The presence of large dendrites and alloy segregation in as-deposited wire arc additive manufacturing (WAAM) products results in a wide range of mechanical properties that are often inferior to wrought ones. In this study, the effect of inter-layer cold working on the microstructure and mechanical properties of AISI 347 samples manufactured by WAAM has been investigated. The average hardness of single-pass welding, as-deposited, and cold worked WAAM samples were 190 HV, 249 HV, and 323 HV, respectively. Inter-layer cold working has led to an increase in ultimate tensile strength from 576 MPa to 803 MPa and yield strength from 395 MPa to 697 MPa. Also, Inter-layer cold working and thermal energy due to the deposition of subsequent layers have resulted in microstructural evolution and grain refinement through recrystallization. Besides, a semi-quantitative analysis has shown that increasing the amount of cold working by four times resulted in 64 % decrease in average recrystallized grain size.

在沉积的电弧增材制造（WAAM）产品中存在大的枝晶和合金偏析会导致广泛的机械性能，通常不如锻造的。在这项研究中，研究了层间冷加工对WAAM生产的AISI 347样品的显微组织和力学性能的影响。单道焊，沉积和冷加工WAAM样品的平均硬度分别为190 HV，249 HV和323 HV。层间冷加工导致极限抗拉强度从576 MPa增加到803 MPa，屈服强度从395 MPa增加到697 MPa。同样，由于后续层的沉积而引起的层间冷加工和热能也导致了组织的发展和通过重结晶的晶粒细化。除了，