【摘要】 采用等离子喷涂技术制备T800钴基合金涂层.使用多晶X射线衍射仪和扫描电子显微镜对涂层组织结构进行了研究,并通过显微硬度测试、常温磨损性能测试实验、400℃磨损性能测试实验评价了涂层的硬度和耐磨性能.实验表明,等离子喷涂T800钴基合金涂层致密且含有Laves强化相.28³2 kW喷涂功率范围内,涂层含有Co与Co₃Mo₂Si,而在超过32 kW喷涂功率下涂层开始出现另一种Laves相CoMoSi.所制备涂层的磨损机理为磨粒磨损和疲劳磨损.更多还原

【Abstract】 The T800 Co-based alloy coating was prepared by plasma spraying technique. The microstructure of the coating was analyzed by XRD and SEM. Hardness test, room temperature and 400 ℃ wear tests were taken to value the hardness, wear resistance. Plasma sprayed T800 Co-based alloy coating is dense and contains Laves strengthening phase.Under 28 ³2 kW three groups of spraying power, all three coatings contain Co and Co₃Mo₂ Si and under 32 kW the coating starts to appear another Laves phase CoMoSi. The main wearing mechanism of the coating is abrasive wear and fatigue wear.更多还原