Title:
GRAIN-ORIENTED ELECTROMAGNETIC STEEL SHEET AND MANUFACTURING METHOD FOR SAME
Document Type and Number:
WIPO Patent Application WO/2012/001953
Kind Code:
A1
Abstract:
When manufacturing a grain-oriented electromagnetic steel sheet provided with a forsterite film and tension coating on the surface thereof according to the present invention: (1) the Cr content of the grain-oriented electromagnetic steel sheet is restricted to no more than 0.1 mass%; (2) the oxygen coating weight of the forsterite film coating amount is no less than 3.0g/m2, and the thickness of the anchor portion embedded in the base steel portion of the grain-oriented electromagnetic steel sheet is no more than 1.5 μm; and (3) for a test piece with a length of 280mm, when the test piece has the forsterite film on only one surface, the warpage of the steel sheet is at least 10mm, and when the test piece has the forsterite film and tension coating on only the said surface, the warpage of the steel sheet is at least 20mm. Thus, by mitigating iron loss in the grain-oriented electromagnetic steel by controlling magnetic domain structure through laser irradiation, it is possible to obtain a grain-oriented electromagnetic steel sheet with a greater capacity to mitigate iron loss, and also an advantageous method for manufacturing the same.
Inventors:
YAMAGUCHI, Hiroi (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
山口 広 (〒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)
TODA, Hiroaki (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
戸田 広朗 (〒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)
山口 広 (〒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)
TODA, Hiroaki (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
戸田 広朗 (〒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)
Application Number:
JP2011/003685
Publication Date:
January 05, 2012
Filing Date:
June 28, 2011
Export Citation:
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)
YAMAGUCHI, Hiroi (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
山口 広 (〒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)
TODA, Hiroaki (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, 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)
YAMAGUCHI, Hiroi (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
山口 広 (〒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)
TODA, Hiroaki (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
International Classes:
C22C38/00; B21B3/02; C21D8/12; C21D9/46; C22C38/18; C22C38/60; C23C22/00; H01F1/16; H01F1/18
Attorney, Agent or Firm:
SUGIMURA, Kenji (36F Kasumigaseki Common Gate West, 3-2-1 Kasumigaseki, Chiyoda-k, Tokyo 13, 〒1000013, JP)
Claims:
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