Powder mixture for powder metallurgy and method for producing powder mixture for powder metallurgy

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United States of America Patent

PATENT NO 11946119
APP PUB NO 20210197258A1
SERIAL NO

17059210

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Abstract

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Provided is a powder mixture for powder metallurgy that has excellent fluidity, can be ejected from a green compacting die with little force, and can suppress die galling in forming. The powder mixture comprises: a raw material powder; a copper powder; a binder; a graphite powder; and carbon black. The raw material powder contains an iron-based powder in an amount of 90 mass % or more with respect to the raw material powder. An average particle size of the graphite powder is less than 5 μm. Additive amounts of the binder, the graphite powder, the copper powder, and the carbon black are in specific ranges. A surface of the raw material powder is coated with at least part of the binder. A surface of the binder is coated with at least part of the graphite powder, at least part of the copper powder, and at least part of the carbon black.

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Patent Owner(s)

Patent OwnerAddress
JFE STEEL CORPORATION2-3 UCHISAIWAI-CHO 2-CHOME CHIYODA-KU TOKYO 1000011 JAPAN

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Oya, Masato Tokyo, JP 2 1
Unami, Shigeru Tokyo, JP 40 200

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