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研究了Ｃｅ对Ｍ２高速钢凝固组织的影响及其作用机制。发现Ｃｅ在高速钢中可减轻Ｗ，Ｍｏ等合金元素的偏析，使共晶碳化物量减少并细化；Ｃｅ主要偏聚在晶界共晶碳化物与奥氏体的界面上，并有部分Ｃｅ参与形成含Ｃｅ的Ｍ２Ｃ碳化物；Ｃｅ促进共晶碳化物在高温加热时的断网和团球化
The effect of Ce on the solidification structure of M2 high speed steel and its mechanism were studied. It is found that Ce can reduce the segregation of alloying elements such as W and Mo in high-speed steel and reduce and refine the eutectic carbide amount. Ce mainly segregates at the interface between the grain boundary eutectic carbide and austenite and has some Ce Participate in the formation of Ce-containing M2C carbides; Ce promotes eutectic carbides at high temperatures when the heating and breaking of the ball