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Title:
GRAIN-ORIENTED MAGNETIC STEEL SHEET AND PROCESS FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2012/017670
Kind Code:
A1
Abstract:
Provided is a grain-oriented magnetic steel sheet reduced in iron loss by magnetic-domain refinement. When layers of the grain-oriented magnetic steel sheet are stacked and used as a transformer core, etc., the core is inhibited from generating a noise. A grain-oriented magnetic steel sheet having a coating film which has a total length of surface cracks of 20 µm or less per 10,000 µm2 is subjected to magnetic-domain refinement by imposing thermal strain thereon linearly in a direction crossing the rolling direction of the steel sheet, at a given interval along the rolling direction, thereby regulating the warpage of the steel sheet to 3 mm or less per 500 mm of the rolling-direction length.

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Inventors:
SHINGAKI, Yukihiro (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
新垣　之啓 (〒11 東京都千代田区内幸町二丁目２番３号　ＪＦＥスチール株式会社　知的財産部内 Tokyo, 〒1000011, JP)
MAKIISHI, Noriko (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
Application Number:
JP2011/004441
Publication Date:
February 09, 2012
Filing Date:
August 04, 2011
Export Citation:
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Assignee:
JFE STEEL CORPORATION (2-3 Uchisaiwai-cho 2-chome, Chiyoda-ku Tokyo, 11, 〒1000011, JP)
ＪＦＥスチール株式会社 (〒11 東京都千代田区内幸町二丁目２番３号 Tokyo, 〒1000011, JP)
SHINGAKI, Yukihiro (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
新垣　之啓 (〒11 東京都千代田区内幸町二丁目２番３号　ＪＦＥスチール株式会社　知的財産部内 Tokyo, 〒1000011, JP)
International Classes:
C22C38/00; B23K15/00; B23K26/00; C21D8/12; C22C38/04; C22C38/60; H01F1/16
Attorney, Agent or Firm:
SUGIMURA, Kenji (36F Kasumigaseki Common Gate West, 3-2-1 Kasumigaseki, Chiyoda-k, Tokyo 13, 〒1000013, JP)
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Claims:



 
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