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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 10573441 B1

PDFFull Text
Date of Patent:
Feb. 25, 2020

Filed:

Jul. 16, 2015

Method for manufacturing magnetic core

Applicant:

Hitachi Metals, Ltd., Tokyo, JP;

Inventors:

Shin Noguchi, Mishima-gun, JP;

Kazunori Nishimura, Mishima-gun, JP;

Toshio Mihara, Mishima-gun, JP;

Assignee:

HITACHI METALS, LTD., Tokyo, JP;

Attorney:

Sughrue Mion, PLLC

Primary Examiner:

A Dexter Tugbang

Int. Cl.
CPC ...
H01F 1/147 (2006.01); H01F 41/02 (2006.01); B22F 1/00 (2006.01); C22C 38/34 (2006.01); C22C 38/00 (2006.01); H01F 1/24 (2006.01); C22C 38/18 (2006.01); B22F 5/00 (2006.01); C22C 33/02 (2006.01); C22C 38/06 (2006.01); B22F 5/10 (2006.01); B22F 3/24 (2006.01);
U.S. Cl.
CPC ...
H01F 1/147 (2013.01); B22F 1/0003 (2013.01); B22F 3/24 (2013.01); B22F 5/00 (2013.01); B22F 5/10 (2013.01); C22C 33/0257 (2013.01); C22C 38/00 (2013.01); C22C 38/06 (2013.01); C22C 38/18 (2013.01); C22C 38/34 (2013.01); H01F 1/24 (2013.01); H01F 41/0206 (2013.01); H01F 41/0246 (2013.01); H01F 41/0266 (2013.01); B22F 1/0011 (2013.01); B22F 2003/248 (2013.01); B22F 2998/10 (2013.01); Y10T 29/4902 (2015.01); Y10T 29/49069 (2015.01); Y10T 29/49075 (2015.01);
Abstract

There is provided a magnetic core having both high strength and high resistivity, a coil component produced with such a magnetic core, and a magnetic core manufacturing method capable of easily manufacturing a magnetic core with high strength and high resistivity. A method for manufacturing a magnetic core having a structure including dispersed Fe-based soft magnetic alloy particles includes: a first step including mixing a first Fe-based soft magnetic alloy powder containing Al and Cr, a second Fe-based soft magnetic alloy powder containing Cr and Si, and a binder; a second step including pressing the mixture obtained after the first step; and a third step including heat-treating the compact obtained after the second step, wherein the heat treatment forms an oxide layer on the surface of Fe-based soft magnetic alloy particles and bonds the Fe-based soft magnetic alloy particles together through the oxide layer.

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