贝氏体等温工艺对3Cr2MoCoWV热作模具钢组织和性能的影响  

EFFECT OF ISOTHERMAL BAINITIC TREATMENT ON MICROSTRUCTURE AND PROPERTIES OF 3Cr2MoCoWV HOT WORKING DIE STEELS

作　　者：朱利娟[1] 闵娜[1] 计天予[1] 吴晓春[1] 

机构地区：[1]上海大学材料科学与工程学院,上海200072

出　　处：《上海金属》2011年第6期6-9,共4页Shanghai Metals

基　　金："十一五"国家科技支撑计划课题:高品质模具钢锻材关键技术开发(2007BAE51B04);上海市重点学科建设项目(S30107)

摘　　要：研究了贝氏体等温工艺对3Cr2MoCoWV热作模具钢组织和性能的影响,并与常规淬、回火处理的性能进行对比。研究表明:3Cr2MoCoWV钢经贝氏体等温处理后有大量稳定存在的残余奥氏体,经回火后残余奥氏体以薄膜状存在于马氏体板条间。经380℃等温1 h后再回火,可比常规淬、回火处理获得更好的强韧性配合。Effect of isothermal bainitic treatment on microstructure and properties of 3Cr2MoCoWV hot working die steels was investigated,and compared with the samples from traditional treatment.The results showed that large amount of stable retained austenite existed in 3Cr2MoCoWV steel after isothermal bainitic treatment.The retained austenite existed as thin film between the martensite laths after tempering.The strength and toughness of the tested steel was higher than that of the traditional ones in which the isothermal treatment was carried out at 380 ℃ for 1 h.

关 键 词：热作模具钢 贝氏体等温 残余奥氏体 强韧性 

分 类 号：TG161.8[金属学及工艺—热处理]