HIGH STRENGTH THIN STEEL SHEET EXCELLING IN WELDABILITY AND PROCESS FOR PRODUCING THE SAME
    1.
    发明申请
    HIGH STRENGTH THIN STEEL SHEET EXCELLING IN WELDABILITY AND PROCESS FOR PRODUCING THE SAME 审中-公开
    高强度钢板在焊接性能及其制造方法中的应用

    公开(公告)号:US20110017363A1

    公开(公告)日:2011-01-27

    申请号:US12810852

    申请日:2008-08-08

    IPC分类号: C21D8/02 C22C38/12 C22C38/14

    摘要: Provided are a high strength thin steel sheet having tensile strength of about 800 MPa or more, and a manufacturing method thereof. The thin steel sheet is mainly used for construction materials, home appliances, and automobiles. The thin steel sheet has excellent plating characteristic, welding characteristic, bending workability, and hole expansion ratio. The thin steel sheet includes, in weight %, C: 0.02-0.20%, Si: 1.5% or less, Mn: 1.5-3.0%, P: 0.001-0.10%, S: 0.010% or less, SoLAl: 0.01-0.40%, N: 0.020% or less, Cr: 0.3-1.5%, B: 0.0010-0.0060%, Sb: 0.001-0.10%, and including at least one material selected from the group consisting of Ti: 0.003-0.08%, Nb: 0.003-0.08%, and Mo: 0.003-0.08%, and includes Fe and other inevitable impurities as a remainder. Here, Si, Mn, B, Sb, P, and S meet conditions of 5

    摘要翻译: 本发明提供一种拉伸强度为约800MPa以上的高强度薄钢板及其制造方法。 薄钢板主要用于建筑材料,家用电器和汽车。 薄钢板具有优异的电镀特性,焊接特性,弯曲加工性和孔膨胀率。 该薄钢板以重量%计含有C:0.02-0.20%,Si:1.5%以下,Mn:1.5-3.0%,P:0.001-0.10%,S:0.010%以下,SoLAl:0.01-0.40 %,N:0.020%以下,Cr:0.3〜1.5%,B:0.0010〜0.0060%,Sb:0.001-0.10%,并且包括选自Ti:0.003-0.08%,Nb :0.003-0.08%,Mo:0.003-0.08%,其余为Fe等不可避免的杂质。 这里,Si,Mn,B,Sb,P和S满足5 <(Si / Mn + 150B)/ Sb <20和C + Mn / 20 + Si / 30 + 2P + 4S <0.27的条件。 此外,制造方法可以确保薄钢板的可加工性。