超高碳钢球化组织与性能研究  

Study on Spheroidizing Structure and Properties of Ultrahigh Carbon Steel

作　　者：曹海玲[1] 张占领[1] 朱杰武[1] 柳永宁[1] 许雁[2] 

机构地区：[1]西安交通大学金属材料强度国家重点实验室,陕西西安710049 [2]西北第二民族学院材料科学与工程系,宁夏银川750021

出　　处：《热加工工艺》2007年第16期19-21,共3页Hot Working Technology

基　　金：国家自然科学基金资助项目(50571077);陕西省科技攻关资助项目(2004KD7-G18)

摘　　要：对一种含碳量为1.41%的超高碳钢分别采用离异共析(DET)和淬火+高温回火工艺球化后进行组织和力学性能研究。结果表明:球化处理后锻造组织中的碳化物得到充分球化,获得了铁素体基体上弥散分布超细球状碳化物的组织;其屈服强度和抗拉强度都有明显提高,伸长率达到17.5%,是一种优良的结构钢材料;超高碳钢拉伸过程中裂纹容易在大颗粒碳化物处萌生并扩展。An ultrahigh carbon steel containing 1.41% carbon （mass fraction） was spheroidized by the divorced eutectoid annealing technique and quenching plus tempering technique, respectively. The microstructure and mechanical properties of the steel was investigated. The results indicate that carbides are spheroidized enough after spheroidized treatment, a structure of ferrite with ultra-fine carbides is obtained; yield strength and ultimate strength are greatly improved, extension rate is up to 17.5%, the ultrahigh carbon steel has an excellent steel structure; initiation and propagation of short fatigue cracks occur in large carbides of the ultrahigh carbon steel.

关 键 词：超高碳钢 屈服强度 抗拉强度 伸长率 力学性能 

分 类 号：TG142.1[一般工业技术—材料科学与工程]