ISOTROPIC ELECTRICAL STEEL SHEET Russian patent published in 2022 - IPC C22C38/06 C22C38/12 C22C38/60 C22C38/08 H01F1/147 H01F1/18 C23C22/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to the field of metallurgy, namely to a sheet of anisotropic electrical steel used as a material for iron cores of transformers. The anisotropic electrical steel sheet comprises a base steel sheet, an amorphous oxide layer formed on the base steel sheet, and a tension insulating coating formed on the amorphous oxide layer. The main steel sheet contains in its chemical composition, wt.%: C: 0.085 or less, Si: 0.80-7.00, Mn: 1.50 or less, acid-soluble Al: 0.065 or less, S: 0.013 or less, Cu: 0-0.80, N: 0-0.012, P: 0-0.50, Ni: 0-1.00, Sn: 0-0.30 and Sb: 0-0.30, the rest - Fe and impurities. The surface gloss Gs20(A) in the direction parallel to the rolling direction and the surface gloss Gs20(B) in the direction perpendicular to the rolling direction are 2.0-70.0.

EFFECT: increased adhesion between the insulating coating and the base steel sheet, as well as reduced magnetic losses.

3 cl, 3 dwg, 5 tbl, 2 ex