Title:
PROCESS FOR PRODUCING NON-ORIENTED ELECTRICAL STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2013/080891
Kind Code:
A1
Abstract:
According to this process, a non-oriented electrical steel sheet which exhibits excellent magnetic characteristics in the direction of cold rolling is obtained by: subjecting a steel slab which contains up to 0.005 mass% of C, 2 to 7 mass% of Si, 0.03 to 3 mass% of Mn, up to 0.01 mass% of Al, up to 0.005 mass% of N and up to 0.005 mass% of S, and further contains Ca in an amount of 0.0005 to 0.01 mass% and at a Ca/S atomic ratio, (Ca(mass%)/40)/(S(mass%)/32), of 0.5 to 3.5 with the balance being Fe and unavoidable impurities to hot rolling, hot band annealing, and cold rolling successively; subjecting the obtained sheet to recrystallization annealing to adjust the grain diameters (d) to 70μm or less; and then subjecting the resulting sheet to skin-pass rolling with a rolling reduction of 1 to 15% and then stress relief annealing.
Inventors:
ZAIZEN YOSHIAKI (JP)
ODA YOSHIHIKO (JP)
TODA HIROAKI (JP)
ODA YOSHIHIKO (JP)
TODA HIROAKI (JP)
Application Number:
PCT/JP2012/080358
Publication Date:
June 06, 2013
Filing Date:
November 22, 2012
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21D8/12; B21B3/02; C22C38/00; C22C38/06; C22C38/60; H01F1/16
Foreign References:
| JP2001158949A | 2001-06-12 | |||
| JPH03126845A | 1991-05-30 | |||
| JP2008050686A | 2008-03-06 | |||
| JP2012140676A | 2012-07-26 |
Attorney, Agent or Firm:
GINZA MARONIE P. C. (JP)
Patent business corporation Ginza horse chestnut patent firm (JP)
Patent business corporation Ginza horse chestnut patent firm (JP)
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