1.6%C超高碳钢显微组织与性能研究  

Microstructure and Properties of 1.6%C Ultra-high Carbon Steel

作　　者：樊亚军[1] 蔺卫平[1] 张占领[1] 朱杰武[1] 柳永宁[1] 

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

出　　处：《热加工工艺》2006年第2期8-10,共3页Hot Working Technology

基　　金：陕西省科技攻关资助项目(2004K07-G18)

摘　　要：对1.6%C超高碳钢进行离异共析和淬火+高温回火两种工艺球化预处理,获得了铁素体基体上分布超细碳化物组织,在此基础上进行了两类淬火处理。显微组织观察分析表明:淬火组织亚结构为位错与孪晶并存;采用感应加热淬火时随感应加热淬火次数增加,板条马氏体增加,孪晶马氏体减少。力学性能测试显示:本试验用超高碳钢强度与中碳结构钢相当;塑性很好,伸长率达17%。Heat treatments of DET（Divorced Eutectoid Transformation） and quenching＋tempering were carded out to obtain the microstructure of ferrite with ultra-fine carbides for a 1.6% C ultra-high carbon steel. Simultaneously microstructure of quenched steel was observed by transmission election microscope. It is shown that the sub-structure is composed of dislocations and twins. When increasing the time of inducing-heat quenching, the steel shows that the quantity of lath martensite increases but decreases with twin martensite. The mechanical properties are measured to indicate that the ultra-high carbon steel has almost the same intensity as structure steels with moderate carbon and good plasticity, with extension rate 17%.

关 键 词：超高碳钢 离异共析 亚结构 力学性能 

分 类 号：TG142.1[一般工业技术—材料科学与工程]