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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 11545286 B1

PDFFull Text
Date of Patent:
Jan. 03, 2023

Filed:

Aug. 06, 2018

Crystalline fe-based alloy powder and method for producing same

Applicant:

Hitachi Metals, Ltd., Tokyo, JP;

Inventors:

Tetsuro Kato, Tokyo, JP;

Nobuhiko Chiwata, Tokyo, JP;

Motoki Ohta, Tokyo, JP;

Shin Noguchi, Tokyo, JP;

Shuji Yamanaka, Tokyo, JP;

Assignee:

HITACHI METALS, LTD., Tokyo, JP;

Attorney:

Westman, Champlin & Koehler, P.A.

Primary Examiner:

Seth Dumbris

Int. Cl.
CPC ...
B22F 1/02 (2006.01); H01F 1/153 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/20 (2006.01); C22C 38/22 (2006.01); C22C 38/26 (2006.01); B22F 1/16 (2022.01); B22F 1/052 (2022.01);
U.S. Cl.
CPC ...
H01F 1/15333 (2013.01); B22F 1/052 (2022.01); B22F 1/16 (2022.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/20 (2013.01); C22C 38/22 (2013.01); C22C 38/26 (2013.01); H01F 1/1535 (2013.01); B22F 2301/35 (2013.01); B22F 2304/10 (2013.01); C22C 2200/04 (2013.01); C22C 2202/02 (2013.01);
Abstract

A crystalline Fe-based alloy powder composed of Fe-based alloy particles containing, within a structure thereof, nanocrystal grains having an average grain size of 30 nm or less, and in which d50, which is a particle diameter corresponding to a cumulative frequency of 50% by volume, is from 3.5 μm to 35.0 μm in a cumulative distribution curve that is obtained by laser diffractometry and that shows the relationship between the particle diameter and the cumulative frequency from the small particle diameter side, and a ratio of Fe-based alloy particles having a particle diameter of 2 μm or less to the total of the Fe-based alloy particles, which is determined by laser diffractometry, is from 0% by volume to 8% by volume.

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