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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11946119 B1

PDFFull Text
Date of Patent:
Apr. 02, 2024

Filed:

Apr. 22, 2019

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

Applicant:

Jfe Steel Corporation, Tokyo, JP;

Inventors:

Masato Oya, Tokyo, JP;

Shigeru Unami, Tokyo, JP;

Assignee:

JFE STEEL CORPORATION, Tokyo, JP;

Attorney:

KENJA IP LAW PC

Primary Examiner:

Kelechi C Egwim

Int. Cl.
CPC ...
C08K 3/04 (2006.01); B22F 1/05 (2022.01); B22F 1/052 (2022.01); B22F 1/10 (2022.01); B22F 1/102 (2022.01); B22F 1/103 (2022.01); B22F 1/16 (2022.01); B22F 1/17 (2022.01); B22F 3/08 (2006.01); C08K 3/08 (2006.01); C22C 33/02 (2006.01);
U.S. Cl.
CPC ...
C22C 33/0264 (2013.01); B22F 1/05 (2022.01); B22F 1/052 (2022.01); B22F 1/10 (2022.01); B22F 1/102 (2022.01); B22F 1/103 (2022.01); B22F 1/108 (2022.01); B22F 1/16 (2022.01); B22F 1/17 (2022.01); C08K 3/04 (2013.01); C08K 3/08 (2013.01); B22F 2301/10 (2013.01); B22F 2302/40 (2013.01); B22F 2302/45 (2013.01); B22F 2304/10 (2013.01); C08K 2003/085 (2013.01); C08K 2003/0856 (2013.01); C08K 2201/005 (2013.01);
Abstract

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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