H13钢表面镀铬和气体渗氮复合处理的组织及性能  

Microstructure and properties of H13 steel treated by chromium plating and gas nitriding

作　　者：李春明[1] 朱伟恒[1] 焦东玲[1] 魏兴钊[1] Li Chunming;Zhu Weiheng;Jiao Dongling;Wei Xingzhao(School of Materials Science and Engineering,South China University of Technology,Guangzhou Guangdong 510640,China)

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640

出　　处：《金属热处理》2020年第5期5-11,共7页Heat Treatment of Metals

基　　金：广东省自然科学基金(2016A030313450)。

摘　　要：对调质后的H13钢进行镀铬+540℃气体渗氮处理,获得氮化铬表层,然后将其进行耐磨试验,并与同温度经常规气体渗氮及离子渗氮后的H13钢试样进行组织及耐磨性对比。结果表明:3种工艺处理后试样的主要磨损机制为粘着磨损和磨粒磨损,镀铬/渗氮试样表面摩擦因数最低,为0. 44,耐磨性最好,但镀铬+渗氮层与基体的结合力最差。The chromium nitride was obtained on the quenched and tempered H13 steel substrate by using chromium plating and gas nitriding at 540 ℃ . Then the abrasion resistance test was performed and the microstructure and wear resistance of H13 steel specimens after conventional gas nitriding and ion nitriding at the same temperature were compared. The results show that the main wear mechanisms of the specimens after three different heat treatment are adhesion wear and abrasive wear. The chromium plated and gas nitrided specimens show the lowest average friction coefficient,0. 44,and the wear resistance is the best,but the adhesion between the Cr-plated + gas nitriding layer and the substrate is the worst.

关 键 词：H13钢 渗氮 氮化铬 耐磨性 

分 类 号：TG174.444[金属学及工艺—金属表面处理]