METHOD NON-TEXTURED ELECTROTECHNICAL STEEL SHEETS PRODUCTION Russian patent published in 2018 - IPC C21D8/12 C22C38/00 H01F1/16 

FIELD: metallurgy.

SUBSTANCE: invention relates to the field of metallurgy. In the non-oriented electrical steel sheet manufacturing by the hot rolling of a steel slab containing, in wt. %: C not more than 0.005, Si not more than 8.0, Mn 0.03–3.0, P not more than 0.2, S not more than 0.005, Al not more than 3.0, N not more than 0.005, Ni not more than 3, Cr not more than 5, Ti not more than 0.005, Nb not more than 0.003, As not more than 0.005 and O is not more than 0.005, with single cold rolling or double or multiple cold rolling, with intermediate annealing between them after annealing in the hot zone or without annealing in the hot zone, and carrying out the final annealing, the average heating rate from 600 °C to 700 °C during the heating process with the final annealing is set to not less than 50 °C/s.

EFFECT: enabling high magnetic flux density by changing and improving the structure in the steel sheet.

16 cl, 3 tbl, 4 dwg