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心部余热回火法
met.
tempcore process
(【技】由比利时冶金研究中心开发成功的一种自热回火法。世界首台工业规模的心部余热回火设备于1975年在卢森堡阿尔贝德公司埃施希夫朗日厂投人运行。其主要原理是:当轧件离开热轧机后,即进人专用冷却系统,使轧件表面淬火成马氏体,而心部仍为奥氏体。轧件离开冷却系统后,其心部余热开始向表层扩散,使表层马氏体产生回火。因此,该工艺的完整名称应是:利用心部余热使表层马氏体回火的工艺。)
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