文献类型：期刊文献

英文题名：Microstructure and Sliding Wear Resistance of Laser Cladded WC/Ni Composite Coatings with Different Contents of WC Particle

作者：Xu, J. S.[1];Zhang, X. C.[1];Xuan, F. Z.[1];Wang, Z. D.[1];Tu, S. T.[1]

机构：[1]E China Univ Sci & Technol, Minist Educ, Lab Pressurized Syst & Safety, Shanghai 200237, Peoples R China

年份：2012

卷号：21

期号：9

起止页码：1904

外文期刊名：JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE

收录：;EI(收录号：20124815714525);WOS:【SCI-EXPANDED(收录号:WOS:000308185800011)】；

基金：The authors are grateful for the support by National Natural Science Foundations of China (50835003, 50805047, 51175177) and National High-tech R&D Program of China (863 Program, 2009AA04Z421). The author X.C. Zhang is also grateful for the support by Ph.D. Programs Foundation of Ministry of Education of China (20090101120021).

语种：英文

外文关键词：coatings; metal matrix composites; wear

摘要：The aim of this article was to address the effect of WC content on the microstructure, microhardness, and sliding wear resistance of laser cladded WC/Ni composite coatings. The content of WC particle in the feed powder varied in the range of 0-80 wt.%. Experimental results showed that the laser cladded coatings exhibited homogeneous microstructure without pores or cracks. By comparing with the 45# steel substrate, the microhardness of WC/Ni composite coatings was relatively high. The microhardness of coating increased with increasing the content of WC particles. The wear resistance of WC/Ni composite coatings was strongly dependent on the content of WC particle and their microstructure. When the WC content was lower than 40 wt.% in the feed powder, the wear rate of the coatings decreased with increasing WC content. The two-body abrasive wear was identified as the main wear mechanisms. For the coatings with WC content higher than 40 wt.% in the feed powder, their wear rate increased with increasing WC content. The three-body abrasive wear and fatigue wear were the main failures. The coating with 40 wt.% WC in the feed powder exhibited the best wear resistance.