论文部分内容阅读
采用粉末冶金工艺,在Fe-Mo-石墨自润滑复合材料的基础上,制备了添加Ni、Cu两种元素的Fe-MoNi-Cu-石墨高温自润滑复合材料,并在栓-盘式高温摩擦试验机上考察了其在室温、320和450℃下的摩擦学性能;采用金相显微镜、XRD和SEM等表征方法,分析了材料金相组织、物相成分和摩擦表面形貌.结果表明:FeMo-石墨自润滑复合材料中添加Ni和Cu元素,可以强化基体,增强材料的力学性能,改善材料的摩擦学性能.在高温摩擦过程中,Fe-Mo-Ni-Cu-石墨高温自润滑复合材料摩擦表面生成的由石墨+Cu Fe5O8+Fe3O4+Fe2.6Ni0.4O4组成的复合润滑膜是导致其具有良好高温润滑性的主要原因.
Based on the Fe-Mo-graphite self-lubricating composite material, a Fe-MoNi-Cu-graphite high-temperature self-lubricating composite material with Ni and Cu additions was prepared by powder metallurgy process. The tribological properties at room temperature, 320 and 450 ℃ were investigated on the testing machine.The microstructure, phase composition and frictional surface morphology of the material were analyzed by metallographic microscope, XRD and SEM.The results showed that FeMo - Graphite self-lubricating composites adding Ni and Cu elements, can strengthen the matrix, enhance the mechanical properties of materials and improve the tribological properties of the material.In the process of high temperature friction, Fe-Mo-Ni-Cu-graphite high temperature self-lubricating composites Friction surface generated by graphite + Cu Fe5O8 + Fe3O4 + Fe2.6Ni0.4O4 composite lubricating film is the main reason leading to its good high temperature lubricity.