含MoS2的超音速喷涂WC-10Co-4Cr复合涂层摩擦性能研究

利用超音速火焰喷涂方法,以WC-10Co-4Cr为基体,添加MoS2以制备WC- 10Co-4Cr/MoS2自润滑复合涂层；对比分析了添加不同含量MoS2涂层的微观组织结构和物相；重点进行了摩擦磨损试验,研究润滑相MoS2对超音速喷涂WC涂层摩擦学特性的影响机理.研究结果表明:引入的MoS2一少部分转化成新态,其余则进入WC涂层空隙中,在摩擦过程中形成润滑膜起到润滑作用,并有效地降低了摩擦因数,使摩擦磨损过程中温升降低,有效减少热损伤,提高了涂层的耐磨性能；WC-10Co-4Cr/MoS2复合涂层具有很好的自润滑性,w(MoS2)15％时WC-10Co-4Cr/MoS2复合涂层的摩擦磨损性能最佳.

Study on friction performance of WC-10Co-4Cr composite coating containing MoS2 by HVOF

By adding MoS 2 in WC-10Co-4Cr matrix,the WC-10Co-4Cr/MoS 2 matrix self-lubricating composite coating were prepared by HVOF.The microstructure and phase with different content of MoS 2 coating comparatively was analysized.Focus on the friction and wear experiments to discuss the impact mechanism of lubrication phase of MoS 2 on the tribological properties of HVOF WC coating.Experimental results showed that a small part of MoS 2 introduced turn into a new state,while the rest enter the WC coating gap forming a lubricating film to play the lubricating role in the friction process.It effectively reduced the friction coefficient and the temperature rise in the process of friction and wear,and effectively reduced the thermal damage to improve the wear resistance of the coating.WC-10Co-4Cr/MoS 2 composite coating had a good self-lubrication.WC-10Co-4Cr/MoS 2 composite coating friction and wear properties would be the best when MoS 2 content was 15%.