Title:
METHOD OF PRODUCING DOUBLE ORIENTED SILICON STEEL SHEET
Document Type and Number:
Japanese Patent JP3870625
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a double oriented silicon steel sheet having good magnetic properties and reduced variations.
SOLUTION: This method of producing a double oriented silicon steel sheet includes a process in which steel containing, by mass, 0.02 to 0.20% C, 2.4 to 4.0% Si and 0.20 to 2.0% Mn is subjected to hot rolling, is next subjected to cold rolling under the condition is which the ratio between the diameter D of a work roll and the thickness(t) of the steel sheet in the process of the cold rolling (D/t) satisfies the relation of D/t≥80 or D/t≥100/t and is then subjected to annealing in an (α+γ) two-phase region under the reduced pressure with a separation material for annealing interposed between the steel sheets.
Inventors:
Naoyuki Sano
Toshiro Tomita
Shigeo Uenoya
Yutaka Kanzaki
Toshiro Tomita
Shigeo Uenoya
Yutaka Kanzaki
Application Number:
JP27315399A
Publication Date:
January 24, 2007
Filing Date:
September 27, 1999
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES,LTD.
International Classes:
C21D8/12; H01F1/16; C21D9/46; C22C38/00; C22C38/04; (IPC1-7): C21D9/46; C21D8/12; H01F1/16; //C22C38/00; C22C38/04
Domestic Patent References:
| JP7074387B2 | ||||
| JP63145716A | ||||
| JP11012654A | ||||
| JP7033545B2 |
Foreign References:
| WO1998020179A1 |
Attorney, Agent or Firm:
Shoichi Hirose
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