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 9721706 B1

PDFFull Text
Date of Patent:
Aug. 01, 2017

Filed:

Aug. 17, 2012

Non-oriented electrical steel sheet, manufacturing method thereof, laminate for motor iron core, and manufacturing method thereof

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:

Jessee Roe

Assistant Examiner:

Christopher Kessler

Int. Cl.
CPC ...
H01F 1/01 (2006.01); H01F 1/04 (2006.01); B32B 15/01 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/16 (2006.01); C21D 8/12 (2006.01); H01F 41/02 (2006.01); C22C 1/02 (2006.01); H01F 1/16 (2006.01);
U.S. Cl.
CPC ...
H01F 1/04 (2013.01); B32B 15/011 (2013.01); C21D 8/1233 (2013.01); C21D 8/1272 (2013.01); C22C 1/02 (2013.01); C22C 38/004 (2013.01); C22C 38/008 (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); C22C 38/16 (2013.01); H01F 1/16 (2013.01); H01F 41/0233 (2013.01); C21D 2211/004 (2013.01); Y10T 428/12965 (2015.01);
Abstract

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, when contents of Ti, V, Zr, Nb, and C (mass %) are represented as [Ti], [V], [Zr], [Nb], and [C] respectively. A matrix of a metal structure is a ferrite phase, and the metal structure does not contain a non-recrystallized structure. An average grain size of ferrite grains constituting the ferrite phase is not less than 30 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 1 particle/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.

Find Patent Forward Citations

Loading…