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JMEPEG (2020) 29:8093–8106 https://doi.org/10.1007/s11665-020-05275-x

Effects of Ti Addition on Microstructure and Tribological Properties of In Situ Composite Carbide Coating WC-TiC/ FeNi Fabricated by Plasma Transferred Arc Metallurgical Reaction Youlu Yuan, Yunyang Li, Xiangman Zhou, Min You, Yi Zhang, and Zhuguo Li Submitted: 21 April 2020 / Revised: 3 October 2020 / Accepted: 10 October 2020 / Published online: 13 November 2020 The effects of Ti addition on the microstructure and tribological properties of in situ composite carbide WC-TiC/FeNi coating were studied using XRD, SEM, EDS, and friction and dry sliding wear tests. The results show that the composite carbide WC-TiC was successfully in situ synthesized in the coating, and with Ti addition increased by 0.1 from 0.1 to 0.4 wt.%, the in situ carbide TiC increased from 3.4 to 24.4 vol.%, while the carbide WC decreased from 32.5 to 24.2 vol.%, and the coating hardness increased from 1027 to 1196 HV4.9. The friction and dry sliding wear tests show that for WC-TiC/FeNi composite coating, the addition of Ti can not only reduce the friction coefficient, the mass loss of both the coatings and its counterpart but also improve the friction stability, service life, and wear rate (WR). The relationship between the Ti addition and the coating wear rate fits the exponential decay equation WR = 10.6 2 0.089  e (Ti/0.098). The main wear mechanisms of in situ WC-TiC/FeNi composite carbide coating are abrasive wear, oxidative wear, and micro-plow wear. Keywords

composites, in situ method, metal matrix, PTA metallurgical reaction, tribology property, WC-TiC/ FeNi coating

1. Introduction In recent years, the composite carbide WC-TiC has been widely found in the fields of the cutting tool, rock drill, and wear-resisting parts for its excellent properties of high hardness, medium toughness, high chemical stability, and high wear resistance (Ref 1-7). Using surface coating technology to

Youlu Yuan, Hubei Key Laboratory of Hydroelectric Machinery Design and Maintenance, College of Mechanical and Power Engineering, China Three Gorges University, Yichang 443002, PeopleÕs Republic of China; and Shanghai Key Laboratory of Materials Laser Processing and Modification, School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, PeopleÕs Republic of China; Yunyang Li, Xiangman Zhou, and Min You, Hubei Key Laboratory of Hydroelectric Machinery Design and Maintenance, College of Mechanical and Power Engineering, China Three Gorges University, Yichang 443002, PeopleÕs Republic of China; Yi Zhang, School of Mechanical Engineering, Changzhou University, Changzhou 213164, PeopleÕs Republic of China; and Zhuguo Li, Shanghai Key Laboratory of Materials Laser Processing and Modification, School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, PeopleÕs Republic of China. Contact e-mails: [email protected] and [email protected].

Journal of Materials Engineering and Performance

prepare carbides on a low-priced metallic surfa