METHOD OF PRODUCTION OF STEEL SUBSTRATE SUBJECTED TO REDUCTION ANNEALING WITH COATING FOR PACKAGING APPLICATIONS AND PRODUCT FROM PACKING STEEL PRODUCED WITH IT Russian patent published in 2017 - IPC C21D8/02 B21B1/28 C25D5/50 C21D9/60 

FIELD: metallurgy.

SUBSTANCE: method includes production of steel slab containing, wt %: C 0.05 or less, N 0.004 or less, Mn 0.05 to 0.5, P 0.02 or less, Si 0.02 or less, s 0.03 or less, Al 0.1 or less, if necessary, one or more elements from: Nb from 0.001 to 0.1, Ti from 0.001 to 0.15, V from 0.001 to 0.2, Zr from 0.001 to 0.1, B from 5 to 50 ppm, Fe and unavoidable impurities-the rest, hot rolling at final temperature, more or equal to the Ar₃ transformation temperature, a single cold rolling to produce a substrate, electrodeposition of tin layer on one or both substrate sides to produce tinned steel sheet for packaging applications. The coating weight of tin layer or layers is not more than 1000 mg/m², annealing of the tinned packaging steel sheet by heating thereof at a rate of more than 300°C/s to temperature T_A from 513°C to 645°C with holding for a time t_A with conversion of tin layer into layer of iron-tin alloy, containing at least 90, preferably 95 wt % FeSn with 50 at % Fe and 50 at % Sn, and cooling at rate of at least 100°C/c.

EFFECT: improvement of steel sheet corrosion resistance.

12 cl, 3 tbl