目的 通过氩弧熔覆技术在Ti6Al4V钛合金表面制备陶瓷颗粒增强Ni基复合涂层，以改善其摩擦磨损性能。方法 将Ti粉、BN粉和Ni60A粉进行球磨混合，运用氩弧熔覆技术在Ti6Al4V钛合金表面原位合成多相陶瓷颗粒增强镍基熔覆层。通过X射线衍射分析仪、能谱分析仪、扫描电子显微镜和透射电子显微镜，分析熔覆层中陶瓷颗粒相的组成、形貌、尺寸、分布以及结构特点。用维氏硬度计和环-块式摩擦磨损试验机测试了熔覆层的显微硬度和摩擦磨损性能，并通过扫描电子显微镜对磨痕形貌进行分析。结果 熔覆层物相主要包括TiN、TiNi、TiB、TiB2和α-Ti。原位合成的陶瓷颗粒相弥散分布于熔覆层中，其中增强相TiN、TiB和TiB2的形貌分别以颗粒状、针状和棒状形式存在。熔覆层表面硬度可达1210~1250HV0.5。在相同磨损条件下，TC4合金基体与熔覆层的磨损量分别为34.23 mg和4.86 mg，熔覆层的磨损量明显降低。熔覆层的磨损表面无粘着痕迹，磨损机制为磨粒磨损。结论 与Ti6Al4V钛合金基体对比，熔覆层显微硬度值提高约4倍，多相陶瓷颗粒熔覆层可有效提高钛合金表面的耐磨性。

The work aims to prepare ceramic particle reinforced Ni-based composite coating on the Ti6Al4V alloy surface by argon arc cladding technique to improve the friction and wear resistance of alloy. Ti, BN and Ni60A powders were mixed by milling and ceramic particle reinforced Ni-based composite coating was in situ fabricated on the Ti6Al4V alloy surface by argon arc cladding technique. The composition, morphology, size, distribution and structural characteristics of ceramic particles in cladding coating were analyzed by X-ray diffraction analyzer (XRD), Energy Dispersion Spectrum (EDS), Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM). Microhardness and wear resistance of the cladding coating were examined by Vickers hardness tester and ring-block friction and wear tester and the morphologies were studied by SEM. The main phases of cladding coating contained TiN, TiNi, TiB, TiB2 and α-Ti. The ceramic particle particles synthesized in situ were uniformly distributed in cladding coating. The morphologies of TiN, TiB and TiB2 were in the form of grain, needle and rod, respectively. The surface microhardness of cladding coating reached 1210~1250HV0.5. Under the same wear condition, the wear loss of TC4 alloy matrix and cladding coating was 34.23 mg and 4.86 mg, respectively, which was obviously reduced. There was no adhesive trace on the worn surface of the cladding coating, and the main wear mechanism of the cladding coating was abrasive wear. Compared with the Ti6Al4V alloy substrate, the microhardness of the cladding coating is improved by 4 times. The wear resistance of titanium alloy can be effectively improved by multi-phase ceramic particles.