High-strength steel sheet with excellent warm workability
    7.
    发明授权
    High-strength steel sheet with excellent warm workability 有权
    高强度钢板具有优良的温加工性

    公开(公告)号:US08932414B2

    公开(公告)日:2015-01-13

    申请号:US13634614

    申请日:2011-03-22

    摘要: Disclosed is a high-strength steel plate with excellent warm workability that has a component composition comprising, in mass %, 0.05 to 0.4% C, 0.5 to 3% Si+Al, 0.5 to 3% Mn, no more than 0.15% P (not including 0%), and no more than 0.02% S (including 0%), with the remainder comprising iron and impurities, and a composition that includes a total of 45 to 80% martensite and/or bainitic ferrite in terms of the area ratio relative to the entire composition, 5 to 40% polygonal ferrite in terms of the area ratio relative to the entire composition, and 5 to 20% retained austenite in terms of the area ratio relative to the entire composition, wherein the C concentration (CγR) within said residual austenite is in the range of 0.6 mass % to less than 1.0 mass %, and that furthermore may include bainite. In the high-strength steel plate, TRIP effects are achieved to the fullest extent in warm working, and increased ductility over prior steel plates is reliably achieved.

    摘要翻译: 公开了一种具有优异的温加工性的高强度钢板,其具有以质量%计含有0.05〜0.4%的C,0.5〜3%的Si + Al,0.5〜3%的Mn,0.15%以下的P( 不包括0%)和不超过0.02%的S(包括0%),剩余部分包括铁和杂质,以及包括总共45-80%的马氏体和/或贝氏体铁素体的组合物的面积 相对于整个组合物的比率,相对于组合物的面积比为5〜40%的多边形铁素体,相对于组合物的面积比为5〜20%的残留奥氏体,其中C浓度 )在0.6质量%以下且小于1.0质量%的范围内,并且还可以包括贝氏体。 在高强度钢板中,TRIP效果在温暖加工中达到最大程度,并且可靠地实现了比现有钢板更高的延展性。

    HIGHLY FORMABLE HIGH-STRENGTH STEEL SHEET, WARM WORKING METHOD, AND WARM-WORKED AUTOMOBILE PART
    10.
    发明申请
    HIGHLY FORMABLE HIGH-STRENGTH STEEL SHEET, WARM WORKING METHOD, AND WARM-WORKED AUTOMOBILE PART 审中-公开
    高强度高强度钢板,温度工作方法和温度自动化部件

    公开(公告)号:US20130236350A1

    公开(公告)日:2013-09-12

    申请号:US13988382

    申请日:2011-11-16

    摘要: A high-strength steel sheet has a chemical composition including 0.05% to 0.3% of C, 1% to 3% of Si, 0.5% to 3% of Mn, 0% to 0.1% of P, 0.001% to 0.1% of Al, and 0.002% to 0.03% of N, in mass percent; further includes iron and impurities; and has a structure including 50% to 90% of bainitic ferrite, 5% to 20% of retained austenite (γR), a total of 10% to 50% of martensite and the retained austenite, and 0% to 40% of polygonal ferrite, in area percent based on the entire structure. The retained austenite has a carbon content (CγR) of 0.5% to 1.2% by mass, an average equivalent circle diameter of 0.2 to 2 μm, and an average aspect ratio (maximum diameter/minimum diameter) of less than 3.0. The high-strength steel sheet excels both in elongation and deep drawability while having a strength of 980 MPa or more.

    摘要翻译: 高强度钢板具有C:0.05〜0.3%,Si:1〜3%,Mn:0.5〜3%,P:0〜0.1%,Al:0.001〜0.1% ,以质量%计,N:0.002〜0.03% 进一步包括铁和杂质; 并且具有包括50%至90%的贝氏体铁素体,5%至20%的残留奥氏体(γR),总共10%至5​​0%的马氏体和残余奥氏体以及0%至40%的多边形铁素体 ,占整个结构的面积百分比。 残留奥氏体的碳含量(CgammaR)为0.5〜1.2质量%,平均当量圆直径为0.2〜2μm,平均纵横比(最大直径/最小直径)小于3.0。 高强度钢板的强度为980MPa以上,伸长率和深冲性均优异。