热处理对9Ni钢低温韧性的影响  

Effect of Heat Treatment on Low Temperature Toughness of 9Ni Steel

作　　者：李志海 樊湘芳[1] 龚仁政 陈鹏 邓洪举 付倩南 LI Zhihai;FAN Xiangfang;GONG Renzheng;CHEN Peng;DENG Hongju;FU Qiannan(Department of Mechanical Engineering, University of South China, Hengyang 421001, China)

机构地区：[1]南华大学机械工程学院,湖南衡阳421001

出　　处：《机械工程师》2018年第3期86-87,90,共3页Mechanical Engineer

基　　金：湖南省大学生研究性学习和创新性实验计划项目(湘教通[2016]283号);湖南省质量工程项目:南华大学-南岳电控(衡阳)工业技术有限公司机械类专业校企合作人才培养示范基地(湘教通[2014]272号)

摘　　要：对9Ni钢进行QT热处理,采用金相显微镜进行金相组织观察和分析、触摸屏显PLC控制冲击试验机进行低温冲击试验、XRD衍射仪进行物相分析。实验结果表明,9Ni钢经QT热处理后低温冲击功有较大提高,试验组的平均值约为原始组的3倍,其低温韧性提高的主要原因是有逆转奥氏体生成。The9Ni steel is treated by QT heat treatment.Metallographic microscope is used to observe and analyze the microstructure.And the touch screen controlled PLC impact test machine is used to carry out the low temperature impact test,what is more,the phase analysis is carried out by XRD diffractometer.The experimental results show that the impact low temperature toughness of9Ni steel is obvious improved after QT heat treatment,and the average of experimental group is about3times that of the original group.The main reason for that is because of the formation of reversed austenite.

关 键 词：QT热处理 9NI钢 低温韧性 

分 类 号：TG161[金属学及工艺—热处理]