铝合金表面TiN涂层的干摩擦磨损性能研究

Study on wear properties of TiN coating on Al alloy surface by dry friction

采用多弧离子镀技术在铝合金表面沉积了Ti N薄膜。利用球盘摩擦磨损试验仪研究了载荷和转速对Ti N薄膜的摩擦磨损性能的影响。试验以Si3N4为对磨体,磨损半径为5mm,试验环境为室温。结果表明:存在一临界载荷,使得摩擦系数和磨损量产生突变;转速增加,摩擦因数基本不变,但磨合时间有所缩短。利用SEM观察磨痕形貌,对磨损机理进行了分析。随着载荷和转速的增加,Ti N薄膜的磨损机制从轻微粘着磨损逐步向磨粒磨损转变。

TiN thin films were deposited by multi are ion plating system on the surface of aluminum alloy. Dry friction and wear properties were investigated by ball - on disk tribology tester. Si3N4 was chosen as the counterpart,at room temperature and a sliding radius of 5mm. The results showed the friction coefficient and the wear volume mutated at critical load, the speed increased and the friction coefficient was essentially the same, but the running time had been shortened. The wear morphology was observed by using SEM and the wear mechanism was also discussed. With the increase of load and speed, the wear of TiN films gradually transformed from a mild adhesive wear to abrasive wear.