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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 9512500 B1

PDFFull Text
Date of Patent:
Dec. 06, 2016

Filed:

Aug. 16, 2012

Non-oriented electrical steel sheet, method of manufacturing the same, laminate for motor iron core, and method of manufacturing the same

Applicants:

Masahiro Fujikura, Tokyo, JP;

Yoshiyuki Ushigami, Tokyo, JP;

Tesshu Murakawa, Tokyo, JP;

Shinichi Kanao, Tokyo, JP;

Makoto Atake, Tokyo, JP;

Takeru Ichie, Tokyo, JP;

Kojiro Hori, Tokyo, JP;

Shinichi Matsui, Tokyo, JP;

Inventors:

Masahiro Fujikura, Tokyo, JP;

Yoshiyuki Ushigami, Tokyo, JP;

Tesshu Murakawa, Tokyo, JP;

Shinichi Kanao, Tokyo, JP;

Makoto Atake, Tokyo, JP;

Takeru Ichie, Tokyo, JP;

Kojiro Hori, Tokyo, JP;

Shinichi Matsui, Tokyo, JP;

Assignee:

NIPPON STEEL & SUMITOMO METAL CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Deborah Yee

Int. Cl.
CPC ...
C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/14 (2006.01); C21D 8/12 (2006.01); H01F 1/16 (2006.01); B32B 15/00 (2006.01); C21D 8/00 (2006.01); C22C 38/12 (2006.01); B32B 15/01 (2006.01); C21D 9/46 (2006.01); H01F 3/08 (2006.01);
U.S. Cl.
CPC ...
C21D 8/005 (2013.01); B32B 15/011 (2013.01); C21D 8/12 (2013.01); C21D 8/1244 (2013.01); C21D 8/1272 (2013.01); C21D 9/46 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/12 (2013.01); C22C 38/14 (2013.01); H01F 1/16 (2013.01); C21D 2201/05 (2013.01); C21D 2211/004 (2013.01); C21D 2211/005 (2013.01); H01F 3/08 (2013.01); Y10T 428/12965 (2015.01);
Abstract

When contents of Ti, V, Zr, Nb, and C (mass %) are represented as [Ti], [V], [Zr], [Nb], and [C] respectively, a value of a parameter Q represented by 'Q=([Ti]/48+[V]/51+[Zr]/91+[Nb]/93)/([C]/12)' is not less than 0.9 nor more than 1.1. A matrix of a metal structure is a ferrite phase, and the metal structure does not include a non-recrystallized structure. An average grain size of ferrite grains constituting the ferrite phase is not less than 10 μm nor more than 200 μm. A precipitate containing at least one selected from the group consisting of Ti, V, Zr, and Nb exists with a density of 10 μmor more in the ferrite grain. An average grain size of the precipitate is not less than 0.002 μm nor more than 0.2 μm.

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