TC4钛合金表面激光熔覆Ti-Mo-Al-B复合涂层的组织及摩擦磨损性能

doi:10.11896/cldb.22080075

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Abstract In order to improve the wear properties of TC4 alloy, A Ti-Mo-Al-B composite coating was prepared on the surface of TC4 alloy using laser cladding technology. The phase composition and microstructure of the coating were studied and analyzed, the synthesis mechanism of the composite coating was revealed, and the hardness distribution of the coating was analyzed combined with its structural characteristics. In addition, the friction and wear properties of the coating under different loads were also studied and analyzed. The results show that a good metallurgical bond is formed between the composite coating and the matrix. The composite coating is mainly composed of BCC solid solution matrix phase, short rod and granular TiB reinforcing phase, and a small amount of α-Ti phase composition. The average hardness of the coating is 648.69HV, which is 1.97 times higher than that of the matrix TC4 alloy (330HV). The abrasive surface of the coating is flat with a few furrows. When the load is 30 N, the wear amount is reduced by 11% compared with TC4 matrix, and its wear mechanism is abrasive wear.

Key words： laser cladding composite coating microstructure synthesis mechanism TC4 friction and wear

Published: 25 June 2024 Online: 2024-07-17

CLC number:	TG174.4
	TG665

Fund:National Natural Science Foundation of China (52065009), the Science and Technology Planning Project of Guizhou Province, China (ZK [2021] 269), and the Science and Technology Planning Project of Guiyang, China ([2021]1-4).

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	XIAO Huaqiang
	YIN Xinggui
	FENG Jinyu
	XIAO Yi
	GONG Yuting

Cite this article:

XIAO Huaqiang,YIN Xinggui,FENG Jinyu, et al. Microstructure and Wear Properties of Laser Cladded Ti-Mo-Al-B Composite Coating on TC4 Surface[J]. Materials Reports, 2024, 38(12): 22080075-6.

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http://www.mater-rep.com/EN/10.11896/cldb.22080075 OR http://www.mater-rep.com/EN/Y2024/V38/I12/22080075

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