Abstract：The wear resistance of sintered, cast hypereutectic high chromium cast iron and TM52 steel bonded carbide under different impact energy conditions were compared. The development of the wear surface and the micro-crack of the sub-surface were analyzed by scanning electron microscopy (SEM). The wear mechanism was also discussed. The results show that the high chromium cast iron prepared by liquid phase sintering has excellent impact abrasive wear resistance. Under the medium and low impact energy conditions, the wear resistance of sintered high chromium cast iron is significantly better than that of TM52 (4 to 10 times).Under the medium and high impact work conditions, the wear resistance increases more than 10 times compared to that of casting high chromium cast iron. The wear mechanism of sintered high chromium cast iron is mainly micro-cutting, as well as fatigue wear and brittle fragmentation under the high-energy impact work. The short rod-like M7C3-type carbides in sintered high chromium cast iron yield small split and stress concentration on metal matrix, while the martensite-based matrix with high strength and toughness, can effectively support and maintain a uniform dispersion of carbides and block micro-cracks initiation and expansion.
卢瑞青, 肖平安, 宋建勇, 顾景洪, 张婷, 李小英. 新型烧结高铬铸铁的冲击磨粒磨损性能[J]. 粉末冶金材料科学与工程, 2018, 23(1): 70-77.
LU Ruiqing, XIAO Ping’an, SONG Jianyong, GU Jinghong, ZHANG Ting, LI Xiaoying. Impact abrasive wear resistance of a new type of sintered high chromium cast iron. Materials Science and Engineering of Powder Metallurgy, 2018, 23(1): 70-77.
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2018, Vol. 23 
