METHOD OF TEXTURIZED ELECTRIC STEEL SHEET PRODUCTION AND PRIMARY RECRYSTALLIZED STEEL SHEET FOR PRODUCTION OF TEXTURIZED ELECTRIC STEEL SHEET Russian patent published in 2017 - IPC C21D8/12 H01F1/16 C22C38/60 

FIELD: agriculture.

SUBSTANCE: invention relates to production of texturized electric steel sheet. To improve steel magnetic properties of optionally performed annealing, steel slab hot rolling, containing, in wt% or ppm. at wt: C 0.08 % or less, Si from 2.0 % to 4.5 % and Mn 0.5 % or less, S, Se and O are each limited by less than 50 ppm., sol. Al less than 100 ppm., and N, content of which satisfies condition sol. Al/(26.98/14.00) ppm. ≤ N ≤ 80 ppm., rest is Fe and incidental impurities. Performing hot-rolled sheet annealing and cold rolling, then, performing cold-rolled sheet nitration, with increasing nitrogen content by value from 50 ppm. or more to 1,000 ppm. or less during primary recrystallization annealing or after it, applying annealing separator onto cold-rolled sheet, wherein holding time in temperature range from 300 °C to 800 °C at heating stage during secondary recrystallization annealing is set equal to 5 hours or more to 150 hours or less to provide for silicon nitride (Si₃N₄) extraction on grains borders and its use as grains normal growth inhibitor.

EFFECT: normal growth of grains.

5 cl, 2 tbl, 2 ex, 2 dwg