Effect of Chromium on Oxidation in Wear of Surface Nanocrystalline Martensite Steel
文献类型: 外文期刊
第一作者: Zhang, Hao
作者: Zhang, Hao;Tang, Youyun;Fu, Licai
作者机构:
关键词: Martensite steel;Nanocrystalline;Diffusion;Oxidation;Wear behavior
期刊名称:TRIBOLOGY LETTERS ( 影响因子:3.106; 五年影响因子:3.02 )
ISSN: 1023-8883
年卷期: 2016 年 61 卷 1 期
页码:
收录情况: SCI
摘要: The friction and wear behavior of surface nanocrystalline martensite steel has been investigated. The wear rate of nanocrystalline martensite ranges from 2 x 10(-5) to 4.5 x 10(-5) mm(3)/m at an applied load of 2-15 N. It is one order of magnitude lower than its ultrafine grain counterpart. The surface hardness of both nanocrystalline and ultrafine martensite steels is about 7.0 GPa. It is unexpected according to Archard's equation that the wear rate has an inversely linear relationship to hardness. The investigations indicate that the diffusion rate of Cr towards a worn surface dramatically increases as the average grain size of martensite steel decreases to 30 nm. This leads to the formation of Fe2O3, CrO3 and FeCr2O4 films on the worn surface and an improvement in the wear resistance of martensite steel.
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