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

作　　者：汪新衡 钱书琨 刘安民[2] 张蓉[2] 朱航生 

机构地区：[1]湖南科技经贸职业学院,湖南衡阳421001 [2]湖南工学院先进制造技术研究所,湖南衡阳421002 [3]衡阳风顺车桥有限公司产品部,湖南衡阳421001

出　　处：《热加工工艺》2014年第4期126-129,共4页Hot Working Technology

基　　金：湖南省自然科学基金委员会与衡阳市人民政府自然科学联合基金资助项目(13JJ9025);衡阳市科技计划项目(2012KJ32);湖南工学院重点科研项目(HGZ0601)

摘　　要：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.

关 键 词：激光熔覆 铝合金 稀土氧化物 Ni基WC金属陶瓷涂层 显微组织 干摩擦磨损 

分 类 号：TG156.99[金属学及工艺—热处理]