Device and method for manufacturing gradient material through alternating-current-assisted double-wire argon arc welding additive

The invention relates to the technical field of welding, in particular to a device and method for additive manufacturing of gradient materials through alternating-current auxiliary double-wire argon arc welding, and the device comprises an alternating-current welding machine, a tungsten electrode argon arc welding gun, a first wire feeder, a second wire feeder, a substrate, a high-speed camera, a tungsten electrode argon arc additive manufacturing power source, a wire and a gas cylinder. The tungsten electrode argon arc additive manufacturing power source is connected with a gas cylinder, the positive electrode of the tungsten electrode argon arc additive manufacturing power source is connected with the substrate through a wire, and the negative electrode of the tungsten electrode argon arc additive manufacturing power source is connected with the tungsten electrode argon arc welding gun through a wire. By increasing the welding wire feeding speed of the second wire feeder, bridging transition of the welding