Title:
ORIENTATED ELECTROMAGNETIC STEEL SHEET AND MANUFACTURING METHOD FOR SAME
Document Type and Number:
WIPO Patent Application WO/2012/014290
Kind Code:
A1
Abstract:
Cold roll a silicon steel sheet (1) containing Si. Then, bring about primary re-crystallisation by decarburisation annealing (3) the silicon steel sheet (1). Then, roll up the silicon steel sheet (1) and obtain a steel sheet coil (31). Then, bring about secondary re-crystallisation by annealing (6) the steel sheet coil (31) by means of batch processing. Then, unroll and flatten the steel sheet coil (31). In between the step wherein cold rolling is carried out and the step wherein the steel sheet coil (31) is obtained, irradiate (2) a laser beam, a plurality of times and at prescribed intervals, on the surface of the silicon steel sheet (1) from one end to the other end thereof in the sheet width direction. When the secondary re-crystallisation is brought about, crystal grain boundaries are generated which pass through the front and rear of the silicon steel sheet (1) along the trajectory of the laser beam.
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Inventors:
SAKAI, Tatsuhiko (6-1 MARUNOUCHI 2-CHOME, CHIYODA-K, Tokyo 71, 〒1008071, JP)
坂井 辰彦 (〒71 東京都千代田区丸の内二丁目６番１号 新日本製鐵株式会社内 Tokyo, 〒1008071, JP)
HIRANO, Koji (6-1 MARUNOUCHI 2-CHOME, CHIYODA-K, Tokyo 71, 〒1008071, JP)
平野 弘二 (〒71 東京都千代田区丸の内二丁目６番１号 新日本製鐵株式会社内 Tokyo, 〒1008071, JP)
坂井 辰彦 (〒71 東京都千代田区丸の内二丁目６番１号 新日本製鐵株式会社内 Tokyo, 〒1008071, JP)
HIRANO, Koji (6-1 MARUNOUCHI 2-CHOME, CHIYODA-K, Tokyo 71, 〒1008071, JP)
平野 弘二 (〒71 東京都千代田区丸の内二丁目６番１号 新日本製鐵株式会社内 Tokyo, 〒1008071, JP)
Application Number:
JP2010/062679
Publication Date:
February 02, 2012
Filing Date:
July 28, 2010
Export Citation:
Assignee:
NIPPON STEEL CORPORATION (6-1 MARUNOUCHI 2-CHOME, CHIYODA-KU Tokyo, 71, 〒1008071, JP)
新日本製鐵株式会社 (〒71 東京都千代田区丸の内二丁目６番１号 Tokyo, 〒1008071, JP)
SAKAI, Tatsuhiko (6-1 MARUNOUCHI 2-CHOME, CHIYODA-K, Tokyo 71, 〒1008071, JP)
坂井 辰彦 (〒71 東京都千代田区丸の内二丁目６番１号 新日本製鐵株式会社内 Tokyo, 〒1008071, JP)
HIRANO, Koji (6-1 MARUNOUCHI 2-CHOME, CHIYODA-K, Tokyo 71, 〒1008071, JP)
新日本製鐵株式会社 (〒71 東京都千代田区丸の内二丁目６番１号 Tokyo, 〒1008071, JP)
SAKAI, Tatsuhiko (6-1 MARUNOUCHI 2-CHOME, CHIYODA-K, Tokyo 71, 〒1008071, JP)
坂井 辰彦 (〒71 東京都千代田区丸の内二丁目６番１号 新日本製鐵株式会社内 Tokyo, 〒1008071, JP)
HIRANO, Koji (6-1 MARUNOUCHI 2-CHOME, CHIYODA-K, Tokyo 71, 〒1008071, JP)
International Classes:
C21D9/46; C21D8/12; C22C38/00; H01F1/16
Attorney, Agent or Firm:
KOKUBUN, Takayoshi (5th Floor, NBF Ikebukuro City Building 17-8, Higashi-Ikebukuro 1-chome, Toshima-k, Tokyo 13, 〒1700013, JP)
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Claims:
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