Journal of Welding and Joining

: Journal of KWJS. 2007;25(4):49-57. Published online September 21, 2007.; Analysis and Optimization of the Cladding Parameters for Improving Deposition Efficiency in Cladding using a Low Power Pulsed Nd:YAG Laser; Hyoung-Keun Lee

Abstract: The optimization of the cladding parameters was studied to maximize the deposition efficiency in the laser cladding using a low power pulsed Nd:YAG laser. STS304 stainless steel plate and Co alloy powder were used as a substrate and powder for cladding, respectively. The six cladding parameters were selected through preliminary experiments and their effects on the deposition efficiency were analyzed statistically. Experiments were designed and carried out using the Taguchi experimental method using a L18 orthogonal array. It was found from the results of analysis of variance(ANOVA) that the powder feed position and powder feed angle had the most significant effects on the deposition efficiency, but the powder feed rate and laser focal position had nearly no effects. The deposition efficiency could be maximized at 0mm of the powder feed position and 50o of the powder feed angle in the experimental range. From this experimental analysis, a new laser cladding head with 20o of the powder feed angle was designed and manufactured. With a new laser cladding head, the highest deposition efficiency of 12.2% could be obtained.

Keywords :Laser cladding;Cladding parameters;Deposition efficiency;Taguchi method;Optimization