研究了等离子喷涂WC/ 18Co涂层的微动磨损机理。结果表明 ,涂层的微动磨损开始阶段以粘着磨损为主 ,涂层硬度高 ,抗粘着能力强 ,磨损轻微 ;稳定阶段以疲劳脱层和脆性开裂剥落为主 ,涂层脆性大 ,喷涂粒子间结合强度低 ,容易磨损。喷涂层内部的氧化物夹杂是造成涂层抗微动磨损能力不足的主要原因 The fretting wear mechanism of plasma sprayed WC / 18Co coating was studied. The results show that the initial stage of fretting wear is mainly adhesive wear, the hardness of the coating is high, the anti-adhesion ability is slight and the wear is slight; in the stable stage, the fatigue delamination and brittle cracking are the main ones, the coating is brittle and the spraying particles Between the combination of low strength, easy to wear. Oxide inclusions inside the spray coating is the main reason for the insufficient anti-fretting wear of the coating