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利用氩弧熔覆技术在TC4合金表面制备出TiC增强的Ti基复合涂层。利用SEM、XRD和EDS分析了熔覆涂层的显微组织;利用显微硬度仪测试了复合涂层的显微硬度;利用摩擦磨损试验机测试了涂层在室温干滑动磨损条件下的耐磨性能。结果表明:氩弧熔覆涂层组织均匀致密,熔覆层与基体呈冶金结合,涂层中有大量的TiC树枝晶和条块状TiC颗粒;复合涂层明显改善了TC4合金的表面硬度,HV平均硬度可达9GPa;复合涂层室温干滑动磨损机制为磨粒磨损和轻微粘着磨损。
The TiC-reinforced Ti-based composite coatings were prepared on the surface of TC4 alloy by argon arc cladding. The microstructure of the coating was analyzed by SEM, XRD and EDS. The microhardness of the composite coating was measured by microhardness tester. The wear resistance of the coating was tested by sliding wear tester at room temperature Grinding performance. The results show that the microstructure of the TIG coating is uniform and compact, the cladding layer is metallurgically bonded with the substrate, and a large amount of TiC dendrites and massive TiC particles are present in the coating. The composite coating obviously improves the surface hardness of the TC4 alloy, HV average hardness of up to 9GPa; composite coating room temperature dry sliding wear mechanism for abrasive wear and slight adhesive wear.