Microstructures and Wear Resistance Properties of Ni-Ti-Si Coatings on Copper Alloy Surface by Laser Cladding

被引：0
|
作者：
Zhuang Q. [1 ,2 ]
Zhang P. [1 ,2 ]
Li M. [1 ,2 ]
Yan H. [1 ,2 ]
Yu Z. [1 ,2 ]
机构：
[1] School of Materials Engineering, Shanghai University of Engineering Science, Shanghai
[2] Shanghai Research & Development Center for Key Technologies of Intelligent Ultra-Intense Laser Processing Equipments, Shanghai University of Engineering Science, Shanghai
来源：
Zhang, Peilei (peilei@sues.edu.cn) | 1600年 / Science Press卷 / 44期
关键词：
Copper alloy; Laser cladding; Laser technique; Ni-Ti-Si coatings; Wear resistance;
D O I：
10.3788/CJL201744.1102002
中图分类号：
学科分类号：
摘要：
Two kinds of Ni-Ti-Si composite coatings are prepared on copper alloy surfaces by the laser cladding technique. The compositions, microstructures, friction and wear properties of these coatings are measured and analyzed. The results show that the Ni-15Ti-15Si coating (coating 1) microstructure is mainly composed of the dendritic TiSi, TiSi/TiNi3 eutectic structure and the γ-Ni phase, however the Ni-35Ti-15Si coating (coating 2) is mainly composed of the black dendritic Ti2Ni3Si strengthening phase and the white band shaped Ti2Ni phase. The average microhardness of coating 2 is 1.3 times of that of coating 1 and is about 9.5 times of that of copper alloy. The coating 2 at a room temperature possesses the outstanding wear resistance with an average friction coefficient of 0.54, 35% smaller than that of the copper substrate. © 2017, Chinese Lasers Press. All right reserved.
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