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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 12749602 B1

PDFFull Text
Date of Patent:
Sep. 29, 2026

Filed:

Feb. 10, 2022

Iron-chromium-cobalt alloy magnet and method for producing same

Applicant:

Proterial, Ltd., Tokyo, JP;

Inventors:

Shinya Okamoto, Tokyo, JP;

Atsuhiko Onuma, Tokyo, JP;

Nobuyuki Okamura, Gunma, JP;

Kousuke Kuwabara, Tokyo, JP;

Shunya Adachi, Tokyo, JP;

Masahiro Sato, Tokyo, JP;

Takahiro Ishii, Gunma, JP;

Assignee:

Proterial, Ltd., Tokyo, JP;

Attorney:

JCIPRNET

Primary Examiner:

Anthony M Liang

Int. Cl.
CPC ...
H01F 1/055 (2006.01); B22F 9/08 (2006.01); B22F 10/28 (2021.01); B22F 10/64 (2021.01); B33Y 10/00 (2015.01); B33Y 40/20 (2020.01); B33Y 80/00 (2015.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/28 (2006.01); C22C 38/30 (2006.01);
U.S. Cl.
CPC ...
H01F 1/055 (2013.01); B22F 9/082 (2013.01); B22F 10/28 (2021.01); B22F 10/64 (2021.01); B33Y 10/00 (2014.12); B33Y 40/20 (2020.01); B33Y 80/00 (2014.12); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/28 (2013.01); C22C 38/30 (2013.01); B22F 2009/0824 (2013.01); B22F 2304/10 (2013.01); B22F 2998/10 (2013.01); B22F 2999/00 (2013.01); C22C 2202/02 (2013.01);
Abstract

The purpose of the present invention is to provide: an iron-chromium-cobalt alloy magnet having improved magnetic characteristics, especially maximum energy product; and a method for producing the same. Provided is an iron-chromium-cobalt alloy magnet, wherein: the iron-chromium-cobalt alloy magnet includes titanium; the number density of Ti-enriched phases having a maximum diameter of 3 μm or greater in a cross-section is, on average, less than 1.0 per 10,000 μm; and the squareness ratio represented by (BH)ma×/(Br×HcB) exceeds 0.72.

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