ELECTRICAL ANISOTROPIC STEEL SHEET Russian patent published in 2021 - IPC C21D8/12 H01F1/147 B23K26/364 C22C38/00 C22C38/60 

FIELD: electrical anisotropic steel.

SUBSTANCE: invention relates to a sheet of electrical anisotropic steel. The sheet has a surface made with grooves, while on the surface of the steel sheet in the region from a to b and/or in the region from a' from b', extending outward in the direction along the width of the groove and from the end along the width of the part of the groove, along the longitudinal direction the groove is a protrusion. The average height of the protrusion is from more than 5 microns to 10 microns, while the section of the protrusion in the longitudinal direction of the groove and in the direction normal to the surface of the steel sheet is made in the form of a line, the profile of which contains separate parts between the peak points, with each specified individual part with a length (LP1, LP2, LP3, LP5) has a height of 50% or more of the height of each peak point (P1, P2, P3, P5) on the profile line of the protrusion, and the total length Lsum = (LP1 + LP2 + LP3 + LP5) of these individual parts is 30% or more of the total length L of the projection.

EFFECT: reduction of magnetic losses of a metal core made of sheet.

1 cl, 4 dwg