SHEET OF ELECTRICAL STEEL WITH AN ORIENTED GRAIN STRUCTURE, A METHOD FOR MANUFACTURING A SHEET OF ELECTRICAL STEEL WITH AN ORIENTED GRAIN STRUCTURE AND AN ANNEALING SEPARATOR USED FOR MANUFACTURING A SHEET OF ELECTRICAL STEEL WITH AN ORIENTED GRAIN STRUCTURE Russian patent published in 2022 - IPC C21D8/12 C22C38/06 C22C38/60 H01F1/147 H01F1/16 

FIELD: metallurgy.

SUBSTANCE: invention relates to the field of metallurgy, namely to a sheet of electrical steel with an oriented grain structure. A sheet of electrical steel contains a basic steel sheet having a chemical composition containing, wt. %: C: no more than 0.005, Si: 2.5-4.5, Mn: 0.02-0.2, one or more elements selected from a group consisting of S and Se: in total no more than 0.005%, soluble Al: no more than 0.01, N: no more than 0.01, the rest is Fe and impurities, and the primary coating formed on the surface of the main steel sheet and containing Mg₂SiO₄ as the main component. The position of the peak intensity of the Al radiation obtained by performing elemental analysis by optical emission spectrometry of a glow discharge from the surface of the primary coating in the direction of the thickness of a sheet of electrical steel with an oriented grain structure is located within 2.0-12.0 mcm from the surface of the primary coating in the direction of thickness. The numerical density of Al oxides with dimensions of at least 0.2 mcm in diameter of a circle equivalent in area at the peak of the intensity of Al radiation is 0.03-0.2/mcm².

EFFECT: sheet has high magnetic properties and adhesion of the primary coating to the main steel sheet.

5 cl, 7 tbl, 2 ex