基于正交实验方法的蛇纹石润滑油添加剂摩擦学性能

Tribological properties of serpentinelubricant additives evaluated byorthogonal tests method

采用正交实验方法,利用往复式滑动磨损试验机研究油酸改性天然蛇纹石超细粉体作为500SN润滑油添加剂的减摩抗磨性能,分析载荷、往复频率、摩擦时间和蛇纹石添加量4个因素对蛇纹石添加剂性能的影响规律。结果表明:蛇纹石矿物粉体能够明显提高润滑油的摩擦学性能,各因素对其减摩性能影响的主次顺序依次为添加量、往复频率、载荷和摩擦时间,对应的最优摩擦学条件组合为100 N,5 Hz,180 min,0.5%(质量分数,下同);对抗磨性能影响的主次顺序依次为载荷、添加量、往复频率和摩擦时间,最优条件组合为100 N,50 Hz,180 min,0.3%。蛇纹石矿物在摩擦表面形成的由多种氧化物、石墨和有机化合物等组成的复合摩擦反应膜是改善摩擦和磨损的关键。

Tribological properties of oleic acid modified natural serpentine ultrafine mineral powders as lubricating oil additive were investigated by a reciprocating sliding wear tester.The effects of the four factors including load,reciprocating frequency,sliding time and concentration of serpentine on the properties of serpentine additive were analyzed.Results indicate that the anti-wear and friction-reducing properties of the base oil are significantly improved by the addition of the modified serpentine powders.The order that affects the friction-reducing performance of the serpentine additive is:concentration,reciprocating frequency,load,sliding time,and the optimal tribological conditions are 100 N,5 Hz,180 min,0.5%(mass fraction).While that affects the anti-wear property is:load,concentration,reciprocating frequency,sliding time,and the optimal conditions are 100 N,50 Hz,180 min,0.3%.Serpentine minerals forms a tribofilm consisting of various oxides,graphite and organic compounds on the friction surface,which is the key to improving anti-wear and friction-reducing properties.