Title:
METHOD FOR PRODUCING ORIENTED ELECTRICAL STEEL SHEETS
Document Type and Number:
WIPO Patent Application WO/2011/111862
Kind Code:
A1
Abstract:
Disclosed is a method for producing oriented electrical steel sheets which contain, by mass percent, C: 0.01-0.10%, Si: 2.5-4.5%, Mn: 0.02-0.12%, Al: 0.005-0.10%, N: 0.004-0.015%, and which further contain Se: 0.005-0.06% and/or S: 0.005-0.06%. In the method, the steel sheet temperature of the full length of coil during cooling after the finish rolling part of hot rolling fulfills T(t) < FDT-(FDT-700) × t / 6 (wherein T(t): steel sheet temperature (degrees Celsius); FDT: end temperature of finish rolling (degrees Celsius); t: time elapsed from the end of finish rolling (seconds)). By means of controlling the steel sheet temperature three seconds after completion of hot rolling to be 650C or greater in the forwardmost 10% of the coil length, an oriented electrical steel sheet with excellent magnetic properties can be obtained across the entire coil length.
Inventors:
SADAHIRO, Kenichi (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
Application Number:
JP2011/056127
Publication Date:
September 15, 2011
Filing Date:
March 09, 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)
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)
International Classes:
C21D8/12; B21B3/02; C22C38/00; C22C38/60; H01F1/16
Attorney, Agent or Firm:
OCHIAI, Kenichiro (JFE Techno-Research Corporation 7th Floor, Yanagiya Building, 1-10, Nihonbashi 2-chome, Chuo-k, Tokyo 27, 〒1030027, JP)
Claims:
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