METHOD OF PRODUCING LOW-ALLOYED CORROSION-RESISTANT STEEL FOR PRODUCING ROLLED STOCK Russian patent published in 2017 - IPC C21D8/02 C22C38/12 C21C5/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to the production of rolled stock of low-alloyed stainless steels for bridge construction, unpainted structural contact network of electrified railways, viaduct roads and other structures. The method includes steel smelting in a steelmaking unit, steel production in a steel ladle, alloying, out-of-furnace processing and casting of steel, austenization. Steel with the following chemical composition is obtained, wt %: carbon 0.08-0.25, manganese 0.5-1.3, silicon 0.05-0.8, chrome 0.3-1.3, nickel 0.2-1.0, copper 0.2-1.0, aluminium 0.01-0.09, sulphur not more than 0.02, phosphorus not more than 0.02, nitrogen not more than 0.012, one or more components selected from the group: molybdenum 0.0005-0.05, vanadium 0.0005-0.05, niobium 0.0005-0.05, zirconium 0.0001-0.015, iron and unavoidable impurities - the rest. Release of steel from the steelmaking unit into the steel ladle is carried out for 3-8 minutes, and the steel is cast at a temperature of 1505-1560°C with a rate of 0.4-6 m/min.

EFFECT: invention allows to expand the scope of proposed steel grade with ensuring its high resistance to atmospheric corrosion, improve the quality and mechanical properties of rolled products.

9 cl, 2 ex, 2 tbl