Effect of Submerged Arc Welding Process Parameters on Weld Joint of IS-2062 Grade B Steel

Abstract

Submerged arc welding (SAW) is one of the oldest automatic welding processes to provide high quality of weld. The quality of weld in SAW is mainly influenced by independent variables such as welding current, arc voltage, welding speed, and electrode stick out. The prediction of process parameters involved in SAW is very complex process. Researchers attempted to predict the process parameters of SAW to get smooth quality of weld. The aim of the present work is to study the effect of various process parameters i.e. current, voltage and travel speed on changes in Impact strength, hardness, depth of penetration and microstructure of the weld bead geometry of IS 2062 Grade B Steel and to optimize the process so that minimal changes occur in the material properties after completion of a submerged arc welding (SAW) process following suitable Taguchi experimental design and multiple regression analysis. In this report, experiments have been conducted using welding current, arc voltage and welding speed as input process parameters for evaluating multiple responses namely impact strength, microstructure, depth of penetration and bead hardness. Impact strength of the welded specimens were studied and found that welding voltage is most significant factor leads to change in impact strength. The impact strength tended to increase significantly with the increase in voltage from 30 to 32V. Similarly results of depth of penetration, micro-hardness are analyzed in by using taguchi and multiple regression analysis