High-strength steel sheet suitable for deep drawing and process for
producing the same
    1.
    发明授权
    High-strength steel sheet suitable for deep drawing and process for producing the same 失效
    适用于深冲的高强度钢板及其制造方法

    公开(公告)号:US5618355A

    公开(公告)日:1997-04-08

    申请号:US556962

    申请日:1995-12-12

    摘要: A high-strength steel sheet suitable for deep drawing, characterized by comprising 0.04 to 0.25 mass % of C and 0.3 to 3.0 mass %, in total, of at least one of Si and Al, the steel sheet having multiple phases structure comprising ferrite as a main phase (a phase having the highest volume fraction), not less than 3 vol. % of austenite, and bainite and martensite; said steel satisfying a requirement that a value obtained by dividing volume fraction of Vg (vol. %) of austenite before working by the content of C (mass %) contained in the whole steel, Vg/C, is 40 to 140, a requirement that Vp (volume fraction of austenite at the time of plane strain tensile deformation)/Vs (volume fraction of austenite at the time of shrink flanging deformation) is not more than 0.8, and a requirement represented by the formula220

    摘要翻译: PCT No.PCT / JP95 / 00832 Sec。 371 1995年12月12日第 102(e)日期1995年12月12日PCT 1995年4月26日PCT PCT。 WO95 / 29268 PCT出版物 日期:1995年11月2日适用于深拉深的高强度钢板,其特征在于,含有0.04〜0.25质量%的C和0.3〜3.0质量%的Si和Al中的至少一种,所述钢板具有多个 包含铁素体作为主相(具有最高体积分数的相),不小于3体积%的相结构。 %的奥氏体,贝氏体和马氏体; 所述钢满足以下要求:通过将在整个钢中含有的C(质量%)的含量Vg / C,将工作前奥氏体的Vg(体积%)的体积分数除以40〜140, Vp(平面应变拉伸变形时的奥氏体的体积分数)/ Vs(收缩凸缘变形时的奥氏体的体积分率)为0.8以下,由式220表示的要求

    Fracture prediction method, device, a program arrangement and computer-accessible medium therefor
    10.
    发明授权
    Fracture prediction method, device, a program arrangement and computer-accessible medium therefor 有权
    断裂预测方法,装置,程序布置和计算机可访问介质

    公开(公告)号:US08990028B2

    公开(公告)日:2015-03-24

    申请号:US12278117

    申请日:2007-02-01

    IPC分类号: G01L1/00 G01N3/00 G06F17/50

    摘要: According to exemplary embodiments of the present invention, using a fracture limit stress line obtained by converting a hole expansion ratio into a stress as a criterion for a fracture, the risk of fracture in a material can be evaluated quantitatively by comparing the relationship between data obtained from a numerical analysis using a finite element method and the fracture limit stress line. Thus, when determining a fracture limit in a stretch flange portion in a thin plate in a process including one or more deformation path variations, it is possible to obtain the fracture limit curve easily and efficiently and predict the fracture with high accuracy, and the risk of fracture upon press forming or crash can be evaluated.

    摘要翻译: 根据本发明的示例性实施例,使用通过将孔膨胀率转换为应力而获得的断裂极限应力线作为断裂的标准,可以通过比较获得的数据之间的关系来定量评价材料中的断裂风险 从使用有限元法的数值分析和断裂极限应力线。 因此,当在包括一个或多个变形路径变化的过程中确定薄板中的拉伸凸缘部分的断裂极限时,可以容易且有效地获得断裂极限曲线并且高精度地预测断裂,并且风险 可以评估压制成型或碰撞时的断裂。