Pilot Study for Selection of Process Parameters During Joining of AISI 304 and Duplex 2205 using Gas Metal Arc Welding

In automotive industries, Gas metal arc welding (GMAW) process is widely used for fabrication of different plates of metal. For fabrication process material of different thickness is used. Due to high input energy of GMAW and low stiffness of material suitable process parameters are selected for fabrication. In the present pilot study AISI 304 and Duplex 2205 of thickness 5 mm is used for joining two dissimilar metals. A pilot study is done to select the process parameters such as welding current, voltage, shielding gas, filler wire and gas flow rate for joining the plates. Effect of CO₂ as a double layer shielding gas is also considered in the present study. From the pilot study it has been concluded that too low value and too high value of process parameter selected results in poor weld bead so it is necessary to select process parameters in a proper range.