目的 研究微织构纳米固体润滑剂及碳纳米管(CNTs)添加剂对微织构表面高温润滑性能的影响.方法 采用YLP-HP-1-100-100-100型光纤激光器在Cr4M04V高温轴承钢表面进行织构化处理,并填充二硫化钼(MoS2)-聚酰亚胺(PI)和不同碳纳米管添加含量的MoS2-PI-CNTs复合固体润滑剂.在环-盘接触的MMU-10G高温摩擦磨损试验机上进行了环境温度从室温到400℃的滑动摩擦性能试验.结果 填充含纳米MoS2的复合固体润滑剂的微织构表面的摩擦系数比填充含相同含量微米MoS2的低35％左右.微织构纳米MoS2-PI自润滑表面摩擦系数随碳纳米管含量的增加先减小后增大,当碳纳米管质量分数为6％时,其摩擦系数最小,且比无碳纳米管的低37％左右.在MoS2-PI纳米复合润滑剂中添加6％碳纳米管后,MoS2-PI-CNTs纳米复合润滑剂具有更高的使用温度和更低的摩擦系数.结论 纳米MoS2的润滑效果优于微米MoS2,碳纳米管有利于提高MoS2-PI复合固体润滑剂的耐热性能和润滑减摩性能.
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