High-speed Dual-wire Aluminum Alloy Gas Shielded Welding Processes And Pool Transition Behavior

The typical joint speciation window was got by testing of 10mm-40 mm Al-alloy plate double wire gas-arc welding. The average value of σ_ b could reach 280MPa which was more than 10% that of single wire welding. On the base reason of normal welding defaults, the welding speciation was optimized and good molding and excellent welding joint were acquired. Examination and research shows that melting drop transform mode of Al-alloy double wire welding included sub-shot stream, shot drop mainly, short circle, shot stream and other variant transform mode. Melting pool picture was obtained clearly by video sensor. Geometry character of melting pool was gained originally which provide technology data for quality control of double wire gas-arc welding by on-line video. Manufacture guidance was provided by Process of Al-alloy Double wire gas-arc welding from different transform mode.