QUENCHED STEEL SHEET HAVING EXCELLENT HOT PRESS FORMABILITY, AND METHOD FOR MANUFACTURING SAME
    2.
    发明公开
    QUENCHED STEEL SHEET HAVING EXCELLENT HOT PRESS FORMABILITY, AND METHOD FOR MANUFACTURING SAME 有权
    VERGÜTETESSTAHLBLECH MIT HERVORRAGENDER HEISSPRESSFORMBARKEIT UND HERSTELLUNGSVERFAHRENDAFÜR

    公开(公告)号:EP2527481A1

    公开(公告)日:2012-11-28

    申请号:EP09848345.6

    申请日:2009-12-30

    摘要: This invention relates to a quenchable steel sheet having hot press workability and a method of manufacturing the same. The quenchable steel sheet has an alloy composition including carbon (C) in an amount of 0.15 ∼ 0.30 wt%, silicon (Si) in an amount of 0.05 ∼ 0.5 wt%, manganese (Mn) in an amount of 1.0 ∼ 2.0 wt%, boron (B) in an amount of 0.0005 ∼ 0.0040 wt%, sulfur (S) in an amount of 0.003 wt% or less, phosphorus (P) in an amount of 0.012 wt% or less, one or more selected from among calcium (Ca) in an amount of 0.0010 ∼ 0.0040 wt% and copper (Cu) in an amount of 0.05 - 1.0 wt%, two or more selected from among cobalt (Co), zirconium (Zr) and antimony (Sb), and iron (Fe) and other inevitable impurities, in which alloy elements are controlled to increase hot ductility and enabling pressing at 600 - 900°C, so that a plating layer is protected and a tensile strength of 1400 MPa or more and an elongation of 8% or more are obtained after pressing.

    摘要翻译: 本发明涉及一种具有热压加工性的淬火钢板及其制造方法。 淬火钢板具有含有0.15〜0.30重量%的碳(C),0.05〜0.5重量%的硅(Si),1.0〜2.0重量%的锰(Mn) ,硼(B)的量为0.0005〜0.0040重量%,硫(S)的含量为0.003重量%以下,磷(P)的含量为0.012重量%以下,选自钙 (Ca)为0.0010〜0.0040重量%,铜(Cu)为0.05〜1.0重量%,选自钴(Co),锆(Zr)和锑(Sb)中的2种以上,铁 (Fe)等不可避免的杂质,其中控制合金元素以增加热延展性并且能够在600-900℃下进行压制,从而保护镀层,并且拉伸强度为1400MPa以上,伸长率为8% 或更多。