Effect of Cr on Microstructure and Mechanical Properties of CADI Grinding Ball
Author of the article:ZHAO Yuelin;ZHANG Tianyi;GAO Bingchen;LI Zulai;FENG Haibin;SHAN Quan
Author's Workplace：Yunnan Kungang Wear Resistant Material Science Co.,Ltd.,Kunming 653400,China;School of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China
Key Words：CADI grinding ball complex phase organization work hardening impact toughness
Abstract：
In order to solve the problems of peel loss,breakage and wear resistance of the grinding ball containing carbide isothermal quenching nodular iron(CADI),the microstructure and properties of the grinding ball under different Cr element contents were analyzed,so that the comprehensive performance of the grinding ball containing CADI could be improved.The results show that the grinding ball is composed of bainite,martensite,carbide,residual austenite and graphite ball.With the increase of Cr content,the carbide content in CADI grinding ball increases,which increases the hardness of CADI grinding ball,but its toughness also deteriorates sharply.In addition,with Cr content of 0.82%,the hardness of CADI grinding ball before work hardening reach 54.2 HRC,and the impact toughness value decreased to 5.0 J/cm^2.
