碳氮共渗GCr15钢的组织及性能  

Microstructure and Properties of GCr15 Steel Carbonitided

作　　者：扈林庄[1,2,3] 王姗姗 王浩[1,2,3] 张朕 程彬[1,2,3] HU Linzhuang;WANG Shanshan;WANG Hao;ZHANG Zhen;CHENG Bin(Luoyang Bearing Research Institute Co.,Ltd.,Luoyang 471039,China;Henan Key Laboratory of High Performance Bearing Technology,Luoyang 471039,China;Strategic Alliance for Technology Innovation in Rolling Bearing Industry,Luoyang 471039,China)

机构地区：[1]洛阳轴承研究所有限公司,河南洛阳471039 [2]河南省高性能轴承技术重点实验室,河南洛阳471039 [3]滚动轴承产业技术创新战略联盟,河南洛阳471039

出　　处：《轴承》2023年第7期52-56,共5页Bearing

摘　　要：对高碳铬轴承钢GCr15进行碳氮共渗,从显微组织、硬度、残余奥氏体、应力状态等方面研究其组织和性能,研究表明:碳氮共渗后,GCr15钢制内圈表面可获得深度约为0.40 mm的碳氮共渗层,内圈表面组织为弥散分布的碳氮化合物组织,显微组织(晶粒度)为8级;内圈表面层存在含量大于20%的残余奥氏体,其随回火温度的升高而降低;表面层呈现压应力状态,成品内圈表面可获得一定深度的压应力层。The carbonitriding is conducted on high carbon chromium bearing steel GCr15.The microstructure and properties of the steel carbonitrided are studied from the aspects of microstructure,hardness,residual austenite and stress state.The results show that after carbonitriding,a carbonitriding layer with a depth of about 0.40 mm can be obtained on surface of GCr15 steel inner ring,the surface microstructure of inner ring is composed of dispersed carbon and nitrogen compounds,and the microstructure(grain size)is grade 8;there is residual austenite with a content greater than 20%in surface layer of inner ring,which decreases with the increase of tempering temperature;the surface layer presents compressive stress state,a certain depth of compressive stress layer can be obtained on surface of finished inner ring.

关 键 词：滚动轴承 高碳铬轴承钢 碳氮共渗 硬度 显微组织 残余奥氏体 应力 

分 类 号：TH133.33[机械工程—机械制造及自动化] TG156.8[金属学及工艺—热处理]