目的 通过氩弧熔覆技术在TC4合金表面制备石墨烯增强钛基复合涂层，以改善其耐磨性能。方法 将钛粉和石墨烯在球磨机中充分混合。将混合后的粉末涂覆于TC4合金表面，采用氩弧熔覆技术将预涂覆粉末熔化，制备出陶瓷颗粒增强钛基熔覆层。采用X射线衍射分析仪分析涂层的物相，利用光学显微镜、扫描电子显微镜分析熔覆层中颗粒相的组成及分布。采用显微维氏硬度仪和摩擦磨损试验机，测试熔覆层的显微硬度和磨损性能。结果 熔覆层厚度可达1 mm，且表面及横截面没有气孔、裂纹等缺陷产生，物相主要包括TiC和α-Ti。熔覆层中不同区域的组织存在差别，涂层的中上部组织主要为树枝晶，底部组织中树枝晶逐渐减少。熔覆层与基体呈冶金结合，组织致密。增强相TiC以颗粒状和花瓣状形式存在。石墨烯增强钛基复合涂层的显微硬度高达845.4HV。在相同磨损条件下，TC4合金基体与熔覆层的磨损量分别是0.153 g和0.0123 g，熔覆层的磨损量明显降低。涂层的磨损机制主要是磨粒磨损。结论 与TC4合金基体对比，熔覆层的显微硬度提高约2.5倍，耐磨性提高12倍。氩弧熔覆原位自生TiC陶瓷颗粒增强钛基熔覆层可显著提高TC4合金表面的耐磨性。

The work aims to study the graphene reinforced titanium-based composite coating is prepared on the surface of TC4 alloy by argon arc cladding technology to improve its wear resistance. In this work, the Graphene power and Ti powder are ball-milled and mixed. The mixed powder was coated on the surface of TC4 alloy, and the ceramic particle-reinforced titanium-based cladding coating is prepared by alloy melting the precoated powder by argon arc cladding technology. The phase of the cladding coating was analyzed by X-ray diffraction analyzer. The composition and distribution of ceramic particles in cladding coating was analyzed by optical microscope and scanning electron microscope and optical microscope. Microhardness and wear properties of the cladding coating was measured by vickers hardness tester and universal friction and wear tester. The thickness of cladding coating of this paper is 1.0 mm, without obvious defects like pores, cracks on the surface and cross section.The phases of the cladding coating mainly include α-Ti and TiC. However, the results show that the microstructure of different areas in the coating is different. The dendrite structure is mainly distributed in the middle and upper part of the coating, while the dendrites in the bottom part decrease gradually. The cladding coating and the substrate are metallurgically bonded, and the structure is dense. The enhanced phase is granular and petal. The microhardness of the coating is as high as 845.4HV, the wear loss of, the pure copper matrix and the cladding layer is 0.153 g and 0.0123 g under the same wear conditions, respectively. and the wear amount of the cladding layer is significantly reduced; there is no adhesion mark on the wear of the cladding coating, and the wear mechanism is abrasive wear. Compared with the pure copper matrix, the microhardness of the cladding layer is increased by about 2.5 times, and the wear resistance increased by 12 times. The TiC ceramic particle cladding coating can significantly improve the wear resistance of theTC4 alloy surface.