深冷处理对18Ni马氏体时效钢性能及组织的影响  

Effect of Deep Cryogenic Treatment on Properties and Microstructure of Maraging Steel 18Ni

作　　者：李俊琳 刘志坚 陈远星 LI Jun-lin;LIU Zhi-jian;CHEN Yuan-xing(Guangdong Iron&Steel Research Institute,Guangdong Guangzhou,510640,P.R.China)

机构地区：[1]广东省钢铁研究所,广东广州510640

出　　处：《南方金属》2021年第5期5-8,共4页Southern Metals

基　　金：广州市科技计划项目(201904010263);广东省科技计划项目(2017A070701042)。

摘　　要：通过采用固溶、深冷及时效等处理方式,对18Ni马氏体时效钢进行了不同热处理工艺试验,研究了深冷处理对18Ni马氏体时效钢性能及组织的影响。结果表明,18Ni马氏体时效钢经深冷处理后硬度能有效提高;随着深冷处理时间的延长,材料的性能仍有所提升。深冷处理能使材料中的残余奥氏体向马氏体转变,但不能完全消除残余奥氏体。In this paper,we used different heat treatment processes on maraging steel 18Ni,such as solid solution,deep cryogenic treatment and aging treatment.The effects of deep cryogenic treatment on the properties and microstructure of the steel were studied.The results show that the hardness of the steel can be improved effectively after cryogenic treatment.With the extension of cryogenic treatment time,the properties of the materials have been improved.The residual austenite can be transformed into martensite by cryogenic treatment,but cannot be completely eliminated.

关 键 词：18NI马氏体时效钢 深冷处理 性能 组织 残余奥氏体 

分 类 号：TG156.91[金属学及工艺—热处理] TG142.1[金属学及工艺—金属学]