ELECTROTECHNICAL STEEL SHEET WITH ORIENTED GRAIN STRUCTURE AND PRODUCTION METHOD OF ELECTROTECHNICAL STEEL SHEET WITH ORIENTED GRAIN STRUCTURE Russian patent published in 2020 - IPC C21D8/12 C23C22/00 C21D9/46 H01F1/16 

FIELD: metallurgy.

SUBSTANCE: electrotechnical steel sheet with oriented grain structure contains steel sheet (1), intermediate layer (4) containing Si and O, located on steel sheet, and insulating coating (3) located on intermediate layer (4), wherein intermediate layer (4) contains metal phosphide (5), thickness of intermediate layer (4) is 4 nm or more, and the prevalence of contained metal phosphide (5) in the cross-section of intermediate layer (4) is 1–30 % of the cross-sectional area. Disclosed also is a method of producing electrotechnical steel sheet with oriented grain structure.

EFFECT: high magnetization characteristics and excellent adhesion of the insulating coating.

10 cl, 5 tbl, 4 dwg, 4 ex