Abstract: A method of producing a metal superalloy may include: providing a charge of metal materials; melting the charge of metal materials in an electric-arc furnace to obtain a first melt of the charge of metal materials; performing Argon Oxygen Decarburization (A.O.D.) treatment on the first melt to obtain a decarburized and refined first melt; solidifying the decarburized and refined first melt to obtain first ingots; melting the first ingots in a Vacuum Induction Degassing and Pouring (V.I.D.P.) furnace to obtain a second melt; solidifying the second melt to obtain second ingots; melting the second ingots in a Vacuum Arc Remelting (V.A.R.) furnace to obtain a third melt; and solidifying the third melt to obtain the metal superalloy. The charge of metal materials may have a weight greater than or equal to forty tons and less than or equal to sixty tons.

Abstract: Manufacturing method of a nickel-based alloy comprising the steps of forging and solution treating a metal mass of the composition described, subjecting the product to a first step of ageing at a higher temperature and a step of cooling in air, to a second step of ageing at a lower temperature and a step of cooling in air to obtain the nickel-based alloy. As a result of steps i)-v)), said alloy comprises metal hardening phases precipitated uniformly throughout its grains. The invention further relates to nickel-based alloys and a use of such alloys.