The Effect Of Torch Angle On Physical Properties Of Weldment Area

Tan, Wee Khang (2011) The Effect Of Torch Angle On Physical Properties Of Weldment Area. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Gas Metal Arc Welding (GMA W) is a useful tool for joining process because of its high deposition rate, eliminates slug and flux removal, reduction in fumes and smoke, and its versatility with wide and broad application ability. However, a common tactic for many welders are to change the welding torch angle based on their comfortability even those with years of experiences. This results in a relatively good starting angle but ends up with very different form compared to the original set up. Therefore, this situation has form non-unifonn welding bead and different physical properties on weldment surface. Torch angle can have large effects on the bead appearance and its structure, thus this study has been carried out to investigate on the parameter to produce high strength weld structure with minimum heataffected zone. Proper adjustment of the torch angle can produce smooth controlled clean weld and prevent spattery and unstable weld. Tensile test and microscope examination are conducted to study the physical properties of the weldment area. It was fotmd that the 30° welding angle has a maximum stress 423 N/mm2 and good welding penetration among other angles.

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