having excellent corrosion resistance after coating for manufacturing a member requiring high strength such as a reinforcement member of an automobile. SOLUTION: The high-strength automobile component having excellent corrosion resistance after coating is manufactured by preparing a steel sheet containing, by mass% 0.05-0.7% C,≤1% Si, 0.5-3% Mn,≤0.1% P,≤0.1% S,≤0.1% Al,≤0.01% N,≤0.5% Ti,≤2% Cr, and the balance Fe and inevitable impurities, heating it to≥800°C at a heating condition satisfying the following formulas (1): Y>574*exp(-0.030X) and (2): X/10<T<X, and press-forming it, so that the component has a hardened structure and an Fe-Al coating on the surface wherein an Al concentration of the surface phase of the Fe-Al coating is≥40% by mass%. COPYRIGHT: (C)2009,JPO&INPIT
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