摘要
介绍一种Q235钢表面进行双层辉光离子渗Cr方法,表面Cr含量达到40%左右。然后进行超饱和渗C,形成高Cr高C表面合金化层。表面含碳量达到2.7%左右,超过平衡碳计算值。随后进行淬火+低温回火热处理,使表面合金层获得马氏体基体上均匀分布的细小弥散碳化物组织,没有共晶莱氏体。经X射线衍射分析,合金化层碳化物类型为M_(23)C_6、M_7C_3,尺寸1～2μm,表面硬度达到1200HV左右。将双层辉光离子渗Cr+渗C淬火试样,进行摩擦因数和耐磨性能试验,结果表明,高Cr高C合金化层的平均摩擦因数为0.11,相对耐磨性是Q235钢渗C淬火试样的1.83倍。
A high chromium and high carbon alloy layer was produced on Q235 steel with the double glow plasma metallurgy.The fundamental principle was that alloying element Cr was penetrated into the Q235 steel in a vacuum chamber by glow discharge sputtering so that the content of Cr alloyed layer was about 40% on the surface of Q235 steel.Then ultra-saturation carbonization made surface carbon content 2.7% around exceeding balancing carbon calculating values.Subsequently by quenching and low-tempering treatment the martensite matrix on which uniform, compact and dispersing carbide structure distributed was formed without eutectic ledeburite on the surface alloyed layer.It was analyzed by X-ray diffraction that the types of layers carbide were M_(23)C_6,and M_7C_3,which dimension was 1～2μm and the surface hardness reached 1200HV around.The abrasion experiments were carried out on the high chromium and high carbon sample and Q235 steel carburized+quenched+low-tempered samples.The results indicated that the sliding friction coefficient was 0.11 and the wearability is more than 0.83 times in comparison with Q235 steel carburized+quenched+low-tempered.
出处
《金属热处理》
CAS
CSCD
北大核心
2007年第z1期390-393,共4页
Heat Treatment of Metals
基金
广西研究生教育创新计划资助项目
关键词
渗Cr
等离子
摩擦系数
耐磨性
chromium impregnation
plasma
friction coefficient
wear resistance
作者简介
徐晋勇(1962-),男,高级工程师,博士研究生,主要从事金属材料表面冶金的研究,联系电话:0773-5601310 E-mail:xujinyong62@163.com
