摘要
采用CO2横流激光器在21-4-N耐热钢表面熔覆添加0.5%CeO2的不同成分Ni基WC金属陶瓷复合层;对熔覆层进行了显微组织观察、显微硬度测量以及不同温度下的高温干摩擦磨损试验。结果表明,Ni21+25%WC+0.5%CeO2熔覆层组织均匀细小,高温下以粘着磨损和氧化磨损为主,干摩擦磨损性能优良。
The Ni-based WC metal-ceramic coating with different Ni content and adding 0.5%CeO2 on the surface of 21-4-N heat-resisting steel was cladded by great power CO2 laser.The microstructure of the coating was observed.The microhardness,high-temperature dry friction and wear properties of the coating at different temperature were measured.The results show that the microstructure of Ni21＋20%WC＋0.5%CeO2 cladded layer is even small,adhesive wear and oxidation wear is the main mode at high temperature,and dry friction and wear properties are excellent.
出处
《热加工工艺》
CSCD
北大核心
2011年第4期106-109,共4页
Hot Working Technology
基金
湖南省科技计划资助项目(05JT1017)
湖南工学院重点科研资助项目(HGZ0601)
关键词
激光熔覆
CeO2稀土氧化物
镍基WC金属陶瓷涂层
高温干摩擦磨损
laser cladding
CeO2 rare-earth oxide
Ni-based WC metal-ceramic coating
dry friction and wear properties at high-temperature
