Effect of MoS2 content on anti-friction and wear-resistance of nickel-based alloy cladding layer

Abstract

NiCrAl/20%WC/MoS2 composite coatings with different MoS2 additions were prepared on the surface of 45 steel by laser cladding technology. The effects of MoS2 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 MoS2 content, the microstructure is gradually refined; the hardness gradually increases; the friction coefficient first decreases and then increases, and when the MoS2 content is 5%, the friction coefficient is at least 0.55; the wear volume first decreases and then increases, and the MoS2 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 MoS2 is 5%.