公开(公告)号：US20110017368A1

公开(公告)日：2011-01-27

申请号：US12894363

申请日：2010-09-30

申请人： Tsukasa Okamura ,  Kengo Iwanaga ,  Osamu Watanabe ,  Jun-ichi Kodama ,  Daisuke Hirakami ,  Mikiyuki Ichiba ,  Yoshiharu Ueki

发明人： Tsukasa Okamura ,  Kengo Iwanaga ,  Osamu Watanabe ,  Jun-ichi Kodama ,  Daisuke Hirakami ,  Mikiyuki Ichiba ,  Yoshiharu Ueki

IPC分类号： C21D9/60 ,  C21D9/54 ,  C21D9/52 ,  C22C38/00 ,  C21D9/00 ,  C21D1/62

CPC分类号： C21D9/56 ,  C21D1/62 ,  C21D9/52 ,  C21D9/54 ,  C21D9/60 ,  C21D9/62 ,  C22C38/02 ,  C22C38/04 ,  C22C38/14 ,  Y02P10/253

摘要： According to one aspect of the present invention, there is provided a process of fabricating a steel material by performing a heat treatment to a steel material having high strength, in order to reduce hardness at one part of the steel material to less than hardness at other parts of the steel material, wherein the heat treatment comprises a heating step in which a portion having a certain depth from a surface of the steel material is rapidly heated by induction heating or direct energization heating, and a cooling step in which the steel material, which has been subject to the heating step, is rapidly cooled a predetermined time after the heating step, and a heating temperature in the heating step is Ac1 transforming point or more.

摘要翻译： 根据本发明的一个方面，提供了一种通过对具有高强度的钢材进行热处理来制造钢材的方法，以便将钢材的一部分处的硬度降低到低于其他部分的硬度 所述钢材的部分，其中所述热处理包括加热步骤，其中通过感应加热或直接加热加热具有来自所述钢材表面的一定深度的部分，以及冷却步骤， 经过加热步骤后，在加热步骤之后的预定时间内快速冷却，加热步骤中的加热温度为Ac1转化点以上。