采用连续波 2 k W YAG激光器在 6 0 6 1铝合金表面激光熔覆 Ni Cr BSi合金。利用扫描电子显微镜 (SEM/EDX)、X射线衍射仪等分析检测设备研究熔覆层的组织形貌、化学成分及相组成。利用超声波感应空泡腐蚀设备对熔覆层在 3.5 % Na Cl水...采用连续波 2 k W YAG激光器在 6 0 6 1铝合金表面激光熔覆 Ni Cr BSi合金。利用扫描电子显微镜 (SEM/EDX)、X射线衍射仪等分析检测设备研究熔覆层的组织形貌、化学成分及相组成。利用超声波感应空泡腐蚀设备对熔覆层在 3.5 % Na Cl水溶液中的空泡腐蚀性能进行了系统评价 。展开更多
The NiCrBSi-Y2O3 composite coatings were prepared on the surface of 45 carbon steel by plasma spray, the microstructure and tribological properties of the coatings were investigated. The results show that the NiCrBSi-...The NiCrBSi-Y2O3 composite coatings were prepared on the surface of 45 carbon steel by plasma spray, the microstructure and tribological properties of the coatings were investigated. The results show that the NiCrBSi-Y2O3 composite coatings are mainly composed of γ-Ni, CrB, Cr7C3 and Y2O3. With addition of Y2O3, hard phases such as CrB, Cr7C3 emerge in composite coating, and the density of the composite coatings also increases. The NiCrBSi-0.5Y2O3 composite coating presents excellent tribological properties. Its friction coefficient is 0.175, which is about 37% of that of the pure NiCrBSi coating. The mass wear loss is 1.2 mg, which is reduced by 43% compared with the pure NiCrBSi coating. When the loads are 6-10 N, the NiCrBSi-0.5Y2O3 composite coating suffers from slight wear and the wear mechanisms are mainly adhesive wear accompany with slight micro-cutting wear and micro-fracture wear. As the load increases to 12 N, the wear mechanisms are adhesive wear and severe micro-cutting wear.展开更多
文摘采用连续波 2 k W YAG激光器在 6 0 6 1铝合金表面激光熔覆 Ni Cr BSi合金。利用扫描电子显微镜 (SEM/EDX)、X射线衍射仪等分析检测设备研究熔覆层的组织形貌、化学成分及相组成。利用超声波感应空泡腐蚀设备对熔覆层在 3.5 % Na Cl水溶液中的空泡腐蚀性能进行了系统评价 。
文摘The NiCrBSi-Y2O3 composite coatings were prepared on the surface of 45 carbon steel by plasma spray, the microstructure and tribological properties of the coatings were investigated. The results show that the NiCrBSi-Y2O3 composite coatings are mainly composed of γ-Ni, CrB, Cr7C3 and Y2O3. With addition of Y2O3, hard phases such as CrB, Cr7C3 emerge in composite coating, and the density of the composite coatings also increases. The NiCrBSi-0.5Y2O3 composite coating presents excellent tribological properties. Its friction coefficient is 0.175, which is about 37% of that of the pure NiCrBSi coating. The mass wear loss is 1.2 mg, which is reduced by 43% compared with the pure NiCrBSi coating. When the loads are 6-10 N, the NiCrBSi-0.5Y2O3 composite coating suffers from slight wear and the wear mechanisms are mainly adhesive wear accompany with slight micro-cutting wear and micro-fracture wear. As the load increases to 12 N, the wear mechanisms are adhesive wear and severe micro-cutting wear.
