Influence of semi-solid isothermal treatment on eutectic carbide in Cr12MoV steel

作     者：Li Qingchun Yang Bo Li Chong Wang Chao Chang Guowei 

作者机构：School of Materials Science and Engineering Liaoning University of Technology 

出 版 物：《China Foundry》 (中国铸造（英文版）)

年 卷 期：2014年第11卷第6期

页      面：498-502页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financially supported by the National Natural Science Foundation of China(No.51204092) the Open Project of Shanghai Key Laboratory of Modern Metallurgy and Materials Processing(No.SELF-2012-02) 

主　　题：semi-solid state isothermal treatment eutectic carbide 

摘      要：In-situ observation of eutectic solidification of Cr12MoV steel was conducted using high temperature confocal laser-scanning microscopy. The semi-solid isothermal treatment temperature of the steel was determined by thermodynamic calculation using Thermo-cal software. At the same time, the influences of isothermal treatment temperature and time on eutectic carbides in the steel were also studied. The results show that when the liquid metal cools at the rate of 47 ℃·min^-1, the eutectic reaction occurs rapidly at 1,214.7 ℃ in one second with the reticular liquid around austenite dendrites, transforming into a network of eutectic structure. After being held at 1,300 ℃ for 30 min, the carbide network is broken due to the impingement of refined primary austenite dendrites and secondary dendrites arms, and the thickness of eutectic structure is reduced.