Prediction of the Effect of Submerged Arc Welding Process Parameters on Weld Bead Width for MS 1018 Steel

The present investigation uses arc voltages, current, welding speed, wires feed rate and nozzle-to-plate distance as process parameters. Two level full factorial a technique has been used for experiment design. Multiple regression analysis has been used to develop a mathematical model to predict weld width using a single wire Submerged arc welding depositing bead-on-plate welds on 12mm plate. Adequacy and significance of the model has been checked by using analysis of variance, F-test and t-test respectively. Main and interaction effects of process variables on weld-width have been graphically presented. Experiments have been performed to compare the results obtained with the corresponding predicted values. The models developed have been found to be adequate with a confidence level 95%.Weld width has been found to increase with increase in voltage, current and wire feed rate and decreases with increase in welding speed and nozzle-to-plate distance. Cross validation test fulfills the validity of the model developed. KeywordsFull Factorial Technique, Mathematical Modelling, Submerged Arc Welding, Welding Process Parameters, Weld Bead Width.