To study the forming rule, microstructures and mechanical properties of Al-Zn-Mg alloy samples produced by wire + arc additive manufacturing (WAAM), a metal inert gas (MIG) arc was used as the heat source and 1.2-mm-diameter Al-6.2Zn-2.2Mg welding wires were used as the raw materials during single-pass, single-layer deposition and single-pass, multilayer deposition. In the single-pass, single-layer deposition, as the heat input increased, the number of ripples on the weld bead decreased, thereby making the surface smoother. Furthermore, under different parameters, there were always pores in the cross section of the weld beads. In the as-deposited material, the elements were unevenly distributed due to the layer-by-layer deposition. There were two types of pores in the as-deposited material: pores caused by the presence of hydrogen and those caused by the burning loss of zinc. The as-deposited material exhibited an average hardness of 112 HV. The horizontal test samples exhibited an average tensile strength of 324 MPa, a yield strength of 208 MPa, and an elongation of 9.66%. The vertical test samples exhibited an average tensile strength, yield strength and elongation of 299 MPa, 188 MPa and 8.98%, respectively. Moreover, the samples exhibited mixed ductile-brittle fractures.

为了研究线+电弧增材制造（WAAM）生产的Al-Zn-Mg合金样品的形成规律，组织和力学性能，以金属惰性气体（MIG）电弧为热源，直径为1.2 mm的Al -6.2Zn-2.2Mg焊丝用作单道次，单层沉积和单道次，多层沉积的原料。在单道次，单层沉积中，随着热量输入的增加，焊缝上的波纹数量减少，从而使表面更光滑。此外，在不同的参数下，焊缝的横截面中总是有孔。在沉积的材料中，由于逐层沉积，元素分布不均匀。沉积材料中有两种类型的孔：氢的存在和锌的燃烧损失造成的孔隙。所沉积的材料表现出112 HV的平均硬度。水平试样的平均抗拉强度为324MPa，屈服强度为208MPa，伸长率为9.66％。垂直试样的平均抗拉强度，屈服强度和伸长率分别为299 MPa，188 MPa和8.98％。此外，样品表现出混合的韧性-脆性断裂。分别。此外，样品表现出混合的韧性-脆性断裂。分别。此外，样品表现出混合的韧性-脆性断裂。