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.
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2024, Vol. 38 
