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1. 发明授权

US06723188B2 Steel workpiece oil quenching method 有权
标题翻译：钢工油淬火方法
公开(公告)号：US06723188B2
公开(公告)日：2004-04-20
申请号：US10067202
申请日：2002-02-07
申请人： Yoshikazu Shimosato , Saburo Ogawa , Kiyohiro Miyamoto
发明人： Yoshikazu Shimosato , Saburo Ogawa , Kiyohiro Miyamoto
IPC分类号： C21D118
CPC分类号： C21D1/20 , C21D1/58
摘要： A steel workpiece maintained at a specified quenching temperature is rapidly cooled to a temperature just above the martensite transformation start point (Ms point) by being immersed in a high-temperature quenching oil. Thereafter, the steel workpiece is taken out of the high-temperature quenching oil so as to be soaked by the heat possessed by the steel workpiece and subsequently cooled by being immersed in the high-temperature quenching oil. Through these processes, a temperature difference between steel workpieces or the portions of a steel workpiece in the martensite transformation stage is reduced, and a cooling speed in a high-temperature region (not lower than about 550° C.) is made to be a slow speed sufficient for restraining a thermal distortion, by which the quenching distortion and quenching variation can be reduced.
摘要翻译：保持在规定的淬火温度的钢制工件通过浸入高温淬火油中而迅速冷却到马氏体相变开始点（Ms点）以上的温度。然后，将钢制工件从高温淬火油中取出，使其被钢制工件所具有的热量浸泡，然后浸渍在高温淬火油中而冷却。通过这些工序，可减少钢制工件之间的温度差或马氏体相变阶段的钢制工件的部分的温度差，使高温区域（不低于约550℃）的冷却速度为缓慢的速度足以抑制热变形，由此可以降低淬火变形和淬火变化。

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