In this paper, the utilization of gas-metal-arc-welding additive manufacturing (GMAWAM) for the repurposing of components was explored. Herein, the GMAWAM process was used to build new low-carbon steel features on an existing low-carbon steel component to obtain a new part with new functionalities. To confirm the internal quality of the new part obtained by such a strategy that is adequate for real applications, its material properties were investigated. The obtained results reveal that the new features (i.e., thin walls) built by GMAWAM possess different microstructure types. The upper region of thin-walled features exhibits lamellar structures, whereas the middle region is characterized by granular structures, and mixed equiaxed and lamellar grains appear in the bottom region. Particularly, the new features have an excellent bonding strength with the existing part. The material properties of GMAWAM-repurposed parts also meet industrial requirements, confirming that the GMAWAM-repurposed parts are adequate with real applications.

本文探讨了利用气保弧焊增材制造（GMAWAM）来重新利用组件的功能。本文中，GMAWAM工艺用于在现有低碳钢部件上构建新的低碳钢特征，从而获得具有新功能的新零件。为了确认通过这种策略获得的适合实际应用的新零件的内部质量，我们对其材料性能进行了研究。所得结果表明，由GMAWAM建立的新特征（即薄壁）具有不同的微观结构类型。薄壁特征的上部区域显示出层状结构，而中间区域的特征在于颗粒结构，并且在底部区域出现了混合的等轴和层状晶粒。尤其，新功能与现有零件具有出色的粘合强度。GMAWAM改装零件的材料性能也符合工业要求，这证实了GMAWAM改装零件适合实际应用。