ELECTRICAL STEEL SHEET WITH ORIENTED GRAIN STRUCTURE AND ITS PRODUCTION METHOD Russian patent published in 2021 - IPC C21D8/12 B23K26/364 

FIELD: electrical engineering.

SUBSTANCE: group of inventions relates to an electric steel sheet with oriented grain structure and its production method. The mentioned electrical steel sheet has a main steel sheet provided with grooves and a glass membrane formed on its surface. The angle formed by the longitudinal direction of the groove with the direction orthogonal to the rolling direction and the direction of the thickness of the main steel sheet is 0-40º, the width of the groove is 20-300 mcm, the depth of the groove is 10-40 mcm, and the intervals of the grooves in the rolling direction are 2-30 mm. In the area including the grooves, in a cross-section orthogonal to the longitudinal direction of the groove, a straight line passing through the peak point and parallel to the direction of the width of the groove orthogonal to the direction of the thickness of the sheet in the mentioned section is defined as a reference line. The point on the boundary line between the glass membrane and the main steel sheet, located at the lowest point in the direction of the sheet thickness, is defined as the deepest point. The point on the boundary line located at the highest point in the direction of the thickness of the sheet in the area which center is the mentioned deepest point, having a length of 2 mcm in the direction of the width of the groove, is defined as a shallow point. The ratio between the shortest distance A between the reference line and the deepest point and the shortest distance B between the reference line and the mentioned shallow point satisfies the expression 0.1 mcm ≤ A – B ≤ 5.0 mcm.

EFFECT: invention provides an electrical steel sheet with an oriented grain structure with low losses in steel and low magnetostriction.

3 cl, 3 dwg, 3 tbl, 3 ex