论文部分内容阅读
改进的ASTM G65橡胶轮测试方法可采用220nm二氧化钛颗粒和368μm的砂粒分别在潮湿和干燥条件下使用。在由碳化物粒径不同(传统和亚微米)的两种粉末所制备的WC-CoCr涂层上开展试验,研究碳化物大小和磨损介质特性对涂层磨损性能的影响。采用扫描电镜对同一位置磨损前后的低倍和高倍形貌进行观察,并分析了涂层的磨损机理。结果表明:磨损机理取决于碳化物和磨粒的相对大小。在样品上进行磨损定量分析,通过调整碳化物尺寸可改善磨损性能,测试涂层的一些力学性能用于对比。
Improved ASTM G65 rubber wheel test method can be used 220nm titanium dioxide particles and 368μm sand were used under wet and dry conditions. Experiments were conducted on WC-CoCr coatings prepared from two powders of different carbide particle sizes (conventional and submicron) to investigate the effect of carbide size and wear media properties on the wear properties of the coatings. Scanning electron microscopy (SEM) was used to observe the low magnification and the high magnification before and after wearing the same place. The wear mechanism of the coating was also analyzed. The results show that the wear mechanism depends on the relative sizes of carbides and abrasive particles. Quantitative analysis of wear on the samples, wear properties can be improved by adjusting the carbide size, and some of the mechanical properties of the tested coatings are used for comparison.