固-液复合润滑对轴承钢摩擦学性能的影响  

The Effect of Solid-Liquid Composite Lubrication on the Tribological Properties of Bearing Steel

作　　者：刘沅东[1] 王成彪[1] 袁静静[2] 刘家浚[3] 

机构地区：[1]中国地质大学工程技术学院,北京100083 [2]中国矿业大学材料系,北京100083 [3]清华大学机械工程系,北京100084

出　　处：《摩擦学学报》2009年第6期537-545,共9页Tribology

摘　　要：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.Low temperature ion sulfuration was used to treat 52100 steel in order to improve its wear-resistance and anti-scuffing property. Two different sulfur-containing extreme pressure and anti wear additives were used to examine their synergistic effects with FeS layer. The tribological properties were investigated on a ball-on-disk sliding friction and wear tester. SEM was employed to analyze the morphologies of worn surface,and XPS was adopted to identify the valence state of typical elements of boundary lubricating film and detect the depth profile of elements. The results showed that sulfide layer on the surface prevented the additive and the substrate from direct contact and inhibited the effect of additive. The solid-liquid composite lubrication possessed an obvious synergistic effect when the duration of FeS layer was long. The sulfur-containing additives reacted with substrate to form FeS to supplement the loss of sulfide layer in wearing process. This incarnated the beneficial synergistic effect of composite lubrication. Sulfuration olefin （SO） with high activity had better replenishing effect than that of zinc dialkyl dithiophosphate（ZDDP） whose activity depended on catalysis of temperature.

关 键 词：低温离子渗硫 摩擦磨损 润滑油添加剂 

分 类 号：TG156.8[金属学及工艺—热处理]