Method for producing Fe-Ni base superalloy

摘要

PROBLEM TO BE SOLVED: To provide a production method for an Fe-Ni-based super alloy, enabling remelted ingot having less various defect to be obtained by preventing cracks in a consumable electrode during a cooling process after primary melting.SOLUTION: The production method for an Fe-Ni-based super alloy having a 718 alloy composition is provided that comprises a primary melting step of producing a consumable electrode for remelting by the primary melting, a furnace charging step of charging the consumable electrode obtained in the primary melting step to a heating furnace at 300 to 600°C before the consumable electrode is cooled to less than 300°C, a heating maintaining step of heating the consumable electrode charged into the heating furnace to 850°C or more and maintaining the consumable electrode at 850°C or more and a remelting step of conducting remelting by using the consumable electrode having passed through the heating maintaining step.SELECTED DRAWING: Figure 1