ABSTRACT

The TaC/TiC/Stellite X-40 Co-based composite coatings with different contents were successfully cladded on a Cr-Zr-Cu alloy substrate. The microstructure, wear and corrosion resistance of the composite coatings were investigated by means of X-ray diffraction (XRD), optical microscope (OM), energy dispersive spectrometer (EDS), scanning electron microscope (SEM), sliding wear test, as well as corrosion test in 3.5% NaCl solution. The results showed that Ta and Ti atoms easily form Co3Ta and Co3Ti hard phases with Co to increasing the hardness of the coating. Compared with the substrate, the wear resistance, corrosion resistance and hardness of the composite coatings were significantly improved. The wear resistance of the 20 wt. % TaC and 10 wt. % TiC composite coatings were better than that of the substrate. When the TaC content was 20 wt. % and the TiC content was 15 wt. %, the coating with excellent corrosion resistance (-0.153V).

摘要

在Cr-Zr-Cu合金基体上成功包覆了不同含量的TaC/TiC/Stellite X-40 Co基复合涂层。采用X射线衍射仪(XRD)、光学显微镜(OM)、能谱仪(EDS)、扫描电镜(SEM)、滑动磨损试验等手段研究了复合涂层的显微组织、耐磨性和耐腐蚀性能。作为在 3.5% NaCl 溶液中的腐蚀试验。结果表明，Ta和Ti原子容易与Co形成Co3Ta和Co3Ti硬相，从而提高涂层的硬度。与基体相比，复合涂层的耐磨性、耐腐蚀性和硬度均有显着提高。20 wt的耐磨性。% TaC 和 10 wt. % TiC 复合涂层优于基体。当 TaC 含量为 20 wt. %，TiC 含量为 15 wt. %，涂层具有优良的耐腐蚀性（-0.153V）。