Title:
GRAIN-ORIENTED ELECTRICAL STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2013/099258
Kind Code:
A1
Abstract:
The present invention proposes a method that can reduce the noise generated by a transformer core and the like when formed by laminations of a grain-oriented electrical steel sheet in which core loss has been reduced by a magnetic domain refinement process. In this steel sheet, linear distortion extending with an orientation in which an angle formed with a direction perpendicular to the rolling direction of the steel sheet is an angle of 30° or less is periodic in the direction of rolling of the steel sheet, core loss (W17/50) is 0.720 W/kg or less, and magnetic flux density (B8) is 1.930 T. The volume of the closure domain arising in the distortion part is 1.00 - 3.00% of the total magnetic domain volume within the steel sheet.
Inventors:
SUEHIRO RYUICHI (JP)
YAMAGUCHI HIROI (JP)
OKABE SEIJI (JP)
INOUE HIROTAKA (JP)
TAKAJO SHIGEHIRO (JP)
YAMAGUCHI HIROI (JP)
OKABE SEIJI (JP)
INOUE HIROTAKA (JP)
TAKAJO SHIGEHIRO (JP)
Application Number:
PCT/JP2012/008366
Publication Date:
July 04, 2013
Filing Date:
December 27, 2012
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C22C38/00; C21D8/12; C22C38/02; H01F1/16
Domestic Patent References:
| WO2011158519A1 | 2011-12-22 |
Foreign References:
| JP2006144058A | 2006-06-08 | |||
| JPH0483823A | 1992-03-17 | |||
| JP2012036442A | 2012-02-23 | |||
| JP2012057218A | 2012-03-22 | |||
| JP2012031516A | 2012-02-16 | |||
| JPS572252B2 | 1982-01-14 | |||
| JPH0672266B2 | 1994-09-14 |
Other References:
MASAHIRO FUJIKURA ET AL.: "Effect of Laser Irradiation on the Magnetostriction of Grain- Oriented Electrical Steels", JOURNAL OF MAGNETICS SOCIETY OF JAPAN, vol. 25, no. 4-2, 15 April 2001 (2001-04-15), pages 895 - 898, XP008171481
See also references of EP 2799574A4
See also references of EP 2799574A4
Attorney, Agent or Firm:
SUGIMURA, KENJI (JP)
Kenji Sugimura (JP)
Kenji Sugimura (JP)
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