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NiCrAl/20%WC/MoS 2  composite coatings with different MoS 2  additions were prepared on the surface of 45 steel by laser cladding technology. The effects of MoS 2  content on the microstructure, hardness and antifriction and wear resistance of the cladding layer were mainly studied. The results show that the content of lubricating phase has a certain influence on the hardness, anti-friction and wear resistance. With the increase of MoS 2  content, the microstructure is gradually refined; the hardness gradually increases; the friction coefficient first decreases and then increases, and when the MoS 2  content is 5%, the friction coefficient is at least 0.55; the wear volume first decreases and then increases, and the MoS 2  addition amount is 5% When the wear volume is the smallest, the wear resistance is increased by 79% compared with the 45 steel substrate. Comprehensive analysis shows that the optimum addition amount of MoS 2  is 5%.

Effect of MoS 2 content on anti-friction and wear-resistance of nickel-based alloy cladding layer