In the current study, wire and arc additive manufacturing (WAAM) of thin-walled 308L stainless steel components was reported. Firstly, the influence of the welding current, the voltage, and the travel speed in the WAAM process on the geometry of single weld beads was investigated. These parameters were also optimized for the deposition of 308L steel walls. Secondly, the microstructure and the mechanical characteristic of WAAM 308L steel walls have been explored. The obtained results reveal the optimized that parameters giving the desirable geometry of single weld beads for building 308L walls by the WAAM process. The microstructure of WAAM 308L steel walls mainly features the dendrites of austenite growing vertically and residual ferrite existing in grain boundaries of the austenite matrix. The microhardness of the built material is about 163 HV_0.1. The UTS, YS and elongation of WAAM 308L walls are 532–553 MPa, 344–353 MPa, and 40–54%, respectively, which are relatively similar to those of wrought 308L stainless steel (UTS: 530–650 MPa, YS: 360–480 MPa, and elongation: 35–45%). Thus, the mechanical properties of WAAM 308L steel walls are considered to be adequate for industrial applications.

在当前的研究中，报道了薄壁308L不锈钢部件的电弧焊和电弧增材制造（WAAM）。首先，研究了WAAM工艺中焊接电流，电压和行进速度对单个焊道几何形状的影响。这些参数也针对308L钢壁的沉积进行了优化。其次，探讨了WAAM 308L钢墙的微观结构和力学性能。获得的结果揭示了优化的参数，该参数给出了通过WAAM工艺构建308L墙所需的单个焊道所需的几何形状。WAAM 308L钢壁的微观结构主要表现为奥氏体垂直生长的枝晶和奥氏体基体晶界中存在的残留铁素体。建材的显微硬度约为163 HV_0.1。UAM，YS和WAAM 308L壁的伸长率分别为532–553 MPa，344–353 MPa和40–54％，这与锻造308L不锈钢（UTS：530–650 MPa，YS： 360–480 MPa，伸长率：35–45％）。因此，WAAM 308L钢墙的机械性能被认为足以用于工业应用。