硫-磷型抗磨剂对齿轮油抗微点蚀性能的影响

采用MPR试验机，通过辊子轨道宽度变化率、辊子表面形貌和CLA曲线考察三烷基二硫代磷酸酯(P1)和三烷基苯基硫代磷酸(P2)对齿轮油抗微点蚀性能的影响。结果表明，MPR试验机对齿轮油的抗微点蚀性能具有较好的区分性，与含P1样品相比，含P2样品试验时的轨道宽度变化率小，辊子表面微点蚀凹坑数量较少且深度较浅，CLA曲线幅度较小而且平稳，说明P2具有更好的抗微点蚀性能，可以降低齿轮油微点蚀发生的概率。

INFLUENCE OF S-P TYPE ANTI-WEAR AGENTS ON ANTI-MICROPITTING

The effect of anti-wear agents of trialkyl phosphorodithioate (P1) and trialkylphenyl phosphorothionate (P2) on anti-micropitting for gear oil was tested by analysis of the change rate of track width, CLA curve and surface topography of the roller using MPR test machine. The result showed that the MPR test machine has a good distinction to the anti-micropitting for gear oil. Compared with sample P1, the change rate of the track width of P2 is small; fewer pits on the surface of roller are found and are relatively shallow; the CLA curve is relatively steady and smooth. These results showed that P2 has better anti-micropitting ability and could lower the occurrence of micropitting for gear oil.