Investigation of Bead Geometry Parameters During MIG Welding of Stainless Steel 202 Plates

The gas metal arc welding (GMAW) is a high-deposition-rate fusion welding process. GMAW can be a semi-automatic or fully automatic arc welding process in which we use a continuously feed electrode coated with flux. The base metal used in present work is austenitic stainless steel of grade 202 (SS 202). The stainless steel of grade 202 metal is broadly used in industries for their diversification application such as ship building industries, chemical industries, and power plants. SS 202 material will provide a good corrosion resistive capability, toughness, and strength at a comparatively low price as compared to their other stainless steel such as 300 and 400 grade series. Our present work investigates the bead geometry on the SS 202 plates and observing the various impacts on geometry of bead by changing the input variables such as welding speed, voltage, and wire feed rate (WFR); from recent research, it has been found that welding parameters such as voltage, welding speed, and wire feed rate (WFR) have dominance on bead parameters. The strength and grade of weld produced are decided by its bead parameters like penetration depth, width of weld bead, and height of reinforcement. Our goal is made to find out the relation between input parameters and bead geometry through a central composite face center design model (CCFD) whose satisfactoriness is tested by using ANOVA technique analysis to write a mathematical quadratic equation to reach out with the most favorable results.