摘要：
采用电弧离子镀技术在AISI304不锈钢表面制备TiAlN和TiAlSiN涂层.以Al2O3球为对摩材料,使用球-盘式摩擦磨损试验机测试涂层在室温(RT)、300°C、600°C恒温和RT～600°C、600→300°C变温环境中的摩擦学性能.通过扫描电子显微镜(SEM)、X射线衍射仪(XRD)、显微硬度计研究涂层的表面形貌、微观结构、硬度和摩擦学性能.结果表明:TiAlN和TiAlSiN涂层的主要结构为面心立方TiAlN相,硬度值分别为1 631 HV0.05和2 044 HV0.05.在300°C恒温和RT～600°C升温环境中,涂层磨损剧烈,均被磨穿,磨损机理以粘着磨损和疲劳断裂为主.600°C条件下,TiAlN涂层发生了以“点蚀”为主的氧化磨损,氧化产物起到了很好的润滑作用,摩擦因数为0.5.Si元素的加入使涂层的抗氧化性增强,在600°C和600→300°C的环境中,磨痕表面生成具有保护作用的氧化膜,涂层的耐磨性提高.%TiAlN and TiAlSiN coatings were deposited on the AISI304 stainless steel by arc ion plating.The tribological properties of coatings were investigated by ball-on-disc tribometer against Al2O3 balls at RT,300 °C,600 °C,RT-600 °C and 600→300 °C.The surface and cross section morphology,microstructure,hardness and tribological properties of the coatings were investigated by scanning electron microscope (SEM),X-ray diffraction (XRD),micro-hardness tester.The results show that the TiAlN and TiAlSiN coatings were mainly consisted of TiAlN phases.Their hardness were 1 631 HV0.05 and 2 044 HV0.05,respectively.When at 300 °C and RT-600 °C,all coatings were worn out.The wear mechanisms are mainly adhesive wear and fatigue fracture.At 600 °C,the "pitting" on the suface of the wear track caused by oxidation is the mainly wear mechanism,and the oxides act as the lubrication,the friction coefficient is 0.5.The oxidation resistance of TiAlSiN coatings is improved with addition of Si.The wear resistance of coatings is improved due to that the protective oxidation layer generated on the surface of wear track at 600 °C and 600→300 °C.
