铝合金表面添加稀土激光熔覆Ni基WC金属陶瓷涂层研究

Study on Ni-based WC Ceramic Coating Adding Laser Cladding Rare Earth on Al Alloy Surface

添加适量稀土氧化物,采用自配的熔覆材料在ZL108表面激光熔覆制备了Ni基WC金属陶瓷复合涂层,对熔覆层进行了显微组织分析、显微硬度测量以及室温下的干滑动摩擦磨损试验。结果表明,铝合金上激光熔覆Ni基WC金属陶瓷增强熔覆层无裂纹,组织细小、致密,WC颗粒增强相与基体之间结合良好。室温下熔覆层的磨损主要为显微切削和粘着磨损,干摩擦磨损性能优良。

Adding appropriate amount of rare earth oxides and their preparation cladding materials, Ni-based WC ceramic coating was prepared by laser cladding on the surface of the aluminum alloy ZL108. Microstructure was analyzed, micro-hardness was measured, dry friction and wear properties of the cladding were checked. The results show that the microstructure of Ni-based WC metal-ceramics coating layer on the aluminum alloy is fine and compact and no cracks, Metallurgical bonding is firmly between WC particles and the matrix. Micro cutting and adhesive wear are the main wear modes at room temperature. Dry friction and wear ofNi-based WC ceramic coating on the aluminum alloy are excellent.