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为了提高GCr15钢的耐磨性和承载能力,采用低温离子渗硫技术在GCr15钢的表面制备了FeS固体润滑薄膜,在球-盘摩擦磨损试验机上对比研究了在基础油及2种含硫极压抗磨添加剂(ZDDP和SO)润滑条件下GCr15钢渗硫前后的摩擦学性能.利用SEM观察了磨损表面的形貌,利用XPS分析了磨损表面边界润滑膜化合物的价态及元素随深度的变化.研究表明:在摩擦过程中,表面的硫化层会阻碍润滑油中的添加剂与基体之间的作用,当添加剂与基体直接接触时其作用才能发挥.只有当硫化层破坏程度较小时,与添加剂的复合作用效果才较为明显.含硫添加剂与基体之间的反应可以补充硫化层因磨损失去的FeS,体现了显著的复合润滑效果.其中,高活性的硫烯比需要温度催化的ZDDP对硫化层的补充作用更明显.
In order to improve the wear resistance and bearing capacity of GCr15 steel, the FeS solid lubricant film was prepared on the surface of GCr15 steel by low temperature ion sulfurization technique. The tribological properties of GCr15 steel before and after infiltration were studied by using ZDDP and SO. The morphology of the worn surface was observed by SEM and the valences of the lubricating film compounds on the worn surface boundary were analyzed by XPS. The results show that: in the process of friction, the surface of the sulfide layer will hinder the lubricant additives and the role of the matrix, when the additive is in direct contact with the substrate to play its role only when the sulfide layer less damage, and The effect of the additive is more obvious.Reaction between the sulfur-containing additive and the matrix can supplement the vulcanized layer due to loss of wear FeS, showing a significant composite lubrication effect.Among them, the high activity of the sulfur than the temperature-catalyzed ZDDP Vulcanization of the role of the more obvious.