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.:
Date of Patent:
Dec. 26, 2023
Filed:
Nov. 13, 2018
Applicant:
Tdk Corporation, Tokyo, JP;
Inventors:
Assignee:
TDK CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01F 1/147 (2006.01); C22C 38/02 (2006.01); H01F 41/02 (2006.01); H01F 3/08 (2006.01); H01F 1/24 (2006.01); C22C 38/00 (2006.01); C22C 38/34 (2006.01); C22C 33/02 (2006.01); B22F 1/16 (2022.01); B22F 1/065 (2022.01); B22F 1/142 (2022.01); B22F 1/148 (2022.01); H01F 1/153 (2006.01);
U.S. Cl.
CPC ...
H01F 1/14766 (2013.01); B22F 1/065 (2022.01); B22F 1/142 (2022.01); B22F 1/148 (2022.01); B22F 1/16 (2022.01); C22C 33/02 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/34 (2013.01); H01F 1/24 (2013.01); H01F 3/08 (2013.01); H01F 41/0246 (2013.01); H01F 1/147 (2013.01); H01F 1/153 (2013.01);
Abstract
A method for producing soft magnetic metal powder includes: a raw material powder preparing step of preparing metal raw material powder having metal raw material particles including iron, silicon, and boron; a mixture step of mixing the metal raw material powder and a carbon source substance and obtaining mixed powder; and a heat treatment step of performing heat treatment on the mixed powder in a non-oxidizing atmosphere containing nitrogen at a heat treatment temperature of 1,250° C. or higher and making the metal raw material particles spherical.