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对TiAl合金进行离子渗碳处理以提高其耐磨性.利用摩擦磨损试验机对TiAl渗碳后的室温及600℃高温干摩擦磨损性能进行了研究,采用扫描电镜、能谱、辉光放电光谱仪、X射线衍射仪等手段观察分析了磨痕的形貌和成分以及渗碳层组织与相结构.研究表明,TiAl合金经离子渗碳处理后形成一定厚度的含硬质Ti2AlC的渗碳层,其室温摩擦系数和磨损量明显低于TiAl基材,表现出良好的减摩和耐磨性能,600℃高温摩擦系数与TiAl基材相当,但磨损量较低,耐磨性得到提高.
The TiAl alloy was treated by ion-carburizing to improve the wear resistance.The room-temperature and high-temperature dry friction and wear properties of TiAl after carburizing were studied by using a friction and wear tester. The microstructures of TiAl alloy were characterized by SEM, EDS, , X-ray diffraction (XRD) and other means were observed and analyzed the morphology and composition of the wear scar and carburized layer structure and phase structure.The results show that the TiAl alloy by ion carburizing treatment to form a thickness of hard Ti2AlC carburized layer, The room temperature coefficient of friction and wear were significantly lower than the TiAl substrate, showing good anti-friction and wear resistance, high temperature coefficient of 600 ℃ and TiAl substrate equivalent, but the wear is lower, wear resistance is improved.