Precipitation and hot deformation behavior of austenitic heat-resistant steels: A review

查看全文 作　　者：Yinghui [1,2]Zhou;Yongchang [1,3]Liu;Xiaosheng [1]Zhou;Chenxi [1]Liu;Jianxin [1,3]Yu;Yuan [1]Huang;Huijun [1]Li;Wenya [2]Li

机构地区：[1]State Key Lab of Hydraulic Engineering Simulation and Safety, School of Materials Science & Engineering, Tianjin University;[2]School of Materials Science & Engineering, Northwestern Polytechnical University;[3]Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai Jiao Tong University

出　　处：《Journal of Materials Science & Technology》索引2017年第33卷第12期,共9页

基　　金：the China National Funds for Distinguished Young Scientists(Grant No.51325401);the National Natural Science Foundation of China(Grant No.51474156 and U1660201);the National High Technology Research and Development Program of China(Grant No.2015AA042504)for grant and financial support 摘　　要：The austenitic heat resistant-steels have been considered as important candidate materials for advanced supercritical boilers, nuclear reactors, super heaters and chemical reactors, due to their favorable combination of high strength, corrosion resistance, perfect mechanical properties, workability and low cost.Since the precipitation behavior of the steels during long-term service at elevated temperature would lead to the deterioration of mechanical properties, it is essential to clarify the evolution of secondary phases in the microstructure of the steels. Here, a summary of recent progress in the precipitation behavior and the coarsening mechanism of various precipitates during aging in austenitic steels is made. Various secondary phases are formed under service conditions, like MX carbonitrides, M_(23)C_6 carbides, Z phase, sigma phase and Laves phase. It is found that the coarsening rate of M_(23)C_6 carbides is much higher than that of MX carbonitrides. In order to understand the thermal deformation mechanism, a constitutive equation can be established, and thus obtained processing maps are beneficial to optimizing thermal processing parameters, leading to improved thermal processing properties of steels. 关键词：奥氏体行为降水钢热处理参数评论耐热机械性质

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Precipitation and hot deformation behavior of austenitic heat-resistant steels: A review

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