热处理工艺对40Cr组织和摩擦性能的影响  

Effect of Heat Treatment Process on Microstructure and Frictional Properties of 40Cr Stell

作　　者：王瑞权[1] 韩秋华[1] 刘妍研[1] 夏霏霏[2] 邢博[1] 

机构地区：[1]兰州理工大学材料科学与工程学院,甘肃兰州730050 [2]哈尔滨理工大学材料科学与工程学院,黑龙江哈尔滨150080

出　　处：《热处理技术与装备》2010年第2期29-33,共5页Heat Treatment Technology and Equipment

摘　　要：研究了40Cr钢在不同热处理工艺下的组织和摩擦性能。结果表明,40Cr钢经过正火+淬火+中温回火后,组织为回火屈氏体;经过正火+超高温淬火+低温回火处理后,组织为晶粒相对较小的回火马氏体;正火+亚温淬火+低温回火后,组织为晶粒细小的回火马氏体。三种的热处理工艺比较得出,经正火+亚温淬火+低温回火处理后马氏体的晶粒较小,硬度较高,耐磨擦性能最佳。Mierostrueture and frictional properties on diferent heat treatment processes are investigated. It is showed that for 40Cr the tempered troostite is obtained after the normalizing ＋ quenching ＋ medium temperature tempering, and the tempered martensite with smaller grain after normalizing ＋ ultrahigh temperature quenching ＋ low temperature tempering, and the tempered martensite with fine grain after normalizing ＋ sub-temperature quenching ＋ low temperature tempering. It is gained the martensite with smaller grain, higher hardness and the best friction performance after normalizing ＋ sub-temperature quenching ＋ low-temperature tempering in the three kinds of heat treatment processes.

关 键 词：40CR钢 热处理 摩擦性能 

分 类 号：TG161[金属学及工艺—热处理]