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    High-strength steel sheet highly resistant to dynamic deformation and excellent in workability and process for the production thereof
    1.
    发明授权
    High-strength steel sheet highly resistant to dynamic deformation and excellent in workability and process for the production thereof 有权
    高强度钢板高度抗动态变形，加工性优良，制造方法优异

    公开(公告)号：US06544354B1

    公开(公告)日：2003-04-08

    申请号：US09355435

    申请日：1999-07-28

    申请人： Osamu Kawano ,  Junichi Wakita ,  Yuzo Takahashi ,  Hidesato Mabuchi ,  Manabu Takahashi ,  Akihiro Uenishi ,  Yukihisa Kuriyama ,  Riki Okamoto ,  Yasuharu Sakuma

    发明人： Osamu Kawano ,  Junichi Wakita ,  Yuzo Takahashi ,  Hidesato Mabuchi ,  Manabu Takahashi ,  Akihiro Uenishi ,  Yukihisa Kuriyama ,  Riki Okamoto ,  Yasuharu Sakuma

    IPC分类号： C22C3804

    CPC分类号： C21D8/0226 ,  C21D8/0426 ,  C21D8/0436 ,  C21D9/46 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005

    摘要： The object of the present invention is to provide high-strength steel sheets exhibiting high impact energy absorption properties, as steel sheets to be used for shaping and working into such parts to front side members which absorb impact energy upon collision, as well as a method for their production. The high-strength steel sheets of the invention which exhibit high impact energy absorption properties are press formable high-strength steel sheets with high flow stress during dynamic deformation characterized in that the microstructure of the steel sheets in their final form is a composite microstructure of a mixture of ferrite and/or bainite, either of which is the dominant phase, and a third phase including retained austenite at a volume fraction between 3% and 50%, wherein the difference between the static tensile strength as when deformed in a strain rate range of 5×10−4˜5×10−3 (l/s) after pre-deformation at an equivalent strain of greater than 0% and less than or equal to 10%, and the dynamic tensile strength &sgr;d when deformed at a strain rate of 5×102˜5×103 (l/sec) after the pre-deformation, i.e. &sgr;d−&sgr;s, is at least 60 MPa, and the work hardening coefficient between 5% and 10% of a strain is at least 0.130.

    摘要翻译： 本发明的目的是提供一种表现出高冲击能吸收性能的高强度钢板，作为用于成形和加工成这些部件的钢板，该前端侧构件在碰撞时吸收冲击能量，以及方法 为他们的生产。 表现出高冲击能吸收性能的本发明的高强度钢板是动态变形时具有高流动应力的可压制高强度钢板，其特征在于，最终形式的钢板的微结构是 铁素体和/或贝氏体的混合物，其中的任一种是主要相，第三相包括体积分数在3％至50％之间的残余奥氏体，其中在应变速率范围内变形时的静态拉伸强度之间的差异 在大于0％且小于或等于10％的等效应变下预变形后为5×10 -4〜5×10 -3（1 / s），当应变速率为5×102〜 在预变形之后的5×10 3（1 / sec），即Sigmad-sigmas，至少为60MPa，并且应变的5％和10％之间的加工硬化系数为至少0.130。

    High-strength steel plate having high dynamic deformation resistance and method of manufacturing the same
    2.
    发明授权
    High-strength steel plate having high dynamic deformation resistance and method of manufacturing the same 有权
    具有高动态变形阻力的高强度钢板及其制造方法

    公开(公告)号：US06319338B1

    公开(公告)日：2001-11-20

    申请号：US09308986

    申请日：1999-07-06

    申请人： Osamu Kawano ,  Yuzo Takahashi ,  Junichi Wakita ,  Hidesato Mabuchi ,  Manabu Takahashi ,  Akihiro Uenishi ,  Riki Okamoto ,  Yukihisa Kuriyama ,  Yasuharu Sakuma

    发明人： Osamu Kawano ,  Yuzo Takahashi ,  Junichi Wakita ,  Hidesato Mabuchi ,  Manabu Takahashi ,  Akihiro Uenishi ,  Riki Okamoto ,  Yukihisa Kuriyama ,  Yasuharu Sakuma

    IPC分类号： C22C3308

    CPC分类号： C21D8/02 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0273 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008

    摘要： The object of the present invention is to provide high-strength steel sheets exhibiting high impact energy absorption properties, as steel materials, to be used for shaping and working into such parts as front side members of automobiles which absorb impact energy upon collision, as well as a method for their production. The high-strength steel sheets of the invention which exhibit high impact energy absorption properties are high-strength steel sheets with high flow stress during dynamic deformation characterized in that the microstructure of the steel sheets in their final form is a composite microstructure of a mixture of ferrite and/or bainite, either of which is the dominant phase, and a third phase including retained austenite at a volume fraction between 3% and 50%, wherein the average value &sgr;dyn (MPa) of the flow stress in the range of 3˜10% of equivalent strain when deformed in a strain rate range of 5×102˜5×103 (1/sec) after pre-deformation of greater than 0% and less than or equal to 10% of equivalent strain, satisfies the inequality: &sgr;dyn≧0.766×TS+250 as expressed in terms of the maximum stress TS (MPa) in the static tensile test as measured in a strain rate range of 5×10−4˜5×10−3 (1/s) without deformation, and the work hardening coefficient between 1% and 5% of a strain is at least 0.080.

    摘要翻译： 本发明的目的是提供作为钢材的高冲击能量吸收性能的高强度钢板，用于成形和加工成在碰撞时吸收冲击能量的汽车前侧部件的部件，以及 作为其生产方法。 表现出高冲击能吸收性能的本发明的高强度钢板是在动态变形过程中具有高流动应力的高强度钢板，其特征在于，最终形式的钢板的微结构是复合组织， 铁素体和/或贝氏体，其中任何一个是主要相，第三相包括体积分数在3％至50％之间的残余奥氏体，其中流动应力的平均值sigmadyn（MPa）在3〜 在大于0％且小于等于等效应变的10％的预变形后，在5×102〜5×103（1 / sec）的应变速率范围内变形时的10％的当量应变满足以下不等式：sigmadyn> = 0.766 在静态拉伸试验中以5×10 -4〜5×10 -3（1 / s）的应变速度范围测定的无变形的最大应力TS（MPa）表示的xTS + 250，加工硬化系数1 ％和5％的菌株在leas t 0.080。