化学沉积法合成WC/Co粉体及其激光熔覆涂层的制备

Preparation of WC/Co powders by electroless plating and its coating on 2Cr13 stainless steel by laser cladding

采用化学沉积法合成了WC/Co复合粉体,通过激光熔覆的方法在2Cr13不锈钢基体上制备WC/Co复合涂层,并对复合粉体的成分、激光熔覆涂层的形貌、结构和性能进行研究。结果表明复合粉体中Co的含量为17.23wt%,经过激光熔覆的复合涂层与基体之间达到了冶金结合,激光熔覆涂层可以分为三个区域熔化区(合金层),结合区及基材热影响区,复合涂层的显微硬度达到1200HV0.1。

WC/Co composite powders prepared by electroless plating were coated on 2Cr13 stainless steel by laser cladding. The composition, morphology, microstructure and performance of the WC/Co composite coating were studied. The results show that the WC/Co composite powders contain about 17.23wt% of Co.It is found that the composite coating is metallurgically bonded to the substrate.The coating consists of three zones: melting zone, bonding zone and heat affected zone of the substrate. The micro-hardness of the coating reaches 1200HV_ 0.1 .