论文部分内容阅读
采用阳极氧化法在7475铝合金表面制备一层氧化膜,在摩擦磨损试验机上考察不同载荷情况下氧化膜摩擦磨损性能。利用XPS、扫描电镜、硬度计和X射线应力仪对膜层原子结合能谱、阳极氧化前后表面磨损形貌、表面硬度变化和表面残余应力变化进行了分析。结果表明,阳极氧化后表面较致密,氧化膜是以Al_2O_3形式存在,其界面为扩散型结合形式;阳极氧化后平均摩擦系数减小,摩擦性能得到提高;原始状态试样的磨损机理为粘着磨损,并伴随着磨粒磨损,而阳极氧化后试样的磨损机理为磨粒磨损;表面的高硬度是提高耐磨性能的主要因素。
Anodic oxidation method was used to prepare an oxide film on the surface of 7475 aluminum alloy. The friction and wear properties of the oxide film under different load conditions were investigated on a friction and wear tester. The XPS, scanning electron microscopy, hardness tester and X-ray stress meter were used to analyze the atomic energy spectra, surface wear morphology before and after anodization, surface hardness change and surface residual stress. The results show that the surface of the oxide film is dense and the oxide film is in the form of Al 2 O 3, the interface is diffusion type. The average friction coefficient decreases after anodization and the tribological properties are improved. The wear mechanism of the original sample is adhesive wear , And accompanied by abrasive wear, and the wear mechanism of the anodized sample is abrasive wear; the surface of the high hardness is to improve the wear resistance of the main factors.