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为制备在润滑油中具有良好分散性的自修复粉体和研究不同载荷对自修复膜成膜的影响,分析了钛酸酯偶联剂对蛇纹石粉体表面的修饰作用,探讨了不同载荷下添加剂对金属摩擦副的自修复作用,解析了试样表面形貌和试样表面化学成分.结果表明:经钛酸酯偶联剂修饰的粉体在润滑油中具有较好的分散性;在润滑油中加入蛇纹石粉体和分散剂可显著增加耐磨减摩性能.当载荷为300 N,含有添加剂的润滑油润滑条件下,摩擦副的摩擦系数较纯基础油低,添加剂起减摩作用;当载荷为600 N和900 N时,蛇纹石粉体在表面形成相对完整、光滑的自修复膜层,避免了金属表面的直接接触,从而起到降低磨损的作用;当载荷为900 N时,表面自修复膜层在摩擦机械力和热的作用下,发生化学脱水反应,自修复膜层表面有较多的微小孔洞.
In order to prepare the self-healing powder with good dispersibility in lubricating oil and study the influence of different loadings on the film formation of self-healing film, the modification effect of titanate coupling agent on the surface of serpentine powder was analyzed. The self-repairing effect of additive on metal friction pair under load was analyzed and the surface morphology and the chemical composition of the sample surface were analyzed.The results showed that the powder modified by titanate coupling agent has good dispersibility in lubricating oil ; Adding serpentine powder and dispersant to the lubricating oil can significantly increase the anti-friction and anti-friction properties.When the load is 300 N, the friction coefficient of the friction pair is lower than that of pure base oil under the lubricant containing additives, The serpentine powder forms a relatively complete and smooth self-repairing film on the surface when the load is 600 N and 900 N. It avoids the direct contact of the metal surface and thus reduces the wear. When When the load is 900 N, the surface self-repairing film layer undergoes chemical dehydration reaction under the action of frictional mechanical force and heat, and there are many tiny holes on the surface of the self-repairing film layer.