Method for producing hot-forged material
AssigneeProterial, Ltd.
InventorsShogo Suzuki, Tomonori Ueno
Life of this patent
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Abstract
Described herein are methods for producing a hot forged material in air using a Ni-based superalloy for the die. Also described herein are methods 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 %.
Claims10
A method for producing a hot forged material by hot forging in which a die surface temperature is 1000° C. or more, comprising:
- applying a second glass-based lubricant of a glass powder or a mixture of a powder and a dispersant onto each surface of a lower die and an upper die in contact with a material for hot forging to coat the surfaces with a lubricating film formed by the second glass-based lubricant, the lubricating film having a thickness of 100 μm or more and the glass powder comprising SiO2 as a main component and further comprising Al2O3 and CaO, wherein a total content of alkali metal oxides in the glass powder is 0 to 10.0% in mass %;
- heating the material for hot forging at a hot forging temperature of 1000° C. or more to provide a heated material;
- placing on the lower die the heated material for hot forging, wherein part or all of a surface of the material for hot forging is coated with a first glass-based lubricant;
- and
- pressing the material for hot forging with the lower die and the 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 Ni-based superalloy comprises, in mass %, Cr in an amount of 1.0 to 7.5%.
Dependencies are inferred from the claim text.