Influence of Welding Parameters on Bead Geometry in GMAW Vertical Down Position

The influence of welding parameters on the weld bead geometry in the vertical down position has been investigated with GMA welding process. Both solid and flux cored wires have been used for investigations. The results are compared with those obtained for similar investigations in the flat position welding.

Investigations have revealed that in vertical down position within a certain range of welding current, voltage and welding speed, the weld geometry is influenced in the same way as in the case of flat position. However, beyond these ranges of welding parameters the weld bead geometry is appreciably influenced by welding position. There is also an appreciable influence of flux cored wire, over solid wire, on weld geometry.