STEEL SHEETS FOR HOT STAMPING, METHOD FOR MANUFACTURING SAME, AND METHOD FOR MANUFACTURING HIGH-STRENGTH PARTS
    3.
    发明公开
    STEEL SHEETS FOR HOT STAMPING, METHOD FOR MANUFACTURING SAME, AND METHOD FOR MANUFACTURING HIGH-STRENGTH PARTS 有权
    FOR HOT钢板成型,工艺用于生产和钢板生产高强度热成型部件采用

    公开(公告)号:EP2684972A1

    公开(公告)日:2014-01-15

    申请号:EP11860663.1

    申请日:2011-03-09

    摘要: The present invention has as its object the provision of steel sheet for hot stamping use which is excellent in part strength after hot stamping and delayed fracture resistance comprised of large C content high strength steel sheet in which effective hydrogen traps are formed in the steel material.
    The steel sheet of the present invention solves this problem by forming Fe-Mn-based composite oxides in the steel sheet and trapping hydrogen at the interfaces of the composite oxides and matrix steel and in the voids around the composite oxides.
    Specifically, it provides steel sheet for hot stamping use which is comprised of chemical ingredients which contain, by mass%, C: 0.05 to 0.40%, Si: 0.02% or less, Mn: 0.1 to 3%, S: 0.02% or less, P: 0.03% or less, Al: 0.005% or less, Ti: 0.01% or less, N: 0.01% or less, one or both of Cr and Mo in a total of 0.005 to 1%, and O: 0.003 to 0.03% and which have a balance of Fe and unavoidable impurities and which contains average diameter 0.1 to 15 µm Fe-Mn-based composite oxide particles dispersed in the steel sheet or furthermore has crushed voids around the composite oxide particles, a method of production of the same, and a method of production of a hot stamped high strength part.

    摘要翻译: 本发明的,其目的钢板热冲压使用中的所有其具有优异的热冲压和由大C含量高强度的钢板,其中有效的氢陷阱在钢材料形成的耐延迟断裂特性后部分强度的提供。 本发明的钢板,解决了这个问题,通过在钢板上形成的Fe-Mn系复合氧化物,在该复合氧化物与基体钢的界面俘获氢和在复合氧化物周围的空隙。 具体而言,它提供了钢板热冲压使用所有这一切由作为含有化学成分,以质量%计,C:0.05〜0.40%以下,Si:0.02%以下,Mn:0.1〜3%,S:0.02%以下 ,P:0.03%或以下,Al:0.005%或以下,Ti:0.01%以下,N:0.01%或更低的一种或在总共0.005至1%这两种Cr和Mo,和O:0.003〜 0:03%并且具有为Fe和不可避免的杂质的平衡并含有平均直径0.1至15微米的Fe-Mn类分散在钢板中的复合氧化物粒子或另外围绕复合氧化物颗粒更已经破碎空隙,生产的方法 相同的,并且生产的热压的高强度部的的方法。