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박경동(K. D. Park),정재욱(J. W. Jung) 한국동력기계공학회 2004 한국동력기계공학회 학술대회 논문집 Vol.- No.-
Above all Ni-alloys Inconel 625 is used widely in plate of welding structural materials such as turbine case, a combustor of liner. In general, weldability of Inconel 625 is not well because of poorly liquids of weld metal also it have a broken probability of the welding crack. In case of FCAW weld process, it is not easy to develope of welding materials, because it is possible only fillet welding at view position of look down except for butt welding. But recently, though it is more used by FCAW process, owing to welding materials worked at the vertical position. the study for FCAW weld of Inconel 625 is actively not yet worked. In this study, the weldability and weld characteristics(mechanical characteristics, corrosive property) of Inconel 625 are considered in FCAW weld associated with the several shielding gases((80%Ar + 20% CO2, 50%Ar + 50% CO2, 100% CO2) in viewpoint of welding productivity. The results of impact test are follows; It was evaluated 70J at shielding gase of 100% CO2, and obtained about 35J at the other shielding gases. If it was used for parts be required the impact value at the extremely low temperature, it is expected to have the advantage of using the 100% CO2 shield gase than the others.