新型烧结高铬铸铁的冲击磨粒磨损性能

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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.

Key words： high chromium cast iron sintering impact abrasive wear wear resistance

Received: 27 July 2017 Published: 11 July 2019

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	Articles by authors
	LU Ruiqing
	XIAO Ping’an
	SONG Jianyong
	GU Jinghong
	ZHANG Ting
	LI Xiaoying

Cite this article:

LU Ruiqing,XIAO Ping’an,SONG Jianyong, et al. Impact abrasive wear resistance of a new type of sintered high chromium cast iron[J]. Materials Science and Engineering of Powder Metallurgy, 2018, 23(1): 70-77.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2018/V23/I1/70

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