铝合金表面真空电弧离子镀AlTiCrN涂层的耐磨性研究  

The Wear Resistance of AlTiCrN Coating on Aluminum Alloy by Vacuum Arc Ion Plating

作　　者：孙紫薇 敬正彪 冉龙姣 SUN Ziwei;JING Zhengbiao;RAN Longjiao(Institute of Intelligent Manufacturing and Automobile,Chengdu Vocational&Technical College of Industry,Chengdu 610218,China;School of Mechanical Engineering,Chengdu University,Chengdu 610106,China)

机构地区：[1]成都工业职业技术学院智能制造与汽车学院,成都610218 [2]成都大学机械工程学院,成都610106

出　　处：《真空科学与技术学报》2023年第7期640-646,共7页Chinese Journal of Vacuum Science and Technology

基　　金：四川省粉末冶金工程技术研究中心开放基金项目(SC-FMYJ2020-03)。

摘　　要：铝合金由于轻质、耐蚀等优点,在汽车零部件中的应用逐渐增多,但其质软、耐磨性差,表面需要强化处理。采用真空电弧离子镀方法在铝合金表面分别沉积AlTiCrN和TiN涂层,利用扫描电子显微镜、X射线衍射仪、纳米压痕法、Rockwell压痕法以及摩擦磨损试验对涂层的组织结构、力学性能、结合性能和耐磨性能进行分析。结果表明:铝合金表面沉积的AlTiCrN涂层表面平整,“液滴”少。AlTiCrN涂层呈现TiN相的物相结构,且涂层以(200)晶面择优取向。AlTiCrN涂层晶粒细小,硬度为33.7GPa,分别较铝合金基体和TiN涂层提高67倍和66.8%。AlTiCrN涂层与铝合金基体结合牢固,在摩擦磨损过程中AlTiCrN涂层具有防粘作用和降低摩擦系数的作用,涂层后的铝合金其表面耐磨性显著增强。Aluminum alloy has been widely used in automobile parts due to its light weight,corrosion resistance and other advantages,but it is soft and has poor wear resistance.So,its surface needs strengthening treatment.AlTiCrN and TiN coatings were deposited on the aluminum alloy by vacuum arc ion plating.The microstructure,mechanical properties,bonding property and wear resistance of the coatings were analyzed by scanning electron microscopy,X-ray diffraction,nano indentation,Rockwell indentation and friction and wear tests.The results show that the surface of AlTiCrN coating on the aluminum alloy substrate was flat with few"droplets".The AlTiCrN coating exhibited a TiN phase,which was preferentially oriented with the(200)crystal plane.The AlTiCrN coating had fine grains and possessed a hardness of 33.7 GPa,which was 67 times and 66.8%higher than that of aluminum alloy substrate and TiN coating,respectively.The AlTiCrN coating was firmly bonded to the aluminum alloy substrate.During the friction and wear process,the AlTiCrN coating exhibited functions of antisticking and reducing the friction coefficient.The wear resistance of the coated aluminum alloy was significantly enhanced.

关 键 词：铝合金 真空电弧离子镀 AlTiCrN涂层 耐磨性 

分 类 号：TH117.1[机械工程—机械设计及理论] TG174.4[金属学及工艺—金属表面处理]