Research on Influence Mechanism of Tungsten on Wear Resistance of High Chromium Cast Iron
Author of the article:LIU Suwei;JI Feng;ZHANG Yan;GUO Yuhang
Author's Workplace：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
Key Words：high chromium cast iron carbide wear resistance heat treatment tungsten
Abstract：
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.
