ANISOTROPIC ELECTRICAL STEEL SHEET Russian patent published in 2022 - IPC C21D8/12 C22C38/06 C22C38/08 C22C38/16 C22C38/18 C22C38/20 C22C38/40 C22C38/42 C22C38/60 H01F1/16 H01F1/18 H01F1/147 

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. A sheet of anisotropic electrical steel contains a main steel sheet and an insulating coating, between which there is no forsterite film. The main steel sheet has a chemical composition containing, wt. %: 0.085 or less C, 0.80-7.00 Si, 0.05-1.00 Mn, 0.065 or less acid-soluble Al, 0.003 or less S, 0.0040 or less N, 0.0005-0.0080 B, 0-0.50 P, 0-1.00 Ni, 0-0.30 Sn, 0-0.30 Sb, 0-0.40 Cu, 0-0.30 Cr, 0-0.01 Bi, the rest is Fe and impurities. When considering a cross section perpendicular to the direction of rolling of the main steel sheet, when the observation area is an area with a length of 10 mcm from the surface of the main steel sheet into the main steel sheet in the direction of the thickness of the main steel sheet and a length of 20 mm in the direction perpendicular to the direction of the thickness of the sheet, there are no needle inclusions in this observation area having a length of 1 mcm or more.

EFFECT: reduction of magnetic losses is provided.

2 cl, 4 dwg, 5 tbl, 2 ex