摘要
利用摩擦磨损实验、XRD检测和微观组织分析研究了不同热处理工艺以及不同钨含量对高铬铸铁耐磨性能的影响。结果表明,钨在高铬铸铁中会形成碳化物,同时还能起到细化M7C3碳化物的作用,有利于高铬铸铁硬度和耐磨性能的提高。过量的钨会提高奥氏体向马氏体转变的起始温度,使基体中残余奥氏体量升高,造成高铬铸铁耐磨性下降。钨含量为0.8%,经(1020℃×2 h,淬火,250℃×4 h,回火)热处理后,高铬铸铁具有最佳的耐磨性能,硬度达到61.4 HRC。
The effects of different heat treatment processes and different tungsten content on the wear resistance of high chromium cast iron were studied by friction and wear test,XRD test and microstructure analysis.The results show that carbides can be formed in high chromium cast iron,and at the same time,it can refine M7C3 carbides,which is beneficial to improve hardness and wear resistance of high chromium cast iron.However,excessive tungsten will increase the initial temperature of austenite to martensite transformation,increase the residual austenite mass in the matrix,and cause the wear resistance of high chromium cast iron to decrease.The tungsten content is 0.8%,after heat treatment(1020℃×2 h,quenching,250℃×4 h,tempering),the high chromium cast iron has the best wear resistance and the hardness reaches 61.4 HRC.
作者
刘夙伟
季峰
张艳
郭宇航
LIU Suwei;JI Feng;ZHANG Yan;GUO Yuhang(Department of Mechanical and Electrical Engineering,Jiangyin Polytechnic College,Jiangyin 214405,China;School of Materials Science and Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China)
出处
《铸造技术》
CAS
2020年第12期1126-1130,共5页
Foundry Technology
关键词
高铬铸铁
碳化物
耐磨性
热处理
钨
high chromium cast iron
carbide
wear resistance
heat treatment
tungsten
