低合金高强度双相耐磨钢热处理工艺研究  

Heat treatment of low-alloy high-strength bainite/martensite wear-resistant steel

作　　者：刘凯[1] 邵乙清 朱灵泉 张晶晶[1] 卢伟煜[1] 吴开明[1] 

机构地区：[1]武汉科技大学冶金工业过程系统科学湖北省重点实验室,湖北武汉430081 [2]中国浦发机械工业股份有限公司,上海200061

出　　处：《武汉科技大学学报》2010年第3期233-237,共5页Journal of Wuhan University of Science and Technology

基　　金：湖北省教育厅国际合作项目(200711001);中国浦发机械工业股份有限公司研究基金;教育部新世纪优秀人才支持计划项目(NCET-05-0680)

摘　　要：采用光学显微镜、电子显微镜和万能力学试验机对热处理后的低合金高强度双相耐磨钢试样进行组织观察和力学性能测试。结果表明,水淬后的试样微观组织为贝氏体-马氏体双相组织;250℃回火后的试样微观组织为回火马氏体和贝氏体;450℃和600℃回火后的试样微观组织分别为回火马氏体和贝氏体。水淬250℃回火后的试样具有最佳强度和塑性配比,其抗拉强度和屈服强度分别为1491.4 MPa和1264.6 MPa,HRC硬度为43,延伸率为9.42%。The microstructure of a low-alloy,high-strength,wear-resistant steel which was treated under different heat treatment conditions was observed by using optical microscope and scanning electron microscope（SEM）.It is found that the microstructure of the specimen which was quenched into water is a dual phase of martensite and bainite;that quenched and then tempered at 250 ℃ is predominantly tempered martensite;and that quenched and then tempered at 450 ℃ and 600 ℃ is tempered martensite and tempered bainite.The lath of martensite is merged under this heat treatment condition.The specimen which was quenched and then tempered at 250 ℃ has optimal mechanical properties,whose tensile and yield strength reach 1491.4 MPa and 1264.6 MPa,respectively,whose hardness reach 43 HRC,and whose elongation is 9.42%.

关 键 词：热处理 马氏体 贝氏体 回火 

分 类 号：TG156.5[金属学及工艺—热处理]