磷氮型极压抗磨添加剂对钢-铝摩擦副摩擦磨损性能的影响

Effect of P-N Type Extreme Pressure and Anti wear Additive on the Friction and Wear Behaviour of Aluminum steel Sliding Pair

采用 SRV摩擦磨损试验机评价了磷酸三甲酚酯 (TCP)、磷酸二丁酯 (DBP)、十二胺 (DA)和磷酸胺盐 (PAS)抗磨添加剂在液体石蜡中对钢 -铝摩擦副摩擦磨损性能的影响 .采用 X射线光电子能谱仪分析铝试块磨痕表面边界润滑膜中的 P和 N元素的化学状态 .结果表明 ,含 P抗磨添加剂可以有效提高铝合金的耐磨性 ,而其中以磷氮剂的效果最好 .其它含磷添加剂也可以有效地降低磨损 .XPS分析表明 ,在铝合金磨损表面形成了含磷酸铝的表面膜 。

The friction and wear properties of an Al2024 alloy against AISI52100 steel were evaluated on an Optimol SRV friction and wear tester. The friction and wear tests were carried out under the lubrication of liquid paraffin alone and liquid paraffin containing various extreme pressure and antiwear additives. The additives including tricresyl phosphate (TCP), dibutyl phosphite (DBP), dodecylamine (DA) and a phosphated amine salt (PAS) were used. The boundary film formed on the rubbed surface of Al2024 was analyzed with a scanning electron microscope (SEM) and X ray photoelectron spectroscope (XPS). As the results, P containing additives such as TCP and DBP in liquid paraffin significantly increase the anti wear ability and reduce the friction coefficient. PAS in liquid paraffin shows the best anti wear and friction reducing properties. The improvement in the antiwear and friction reduction behavior of the Al steel pair is attributed to the formation of the boundary film composed of aluminum phosphate and/or aluminum phosphite on the lubricated surfaces.