ORIENTED ELECTRICAL STEEL SHEET AND STEEL TRANSFORMER CORE, IN WHICH IT IS USED Russian patent published in 2017 - IPC C21D8/12 H01F1/16 

FIELD: metallurgy.

SUBSTANCE: sheet of grain-oriented electrical steel sheet is used subjected to magnetic domain structure refining by creating linear deformations in a direction crossing the rolling direction of the steel sheet, repeatedly, at intervals in the rolling direction, having undulating portions formed by the linear distortions. The deformation lines are wavy areas peaks, and the ratio h/d of average height h to the said wavy areas to the said interval d is from 0.0025 to 0.015.

EFFECT: reduced losses in the iron core of the transformer.

4 cl, 1 dwg, 1 tbl