Method for producing hot forged material

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United States of America Patent

PATENT NO 11358209
APP PUB NO 20200222969A1
SERIAL NO

16650296

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Provided is a method for producing a hot forged material capable of preventing the generation of double-barreling shaped forging defects. The method for producing a hot forged material, wherein both an upper die and a lower die are made of Ni-based super heat-resistant alloy and the method comprises a hot forging step of pressing a material for hot forging by the lower die and the upper die in the air to form the hot forged material, the method comprising: a raw material heating step of heating the material for hot forging in a furnace to a heating temperature within a range of 1025 to 1150° C.; a die heating step of heating the upper die and the lower die to a heating temperature within a range of 950 to 1075° C.; and a transferring step of transferring the material for hot forging onto the lower die by a manipulator after the completion of the raw material heating step and the die heating step, wherein a value obtained by subtracting the heating temperature of the upper die and the lower die from the heating temperature of the material for hot forging is 75° C. or more.

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Patent Owner(s)

Patent OwnerAddress
HITACHI METALS LTDTOKYO 108-8224

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kobayashi, Shinichi Tokyo, JP 271 4215
Matsui, Takanori Tokyo, JP 15 21
Suzuki, Shogo Tokyo, JP 171 1015
Takahashi, Shoichi Tokyo, JP 33 387
Ueno, Tomonori Tokyo, JP 66 292

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