Microstructure and properties of WC reinforced Ni-based composite coatings with Y2O3 addition on titanium alloy by laser cladding

被引：65
作者：
Wang, Kaiming [1 ]
Du, Dong [1 ]
Liu, Guan [1 ]
Chang, Baohua [1 ]
Hong, Yuxiang [1 ]
机构：
[1] Tsinghua Univ, Dept Mech Engn, State Key Lab Tribol, 1 Qing Hua Yuan, Beijing 100084, Peoples R China
来源：
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING | 2019年 / 24卷 / 05期
关键词：
Laser cladding; microstructure; Ni-based composite coatings; WC; Y2O3; titanium alloy; TI-6AL-4V ALLOY; WEAR; RESISTANCE; HARDNESS;
D O I：
10.1080/13621718.2019.1580441
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this study, WC reinforced Ni-based composite coatings with Y2O3 addition were deposited on Ti-6Al-4V titanium substrate by laser cladding. The phases, microstructure, microhardness and wear resistance of the composite coatings were studied by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, microhardness tester and wear tester. The results showed that good metallurgical bonding was achieved between the composite coatings and substrate. The phases mainly were -Ni, TiC, TiB2, Ni3B, M23C6 and WC. Most of the WC was dissolved in small pieces of WC during the laser cladding process. The microhardness of the composite coatings was about 3 times that of the titanium substrate and the wear resistance of the composite coatings had a significant increase.
引用
收藏
页码：517 / 524
页数：8
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