Optimization of Process Parameters of Laser Cladding Stellite6-8％WC Coating on 45 Steel
To determine the best process parameters for coating Stellite6-8％WC powder on the surface of 45 steel,laser power,scanning speed,and powder feeding rate were selected by the orthogonal test method,and three factors and three levels of the orthogonal test were carried out.Using the hardness and dilution rate of the cladding layer as evaluation indexes,range analysis was carried out to optimize the process pa-rameters of laser cladding Stellite6-8％WC.The results show that the laser power had the greatest impact on the hardness of the cladding layer,followed by powder feeding rate and scanning speed.Similarly,the dilu-tion rate of the cladding layer was most influenced by laser power,scanning speed,and powder feeding rate.The optimal process parameters were laser power 1 600 W,scanning speed 5 mm/s,powder feed rate 20 g/min,and the cladding layer was prepared by using the optimal process parameters,and the average micro-hardness was 397HV0.2,about 1.6 times that of 45 steel substrate.
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