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Gaussian pulsed MIG welding of aluminum alloy sheet
Pages: 71-74+90+132
Year: Issue:  8
Journal: Transactions of the China Welding Institution

Keyword:  aluminum alloy sheetGauss functionpulsed metal inertia gas weldingcurrent waveform control;
Abstract: It is hard to weld aluminum alloy for its inherent features. A new welding method,which uses a Gaussian current waveform with a smooth curve and concentrated energy input,was applied to welding of aluminum alloy sheet. GAUSSMIG welding model was proposed,2 mm and 3 mm aluminum sheet were successfully welded in experiments. Current and voltage waveforms were regular with no broken arcs or short circuits.Moreover,the arc voice sound was soft with low splatter. By contrast with double pulsed welding,GAUSS-MIG welding improves the mechanical properties of weld,weld seam appearances are bright with regular scaly stripes and proper weld reinforcement and penetration.
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