METHOD FOR PRODUCTION OF LOW-ALLOY COLD-RESISTANT SHEET METAL Russian patent published in 2019 - IPC C21D8/02 C22C38/12 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, in particular to production of rolled sheet for use in critical parts of cars, agricultural equipment, crane building, etc., steel can be used in building structures in conditions of Siberia and Extreme North. Method comprises melting steel containing, wt%: C 0.05–0.08, Si 0.2–0.35, Mn 1.1–1.50, V 0.05–0.1, Ti 0.01–0.03, S is not more than 0.015, P is not more than 0.015, Al 0.01–0.025, N 0.01–0.02, Ca not more than 0.02, Fe – balance and unavoidable impurities, including arsenic, lead, zinc, tin, content of which is not more than As 0.01, Pb 0.001, Zn 0.005, Sn 0.08, with carbon equivalent Ce≤0.35, fracture resistance coefficient Pcm≤0.25, steel casting, billet heating for rolling to temperature 1,200–1,250°C, end of rolling at temperature 850–880 °C, coiling at temperature of 600–550 °C, cooling in air.

EFFECT: high plasticity, cold resistance, deformability and weldability.

1 cl, 2 tbl