Importance

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Abstract

To provide a method for producing a hot forged material in air, using a Ni-based super alloy for the die, which is advantageous in terms of the service life of the die, and using a glass-based lubricant which hardly causes any chemical reaction promoting oxidative corrosion. A method for producing a hot forged material, by placing on a lower die a material for hot forging, of which part or all of the surface is coated with a glass-based lubricant, and pressing the material for hot forging with the lower die and an upper die, to form a hot forged material, wherein one or both of the lower die and the upper die are made of a Ni-based superalloy, and wherein the surface of the die in contact with the material for hot forging is coated with a glass-based lubricant containing SiO₂ as a main component, in which the total content of alkali metal oxides is 0 to 10.0% in mass %.

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First Claim