OPTIMIZATION OF WELDING PARAMETERS USING TAGUCHI STATISTICAL APPROACH

The present paper deals with the tensile strength and Rockwell hardness of the weld joint optimised using Taguchi statistical approach. Gas Metal Arc Welding is carried out to create the weld joint between EN8 and Stainless Steel. Preheat temperature, Gas flow rate and Welding current are the parameters to be optimised. All the parameters are taken at 3 level and thus using degree of freedom, 9 set of experiments are carried out. Signal-to-noise ratio of each set of experiment is calculated and thus the optimised set of experiment in both cases, tensile strength and hardness of the joint, is evaluated. The final results exhibit a difference of 6% and 10% respectively for tensile strength and hardness from the measured values.