FIELD: metallurgy.
SUBSTANCE: method includes etching of hot-rolled flat work and its subsequent cold rolling on continuous rolling mill. Increasing of strip mechanical properties is provided ensured by blank made of "ст." 3 "пс" of thickness 2 mm, rolled for finite thickness 0.5 mm, after etching is subject to prefiring in single-stack bell-type furnace with protective nitrogen-hydrogen gas and with charge volume till 60 t while heating during 34 hours with the temperature of final tenacity 650°C, and after annealing it is implemented cold rolling. In the capacity of protective gas it is used mixture of 93...96% nitrogen and 4...7% hydrogen.
EFFECT: increasing of steel strip consumer properties.
2 cl, 1 ex
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