METHOD FOR PRODUCTION OF CONTINUOUSLY ANNEALED AGELESS COLD-ROLLED STOCK OF ULTRA DEEP DRAWING Russian patent published in 2016 - IPC C21D8/04 C22C38/50 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy. To improve plastic characteristics of rolled stock, method includes smelting steel containing, wt%: C 0.005 or less, Si 0.02 or less, Mn 0.20 or less, S 0.012 or less, P 0.012 or less, Al 0.06 or less, N 0.006 or less, Ti 0.04-0.080, ratio of content of elements is determined by formula Ti=(5xC+3xS+4xN)±0.02, Fe and inevitable admixtures - balance, which is poured into slab. Slab is subjected to hot rolling at rolling beginning temperature 1,020÷1,080 °C and end temperature - 860÷920 °C, then performing accelerated cooling of rolled stock at collecting roller table to temperature of 670÷710 °C, then strip is cold rolled with reduction 60÷92 %, high-speed continuous annealing at temperature of 820÷860 °C, ensuring production of ferrite grain size of 22÷41 mcm, with further accelerated cooling and artificial ageing.

EFFECT: improved plastic characteristics of rolled stock.

1 cl, 6 tbl