GRAIN-ORIENTED ELECTRICAL STEEL SHEET, AND METHOD FOR PRODUCING SAME

WIPO Patent Application WO/2012/017669

A1

Provided is a grain-oriented electrical steel sheet having a low core loss and subjected to magnetic domain segmentation treatment in which iron loss factors are eliminated. A grain-oriented electrical steel sheet having a forsterite coating film on the surface of the steel sheet, a Se-concentrated part within the aforementioned coating film and/or on the boundary of the aforementioned coating film and the steel sheet, and a concentration of the aforementioned concentrated part of 2% or more by area ratio per 10000 µm2 of the surface of the steel sheet is subjected to magnetic domain segmentation treatment by means of electron beam irradiation.

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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)

JP2011/004440

February 09, 2012

August 04, 2011

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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)

C22C38/00; B21B3/02; C21D8/12; C21D9/46; C23C22/00; H01F1/16; H01F1/18; C22C38/60

SUGIMURA, Kenji (36F Kasumigaseki Common Gate West, 3-2-1 Kasumigaseki, Chiyoda-k, Tokyo 13, 〒1000013, JP)

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