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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 10546674 B1

PDFFull Text
Date of Patent:
Jan. 28, 2020

Filed:

Nov. 19, 2015

Fe-based soft magnetic alloy ribbon and magnetic core comprising same

Applicant:

Hitachi Metals, Ltd., Tokyo, JP;

Inventor:

Yoshihito Yoshizawa, Yasugi, JP;

Assignee:

HITACHI METALS, LTD., Tokyo, JP;

Attorney:

Studebaker & Brackett PC

Primary Examiner:

Kevin M Bernatz

Int. Cl.
CPC ...
H01F 1/153 (2006.01); C22C 45/02 (2006.01); H01F 1/16 (2006.01); C22C 38/00 (2006.01); C21D 1/04 (2006.01); C21D 6/00 (2006.01); C21D 8/02 (2006.01); C21D 8/12 (2006.01); C21D 9/52 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/10 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/16 (2006.01); H01F 38/20 (2006.01);
U.S. Cl.
CPC ...
H01F 1/15308 (2013.01); C21D 1/04 (2013.01); C21D 6/001 (2013.01); C21D 6/007 (2013.01); C21D 6/008 (2013.01); C21D 8/0205 (2013.01); C21D 8/0263 (2013.01); C21D 8/1261 (2013.01); C21D 9/52 (2013.01); C22C 38/00 (2013.01); C22C 38/002 (2013.01); C22C 38/008 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/105 (2013.01); C22C 38/12 (2013.01); C22C 38/14 (2013.01); C22C 38/16 (2013.01); C22C 45/02 (2013.01); H01F 1/16 (2013.01); C21D 6/00 (2013.01); C22C 2202/02 (2013.01); H01F 38/20 (2013.01);
Abstract

Conventional Fe-based soft magnetic alloy ribbons each containing Co and Ni have a problem that magnetic anisotropy that is neatly arranged in one direction cannot be induced easily even by a magnetic field annealing treatment and, therefore, a wound magnetic cores, a problem that a residual magnetic flux density Br is high, a problem that the hysteresis of the B—H curve becomes large (coercivity Hc becomes large), a problem that the change in incremental permeability relative to superimposed magnetic field becomes large, and others. In order to solve the problems, provided is an Fe-based soft magnetic alloy ribbon including a Cu-concentrated region present directly below a surface of the ribbon, and a Co-concentrated region present directly below the Cu-concentrated region. Also provided is a magnetic core including the Fe-based soft magnetic alloy ribbon.

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