淬、回火温度对含铈H13钢组织及硬度的影响  

Effect of quenching and tempering temperature on microstructure and hardness of hardened H13 steel with Ce

作　　者：陈朔 陈学敏 徐祺昊 杨礼林 唐祖川 赵莉萍[1] Chen Shuo;Chen Xuemin;Xu Qihao;Yang Lilin;Tang Zuchuan;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6期36-40,共5页Heat Treatment of Metals

基　　金：内蒙古自治区科技创新引导奖励资金项目(0902062001);内蒙古科技大学创新基金(2019QDL-B05)。

摘　　要：不同含量稀土Ce的H13钢在不同温度淬火30 min后空冷,不同温度二次回火2 h后空冷,进行组织观察和硬度测试。研究表明,淬火温度达到1040℃,基体组织和晶界处的碳化物减少,板条马氏体更清晰,回火温度在580℃时,显微组织为回火马氏体+回火托氏体,回火温度超过600℃,碳化物聚集长大,故最佳热处理工艺为1040℃淬火+580℃二次回火;稀土Ce含量为0.026%时,试验钢的晶粒最为细小,组织最为均匀,硬度最高,淬火硬度为650.6 HV30,回火硬度为391.4 HV30。H13 steel with different contents of rare earth Ce was austenitized at different temperatures for 30 min,air-cooling hardened,and then twice tempered at different temperatures for 2 h,air cooling,and then the structure observation and hardness test were carried out.The results shows that when the quenching temperature reaches 1040℃,the carbide on the matrix structure and grain boundary is reduced,and the lath martensite is clearer.When the tempering temperature is 580℃,the microstructure is tempered martensite+tempered troostite.When the tempering temperature exceeds 600℃,and the carbides gather and grow.Therefore,the best heat treatment process is quenched at 1040℃+twice tempered at 580℃.When the rare earth Ce content is 0.026%,the grain of the tested steel is the finest,the structure is the most uniform,the hardness is the highest,the quenching hardness is 650.6 HV30,and the tempering hardness is 391.4 HV30.

关 键 词：稀土Ce 淬火温度 回火温度 硬度 

分 类 号：TG151.2[金属学及工艺—热处理]