High toughness steel and a method for manufacturing the same
    2.
    发明授权
    High toughness steel and a method for manufacturing the same 失效
    高韧性钢及其制造方法

    公开(公告)号:US06348108B1

    公开(公告)日:2002-02-19

    申请号:US09260056

    申请日:1999-03-02

    IPC分类号: C22C3804

    摘要: Ups and downs having a cycle of not more than 5 &mgr;m and an amplitude of not less than 200 nm are formed in a part of not less than 70% per unit length of a prior-austenite grain boundary which is observed in a linear form when seen from a vertical plane by a series of steps of subjecting a steel in a state of austenite to a deformation in not less than 30% of a total area reduction rate at a temperature region which is lower than recrystallization temperature of austenite, and subsequently cooling a deformed steel without causing neither recrystallization nor phase transformation of a diffusion type.

    摘要翻译: 具有不大于5um的周期和不小于200nm的振幅的上升和下降部分以不小于70%的单位长度的先前奥氏体晶界形成,其以线性形式观察到, 从垂直平面观察,通过一系列步骤,使奥氏体状态的钢在奥氏体的再结晶温度以下的温度区域以不低于总面积减少率的30%的变形量进行变形,随后冷却 变形钢不会引起再结晶也不引起扩散型的相变。