铝合金表面添加La_2O_3激光熔覆Ni基WC金属陶瓷涂层研究  

STUDY ON Ni- BASED WC CERAMIC COATING ADDING BY LASER ADDING La_2O_3 ON THE ALUMINUM ALLOY

作　　者：钱书琨 蒋冬青 汪新衡[2] 朱航生 

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

出　　处：《机械强度》2014年第5期694-698,共5页Journal of Mechanical Strength

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(13JJ9025);湖南省教育厅科研项目(12C1082);衡阳市科技计划项目(2012KJ32)~~

摘　　要：添加适量La2O3,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和能谱分析、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,在铝合金表面激光熔覆处理时添加适量La2O3获得的Ni基WC金属陶瓷增强涂层无裂纹,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 La2O3 and their preparation cladding material, Ni-based WC ceramic coating were prepared by laser cladding on the surface of the aluminum alloy ZL108. Analyzing the microstructure and EDS, measuring the micro-hardness, checking the dry friction and wear properties of the cladding. The results show that the microstructure of Nibased WC metal-ceramics coating layer on the aluminum by adding appropriate amount of La2O3 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 mode under room temperature, dry friction and wear properties of Ni-based WC ceramic coating on the aluminum are excellent.

关 键 词：激光熔覆 铝合金La2O3 Ni基WC金属陶瓷涂层 摩擦磨损性能 

分 类 号：TG156.99[金属学及工艺—热处理]