摘要
以B4C粉、Ti粉和Fe粉末为原料,采用氩弧熔覆技术在Q235钢基体表面制备出增强复合涂层。利用扫描电镜,X射线衍射仪,显微硬度仪和摩擦磨损试验机等对复合涂层的组织,相组成,硬度和耐磨性能进行了研究。结果表明:熔覆层相由α-Fe、颗粒状Ti C和Ti B构成,Ti C颗粒弥散分布在基体上,涂层显微硬度高达700HV0.2,耐磨性能比Q235钢基体提高约6倍。
The reinforced composite coating was prepared on the surface of Q235 steel by means of ar- gon arc cladding technique with the pre - alloyed powder of B4C, Ti and Fe. The microstructure, phase？ composition, hardness and wear resistance of the composite coating have been researched u- sing SEM, X -ray diffraction, microhardness tester and wear and abrasion test machine. The results show that the coating is composed mainly of ot - Fe and TiC particles and TiB, the TiC particles are dispersed in the substrate, the microhardness of the Coating can reach 700HV0.2, and the wear re- sistance is about 6 times higher than that of Q235 steel substrate.
基金
黑龙江省教育厅骨干教师资助项目(1253G051)
关键词
Q235钢
氩弧熔覆
显微组织
耐磨性
Q235 steel
Argon arc cladding
Microstructure
Wear resistance
