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研究了3种不同功率(18 kW、22 kW、26 kW)对激光熔覆WCP/Ni基金属陶瓷涂层的组织与磨损性能的影响.选择合适的激光功率(22 kW)，可以获得WCP均匀分布并与基体合金结合良好的WCP/Ni涂层.激光熔覆过程中WC颗粒与基体合金界面间发生了扩散反应溶解,导致未熔WC颗粒周围形成了块状的富W碳化物，功率较高时更加明显.激光熔覆WCP/Ni基涂层由未熔WC颗粒，块状或枝晶状的富W碳化物，杆状的富Cr碳化物以及其间的γ枝晶固溶体及其共晶组织所组成.不同激光功率下的WCP/Ni涂层的显微硬度与耐磨性均远高于Ni60涂层，其中22 kW功率的WCP/Ni基涂层的显微硬度最高，耐磨性最好.

Effect of different laser powers on microstructures and wear properties of laser cladding WCP/Ni etal ceramics coating was studied in this paper.The WCP/Ni alloy coating with the even-distributed WC ceramics phases and the better bond with the substrate alloy was obtained by choosing 2.2 kW power.Diffusion reaction solution happened between the WC particles and the substrate alloy during laser cladding,giving rise to the formation of block rich-tungsten carbide on the edges of the WC particles,especially in higher power.The WCP/Ni alloy coating consisted of the undissolved WC particles,the block or dendritic rich-tungsten carbide,the bar-like rich-chromium carbide.and dendrit e solid solution and eutectic structure among them.Microhardness and wear resistance of the WCP/Ni coating in different powers were much higher or better than Ni60 alloy coating,and were best in 2.2 kW power.