Method for manufacturing forged article

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United States of America Patent

PATENT NO 11958101
APP PUB NO 20210245233A1
SERIAL NO

17056746

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Abstract

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A method for manufacturing a forged article, capable of improving the durability of a die for forging is provided. The method, includes forging a steel material, by using a die, by spraying or applying a water-soluble polymer lubricant containing 0.01 to 0.98 mass % of a water-soluble sulfate onto a working surface of the die, the die being made of a raw material having a constituent composition of by mass %, of 0.4 to 0.7% of C, 1.0% or less of Si, 1.0% or less of Mn, 4.0 to 6.0% of Cr, 2.0 to 4.0% of (Mo+½W), 0.5 to 2.5% of (V+Nb), 0 to 1.0% of Ni, 0 to 5.0% of Co, 0.02% or less of N, and a remnant composed of Fe and impurities, and having hardness of 55 to 60 HRC, and the die including a nitrided layer or a nitrosulfidized layer on the working surface thereof.

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Patent Owner(s)

Patent OwnerAddress
PROTERIAL LTDTOKYO 135-0061

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hayashi, Naoki Aichi, JP 299 2765
Ikeda, Nobuhiro Nara, JP 29 268
Inoue, Kenichi Tokyo, JP 148 1457
Koseki, Shuho Tokyo, JP 31 5
Miyamoto, Toshifumi Aichi, JP 10 79
Murakami, Satoshi Tokyo, JP 330 8310
Obata, Katsuhiro Tokyo, JP 3 5
Ogisu, Takashi Aichi, JP 1 0
Otomo, Toru Aichi, JP 1 0
Shouji, Tatsuya Tokyo, JP 10 1
Suzuki, Yoshikazu Aichi, JP 119 536
Uda, Kousuke Nara, JP 1 0

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