【摘要】 以正交实验规则设计3D激光熔覆试验来研究不同工艺参数对熔覆指标的影响,实验表明,WC添加量对熔覆层硬度、抗磨性影响最大,激光功率影响稍次之,激光扫描速度影响次之,送粉速度影响最小。对熔覆层组织分析表明,随WC添加量增多,更易生成CrB、W2B等硬质相,未分解的WC颗粒也越多,粘结相Ni枝晶越细小。激光熔覆Ni基WC合金涂层表面摩擦磨损特性表现为以磨粒磨损为主,塑性变形、粘着磨损和磨粒磨损相结合。更多还原

【Abstract】 The effects of different parameters on the 3Dcladding parameters were studied by orthogonal experimental design.The results showed that the effect of WC addition on the hardness and wear resistance of the cladding layer was the most.The analysis of the microstructure of the cladding layer showed that the CrB,W2 B and other hard phases were more easily generated by WC addition,and the more the WC particles were not decomposed,the smaller the bonded phase was Ni.The friction and wear characteristics of Ni based alloy coating on the surface of the laser cladding layer of WC alloy coating show that the abrasive wear is the main wear,and the plastic deformation,adhesive wear and abrasive wear are combined.更多还原