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在Ni基合金粉末中添加不同含量的(V2O5+WO3+C)粉末,通过改变激光功率在45#钢表面进行激光熔覆实验。采用XRD射线衍射、扫描电镜SEM对显微组织观察分析,采用渗透法检测熔覆涂层裂纹。实验表明,(V2O5+WO3+C)含量和激光功率均对熔覆涂层裂纹敏感性有影响。在(V2O5+WO3+C)含量为25%、激光功率1.4kW条件下,可获得无裂纹质量良好的Ni基激光熔覆涂层。
Different contents of (V2O5 + WO3 + C) powders were added to Ni-based alloy powders, and the laser cladding experiments were carried out on 45 # steel by changing the laser power. X-ray diffraction and scanning electron microscopy (SEM) were used to observe and analyze the microstructure. The crack of the coating was detected by the method of infiltration. Experiments show that both (V2O5 + WO3 + C) content and laser power have an impact on the crack susceptibility of the coating. Under the conditions of (V2O5 + WO3 + C) content of 25% and laser power of 1.4kW, a Ni-based laser cladding coating with good crack-free quality can be obtained.