Influence of CMT and GMAW Processes on the Microstructure and Mechanical Properties of SS۳۱۰ Fabricated by Wire-Arc Additive Manufacturing

Wire-arc additive manufacturing (WAAM) is a prominent technique for producing large metallic components due to its high deposition rate. Utilizing austenitic stainless steels in this process not only reduces production costs but also provides greater design freedom. Among these steels, SS۳۱۰, known as heat-resistant steel in the industry, offers excellent oxidation resistance and high-temperature performance. However, it is highly susceptible to hot cracking during welding and additive manufacturing processes. In this study, the microstructure and mechanical properties of SS۳۱۰ fabricated using WAAM with Cold Metal Transfer (CMT) and Gas Metal Arc Welding (GMAW) processes were compared. The results revealed that the CMT process, due to its lower heat input, effectively reduces the susceptibility of SS۳۱۰ to hot cracking compared to the GMAW process. These findings emphasize the importance of selecting an appropriate process to achieve high-quality components and minimize structural defects.

کلیدواژه ها:

Wire Arc Additive Manufacturing ، CMT ، GMAW ، Stainless Steel ، Mechanical Properties ، Microstructure