发明公开
EP2708613A4 HOT STAMP MOLDED ARTICLE, METHOD FOR PRODUCING HOT STAMP MOLDED ARTICLE, ENERGY ABSORBING MEMBER, AND METHOD FOR PRODUCING ENERGY ABSORBING MEMBER 审中-公开
HOT冲压成型,FOR HOT的制造方法冲压成形的主体,能量吸收元件及其制造方法的能量吸收构件

HOT STAMP MOLDED ARTICLE, METHOD FOR PRODUCING HOT STAMP MOLDED ARTICLE, ENERGY ABSORBING MEMBER, AND METHOD FOR PRODUCING ENERGY ABSORBING MEMBER
摘要:
A hot stamped article has a component composition containing, in terms of % by mass, 0.002% to 0.1% of C, 0.01% to 0.5% of Si, 0.5% to 2.5% of Mn+Cr, 0.1% or less of P, 0.01% or less of S, 0.05% or less of t-Al, 0.005% or less ofN, and 0.0005% to 0.004% of B which is optionally contained in a case where the Mn+Cr is 1.0% or more, the remainder being Fe and unavoidable impurities. The hot stamped article has a microstructure composed of, in terms of an area ratio, 0% or more and less than 90% of martensite, 10% to 100% of bainite, and less than 0.5% of unavoidable inclusion structures, or a microstructure composed of, in terms of an area ratio, 99.5% to 100% of bainitic ferrite, and less than 0.5% of unavoidable inclusion structures.
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