Improve GMAW and GTAW with Alternating Shield Gases

摘要

The technology of alternating shield gases improves weld penetration and ductility, and reduces porosity and cracking for aluminum alloys. It reduces welding distortion, and improves penetration and welding speed for stainless steel or similar high-alloy materials. The technology may be applicable to GMA and GTA welding of different base materials or with different shield gases. To take the advantages of the technology to the fullest extent for different welding processes, optimization of shield gas flow ratios and alternating frequency may be necessary.