METHOD OF MAKING SHEET FROM TEXTURED ELECTRICAL STEEL AND COLD ROLLING MILL Russian patent published in 2022 - IPC B21B1/28 B21B3/02 C21D8/12 H01F1/147 

FIELD: metallurgy.

SUBSTANCE: invention relates to production of sheet from textured electrical steel. Reheating of steel slab is performed, hot rolling of slab and then several cold rolling with intermediate annealing between each rolling for formation of cold-rolled sheet of final thickness. Performing annealing of cold-rolled sheet primary recrystallization and final annealing, causing secondary recrystallization, after application of annealing separator on steel sheet surface. Final cold rolling during cold rolling of steel sheet to final thickness is performed using tandem rolling mill so that total reduction during rolling is not less than 80 % and at least one of sheet temperatures between stands is within 150–280 °C. Length of line of passage of steel sheet between stands is increased from condition T ≥ 1.3 × L/V, where L is distance between stands, m, V is speed of passage of steel sheet between stands, m/min, T is time of passage of steel sheet between stands, min.

EFFECT: providing interpass aging of steel and obtaining specified magnetic properties of steel sheet.

9 cl, 2 dwg, 4 tbl