摘要
以碳化钨粉、镍粉、钴粉为原料,利用氩弧熔覆技术在Q235钢基体表面制备了WC质量分数分别为65%,70%,75%的WC/NiCo硬质覆层。用金相显微镜对覆层的显微组织和界面组织进行了分析,用显微硬度计和摩擦磨损试验机测试了覆层显微硬度和相对耐磨性。结果表明:氩弧熔覆的WC/NiCo覆层主要由WC硬质相、NiCo粘结相组成,WC硬质颗粒弥散分布在NiCo基粘结相中。以上3种WC质量分数的WC/NiCo覆层的显微硬度分别为9.03,10.19,11.51HV,相对耐磨性分别为W9Mo3Cr4V钢的6.02倍、6.17倍和6.22倍。
WC/NiCo hard alloy cladding with 65%, 70% and 75% WC were prepared on the surface of Q235 steel by means of argon arc cladding technique with powders of WC, Ni and Co. Microstructures of cladding and interface were investigated by means of metallurgical microscope. Vickers micro-hardness and relative wear resistance were tested by micro-hardness instrument and friction-wear test. The results show that the microstructure of NiCo based WC coating consists of WC particles and nickel cobalt based phase, which WC was distributed in nickel cobalt phase. The test results of micro-hardness and relative wear resistance show that the average vickers micro-hardness of WC/NiCo cladding with different WC are 9.03HV, 10.19HV and 11.51HV. Relative wear resistance are 6.02 times, 6.17 times and 6.22 times of W9Mo3Cr4V steel separately.
出处
《表面技术》
EI
CAS
CSCD
北大核心
2011年第5期35-37,共3页
Surface Technology
关键词
氩弧熔覆
覆层
显微硬度
相对耐磨性
argon arc cladding
cladding
micro-hardness
relative wear resistance
