logo

For the Inventor, By the Inventor

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 12378652 B1

PDFFull Text
Date of Patent:
Aug. 05, 2025

Filed:

Jan. 11, 2024

Fe-based amorphous alloy ribbon, production method thereof, iron core, and transformer

Applicant:

Proterial, Ltd., Tokyo, JP;

Inventors:

Hajime Itagaki, Tokyo, JP;

Morifumi Kuroki, Tokyo, JP;

Makoto Sasaki, Tokyo, JP;

Shin Nakajima, Tokyo, JP;

Assignee:

PROTERIAL, LTD., Tokyo, JP;

Attorney:

Meunier Carlin & Curfman LLC

Primary Examiner:

Brian D Walck

Assistant Examiner:

Nazmun Nahar Shams

Int. Cl.
CPC ...
C22C 45/00 (2023.01); B23K 26/362 (2014.01); C21D 8/12 (2006.01); C22C 45/02 (2006.01); H01F 1/153 (2006.01); H01F 27/25 (2006.01); H01F 27/255 (2006.01); H01F 30/10 (2006.01); H01F 30/12 (2006.01);
U.S. Cl.
CPC ...
C22C 45/008 (2013.01); B23K 26/362 (2013.01); C21D 8/1294 (2013.01); C22C 45/02 (2013.01); H01F 1/15308 (2013.01); H01F 27/25 (2013.01); H01F 27/255 (2013.01); H01F 30/10 (2013.01); H01F 30/12 (2013.01);
Abstract

An Fe-based amorphous alloy ribbon reduced in iron loss, less deformed, and highly productive in a condition of a magnetic flux density of 1.45 T is provided. One aspect of the present disclosure provides an Fe-based amorphous alloy ribbon having first and second surfaces, and is provided with continuous linear laser irradiation marks on at least the first surface. Each linear laser irradiation mark is formed along a direction orthogonal to a casting direction of the Fe-based amorphous alloy ribbon, and has unevenness on its surface. When the unevenness is evaluated in the casting direction, a height difference HL×width WA calculated from the height difference HL between a highest point and a lowest point in a thickness direction of the Fe-based amorphous alloy ribbon and the width WA which is a length of the linear irradiation mark on the first surface is 6.0 to 180 μm.

Find Patent Forward Citations

Loading…