Effect of plasma welding current on heat source penetration ability of plasma-GMAW hybrid welding

The weld penetration under different plasma welding currents was compared in the plasma-gas metal arc (GMAW) hybrid of aluminum alloy. When current lower than 150 A, greater sum single and GMAW penetration. reached 130 with increase current, advantage gradually weakened, that welding. above change mechanism is revealed from heat source energy distribution molten pool stress. results show when 110 area high-temperature region zone increases, GMAW. trend transfer to direction increases action pressure, shear force, electromagnetic droplet impact. With first then decreases. reaches effect impact on increasing begins weaken.