Publication

Abstract : The bead geometry has significant impact on the quality of the cladded surface. This paper models the bead geometry using selected flux cored arc welding process parameters. The experimental design was based on central composite rotatable design to minimize the number of experimental runs for modelling the relationship. The relationship between input variables and bead geometry was established using the data measured from 32 deposits. The models were tested for its validity using statistical and experimental methods. The second order regression models were combined using weighted aggregation method to optimize the multiple objectives of weld cladding process. Pareto front is developed to indicate the non-dominated solutions between the bead geometry and dilution. 1. Introduction Weld cladding is preferred surface modification technique to improve the corrosion resistance of the low cost substrate. Welding is widely used to process prefabricated intricate shapes, reconditioning and repair of earlier deposits. The availability of various welding processes with different levels of heat input can be easily adopted to manipulate composition and deposition rate. The advantages of Flux cored arc welding (FCAW) over other welding processes are higher deposition rate, smooth weld appearance, better positional and automation capabilities. The bead geometry and percentage dilution in has been influenced by the electrode melting rate and