表面微弧处理对QT600-3组织及性能的影响研究  

Effects of Micro Arc Strengthening on Microstructure and Properties of QT600-3

作　　者：赵帅 ZHAO Shuai(Hebi Institute of Engineering and Technology,Henan Polytechnic University,Hebi 458030,China)

机构地区：[1]河南理工大学鹤壁工程技术学院,河南鹤壁458030

出　　处：《材料保护》2021年第2期113-117,121,共6页Materials Protection

基　　金：河南省科技攻关研究项目(182102210086)资助。

摘　　要：球磨铸铁QT600-3可制作曲轴、凸轮轴、连杆轴、齿轮、液压缸等,不仅要求相应的硬度和强度,还需要良好的耐磨损、抗表面疲劳性能。对QT600-3表面进行微弧强化,通过正交试验结果表明:强化电流19 kA,工件转速0.7 r/min,接触压力600 N时,QT600-3表面形成了由均匀细小的马氏体、渗碳体和残余奥氏体组成的白亮层;该强化层硬度可达850 HV2N;摩擦磨损试验证实该层提升了材料的耐磨损性能。The cast iron QT600-3 can make crankshaft,camshaft,connecting rod shaft,gear,hydraulic cylinder,etc. It requires not only corresponding hardness and strength,but also good wear resistance and surface fatigue resistance. The micro-arc hardening was carried out on the surface of QT600-3. Results of orthogonal test showed that when the current was 19 kA,the speed of work piece was 0.7 r/min and the contact pressure was 600 N,a white layer composed of uniform and fine martensite,cementite and retained austenite was formed on the surface of QT600-3. The hardness of the hardened layer reached 850 HV2N. Friction and wear tests showed that the layer greatly improved the wear resistance of the material.

关 键 词：微弧强化 QT600-3 显微组织 力学性能 

分 类 号：TG174[金属学及工艺—金属表面处理]