Experimental and Statistical Analyses of Geometry Characteristics of GH4169 Layer Fabricated via Laser Cladding
J. Zhang, Y.J. Xu, Q. Xu, J. Q Chen and C.L. Shen
In laser cladding, the single clad track’s geometry is significantly influenced by the processing parameters. In this study, the impacts of the key processing parameters (laser power, cladding velocity and powder feed rate) on the single clad track’s geometry characteristics of laser clad layer are studied with depositing GH4169 powder on GH4169 forged plate via laser cladding. Geometry characteristics models are developed using the multiple regression analysis method. The analysis results show that laser power has positive impact on all characteristic dimensions of clad layer, while powder feed rate has negative effect on the width, depth, W/H and dilution rate of the clad layer except the height of clad layer. The cladding velocity has positive impact on the W/H of the clad layer and negative effect on the width, depth, height and dilution rate of the clad layer. Based on the experimental results, the mathematical models are created and tested by the analysis of variance (ANOVA). Finally, the validation results show that the predicted values are in agreement with the measured ones, which confirms the reliability of the models derived from the regression analysis.
Keywords: Laser cladding, GH4169, geometry characteristics, regression analysis, laser processing parameters