This study analyzes the effects of Post Weld Heat Treatment (PWHT) on the mechanical properties and microstructure of Inconel 617 weldments produced by the Activated Tungsten Inert Gas (A-TIG) welding and Tungsten Inert Gas (TIG) welding. The TIG weld joints considered for this study were in an as-welded condition and underwent two different conditions of heat treatment including 1050^∘C for 3 and 5$$h, respectively. The A-TIG weld joints studied were the as-welded type and the weldment was heat-treated at 1050^∘C for 3$$h. The microstructure and the characterization of mechanical properties were performed for all weldments and a comparative assessment was made. Tensile strength and the hardness of the heat-treated samples were considerably higher than that of the as-welded samples. Impact toughness was slightly reduced after PWHT. Improvement in tensile strength could be attributed to the precipitation of the carbides and segregation of Chromium (Cr) and molybdenum (Mo).

本研究分析了焊后热处理 (PWHT) 对活性钨极惰性气体保护 (A-TIG) 焊接和钨极惰性气体保护 (TIG) 焊接产生的 Inconel 617 焊件的机械性能和微观结构的影响。本研究考虑的 TIG 焊接接头处于焊接状态，并经历了两种不同的热处理条件，包括 1050 ^∘ C 3 和 5$$分别为h。研究的 A-TIG 焊接接头为焊态类型，焊件在 1050 ^∘ C 下进行了 3 次热处理$$H。对所有焊件进行了显微组织和机械性能表征，并进行了比较评估。热处理样品的拉伸强度和硬度明显高于焊接样品。PWHT 后冲击韧性略有降低。拉伸强度的提高可归因于碳化物的沉淀以及铬（Cr）和钼（Mo）的偏析。