稀土Ce对4Cr5MoSiV1钢组织的影响  

Effect of rare earth Ce on microstructure of 4Cr5MoSiV1 steel

作　　者：杨礼林 徐祺昊 赵莉萍[1] Yang Lilin;Xu Qihao;Zhao Liping(School of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou Inner Mongolia 014010,China)

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古包头014010

出　　处：《金属热处理》2023年第3期242-247,共6页Heat Treatment of Metals

基　　金：新型稀土模具钢的研究与开发(201/0902062001);内蒙古科技大学创新基金(2019QDL-B05)。

摘　　要：对不同稀土Ce含量的4Cr5MoSiV1试验钢经热加工处理后的显微组织进行了观察和分析,研究Ce含量对其显微组织的影响。结果表明,稀土Ce的加入,使4Cr5MoSiV1钢铸态、锻态、正火和球化退火态的组织得到改善,晶粒细化、夹杂物变性、成分偏析减轻、未溶碳化物消除。但当稀土Ce含量超过0.026%时,上述改善作用逐渐减弱,甚至起到恶化的效果。The microstructure of 4Cr5MoSiV1 tested steel with different Ce content after hot-working treatment was observed and analyzed,and the effect of Ce content on its microstructure was studied.The results show that the addition of rare earth Ce can improve the microstructure of the 4Cr5MoSiV1 steel as-cast,and after hot forging,normalizing and spheroidizing annealing,refine the grain,modify the inclusion,reduce the composition segregation and eliminate the undissolved carbide.However,when the content of rare earth Ce exceeds 0.026%,the above improvement effect will gradually weaken and even worsen.

关 键 词：热作模具钢 4CR5MOSIV1钢 稀土Ce 显微组织 

分 类 号：TG151.2[金属学及工艺—热处理]