Influence of Welding Parameter on Bead Geometry of Weld Metal in Submerged Arc Welding

Abstract

Submerged arc welding is generally used for fabrication large diameters line pipes, pressure vessels and wind turbines due to its high deposition rates, high-quality welds, ease of automation and low operation skills necessities. Submerged arc welding is characterized by a large number of process parameters influencing the performance of the output such as hardness two level and bead geometry, which subsequently affects the weld quality. In this research work, the effect of different welding parameters on drop geometry has been investigated. Four welding parameters specifically current, arc voltage, welding travel speed and nozzle-to-plate distance are selected. Mathematically model was developed from the data generated using two-level half factoring. The design expert 7 is implemented in order to find out significant and communication effect. It has been observed that width of the bead, penetration, reinforcement is an an increased with an an increase in welding current. The width of bead also an increases with an an increase in voltage but reinforcement and penetration decrease with an an increase in voltage. Nozzle to plate distance and welding speed produces very fewer effect on width of bead, penetration, and reinforcement.