High-strength thin steel sheet
    7.
    发明授权
    High-strength thin steel sheet 有权
    高强度薄钢板

    公开(公告)号:US08673093B2

    公开(公告)日:2014-03-18

    申请号:US12513514

    申请日:2007-12-10

    摘要: The present invention is the thin steel sheet containing C, Si, Mn, P, S, Al, Mo, Ti, B, and N wherein a value Z calculated by the equation described below is 2.0-6.0, an area ratio against all the structure is 1% or above for retained austenite and 80% or above for total of bainitic ferrite and martensite, a mean axis ratio of the retained austenite crystal grain is 5 or above, and tensile strength is 980 MPa or above where Value Z=9×[C]+[Mn]+3×[Mo]+490×[B]+7×[Mo]/{100×([B]+0.001),and the thin steel sheet has 980 MPa or above tensile strength and enhanced hydrogen embrittlement resistance properties.

    摘要翻译: 本发明是含有C,Si,Mn,P,S,Al,Mo,Ti,B和N的薄钢板,其中由下述等式计算的值Z为2.0-6.0, 残留奥氏体的结构为1%以上,贝氏体铁素体和马氏体的总和为80%以上,残留奥氏体晶粒的平均轴比为5以上,拉伸强度为980MPa以上,其中,Z = 9 ×[C] + [Mn] + 3×[Mo] + 490×[B] +7×[Mo] / {100×([B] +0.001)),薄钢板的拉伸强度 并提高耐氢脆性。

    HIGH-STRENGTH THIN STEEL SHEET
    8.
    发明申请
    HIGH-STRENGTH THIN STEEL SHEET 有权
    高强度薄钢板

    公开(公告)号:US20100080728A1

    公开(公告)日:2010-04-01

    申请号:US12513514

    申请日:2007-12-10

    摘要: The present invention is the thin steel sheet containing C, Si, Mn, P, S, Al, Mo, Ti, B, and N wherein a value Z calculated by the equation described below is 2.0-6.0, an area ratio against all the structure is 1% or above for retained austenite and 80% or above for total of bainitic ferrite and martensite, a mean axis ratio of the retained austenite crystal grain is 5 or above, and tensile strength is 980 MPa or above. Value Z=9×[C]+[Mn]+3×[Mo]+490×[B]+7×[Mo]/{100×([B]+0.001)} Thus a high strength thin steel sheet with 980 MPa or above tensile strength and enhanced hydrogen embrittlement resistance properties can be provided. Also, in accordance with the present invention, the hot-rolled steel sheet for cold-rolling capable of manufacturing the high strength thin steel sheet with good productivity and having improved cold-rollability can be provided.

    摘要翻译: 本发明是含有C,Si,Mn,P,S,Al,Mo,Ti,B和N的薄钢板,其中由下述等式计算的值Z为2.0-6.0, 残留奥氏体的结构为1%以上,贝氏体铁素体和马氏体的总和为80%以上,残留奥氏体晶粒的平均轴比为5以上,拉伸强度为980MPa以上。 值Z = 9×[C] + [Mn] + 3×[Mo] + 490×[B] + 7×[Mo] / {100×([B] +0.001)}因此, 可以提供980MPa以上的拉伸强度和增强的耐氢脆性。 此外,根据本发明,可以提供能够以良好的生产率制造高强度薄钢板并具有改进的冷轧性能的用于冷轧的热轧钢板。