Patent ID: 6602357
Filing Date: 2003-08-05
Classification: C21D,C22C,H01F

Abstract:
A grain oriented electrical steel sheet with low iron loss, comprising:a metal part comprising Si: about 2.5 to about 5.0 mass % and Cr: about 0.05 to about 1.0 mass %, an insulation coating formed on a surface of the metal part and made of one or more layers, and a plurality of induced linear strains at the surface of said steel sheet, including the metal part, which linearly extend at an angle not larger than about 45Â° relative to the direction perpendicular to the rolling direction, wherein magnetic flux density B8 (T) satisfies formula (1) and an array interval D (mm) of said linear strains satisfies formula (2): B8&gE;(2.21âˆ’0.0604(Si)âˆ’0.0294(Cr))Ã—0.960â€ƒâ€ƒ(1) 3+5(Cr)&lE;D&lE;11+5(Cr)â€ƒâ€ƒ(2), and wherein (Si) and (Cr) represent mass percentages of Si and Cr in the metal part.