Grain-oriented electrical steel sheet excellent in magnetic char

Details Grain-oriented electrical steel sheet excellent in magnetic char Grain-oriented electrical steel sheet excellent in magnetic char

1998-07-16

2000-08-29

Yee, Deborah

Metal treatment

Stock

Magnetic

148111, 148112, C21D 812, C22C 3802

Patent

active

061102989

ABSTRACT:
Grain-oriented electrical steel sheet having excellent magnetic characteristics in which shearing angles of grain directions [001] of secondary recrystallized grains from a rolling direction have an average value of about 4.degree. or less, wherein the area % of secondary recrystallized grains having a length of about 60 mm or more in the rolling-orthogonal direction is about 85% or more; with respect to recrystallized micro grains, the area % of crystal grains having a grain diameter of 2 to 20 mm is about 0.2% or more and about 10% or less; and the average value of angles formed with the steel sheet surface by grain directions [001] is about 1.5.degree. or more and about 5.0.degree. or less; in a grain-oriented electrical steel sheet of a high magnetic flux density (B.sub.8 .gtoreq.1.96 T) low iron loss is achieved without providing magnetic domain-refining treatment, very low iron loss value by forming grooves on the steel sheet surface, smoothening the steel sheet surface or a combination thereof.

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