Process of 7N01 Aluminum Alloy Welding by Hybrid Laser-MIG Welding Method

Hybrid laser-MIG welding parameter of 7N01 Aluminum alloys is optimized through changing the output power of the laser, the arc current, and welding speed. The tensile strength under different welding parameters, and the microstructure of the joint were studied. The results show that excellent jonts can be obtained using hybrid laser-MIG welding, the tensile strength is 256.94 MPa, which reaches up to 59.75% of the parent material's strength. And the porosity of the joints can be avoided by changing the power of the laser and the arc current, the dendrite crystal and the isometric crystal are the main crystal form of the joint.