热处理工艺对超高碳钢组织与力学性能的影响  

Influence of Heat-treatment Technology on the Microstructure and Mechanical Properties of Ultra-high Carbon Steel

作　　者：蔺卫平[1] 樊亚军[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：《机械工程材料》2007年第2期40-42,共3页Materials For Mechanical Engineering

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);宁夏高校科研基金项目(JY2004)

摘　　要：研究了热处理工艺对碳含量为1．6％超高碳钢组织和力学性能的影响。结果表明:用离异共析转变工艺可使锻造组织中的碳化物得到球化,获得铁素体基体上弥散分布球状碳化颗粒的组织;在随后进行的第二次热处理中,采用正火和淬火+回火工艺,可使超高碳钢获得良的综合力学性能,其屈服强度和抗拉强度都比40CrNiMo钢调质态提高很多,而塑性与40CrNiM钢相当。The microstructure and mechanical properties of an ultra-high carbon steel （UHCS） containing 1. 6wt% carbon were studied. The carbide in the forged state is spheroidized through the process of divorcedeutectoid transformation （DET） and fine carbide particles distributing dispersedly in ferrite matrix were formed. The following second heat treatment includeing normalizing and quenching with tempering make. The UHCS obtain excellent mechanical properties. The yield strength and tensile strength of UHCS are higher than those of 40CrNiMo, and the plasticity of UHCS is equal to that of 40CrNiMo.

关 键 词：超高碳钢 离异共析转变 球化工艺 

分 类 号：TG142.1[一般工业技术—材料科学与工程]