METHOD OF STEEL PRODUCTION Russian patent published in 2005 - IPC

FIELD: ferrous metallurgy; methods of a steel production.

SUBSTANCE: the invention is pertaining to ferrous metallurgy, in particular, to the methods of production of steel for a deep drawing applied at production of items of a complex configuration, predominantly details of cars. The technical result of the invention is an increase of homogeneity of its mechanical properties and reduction of expenditure for its production. The technical result is reached by conducting a continuous casting of the steel containing of no more than 0.007 mass % of carbon and 0.006 mass % of nitrogen in slabs, their heating at the temperatures of 1000÷1160°C and their hot rolling in bands with the temperature of the end of rolling equal to 620 ÷ 720°C, chilling of bands by a still air and their reeling in rolls at temperatures of 600 ÷ 680°C, etching treatment, cold rolling with cold reduction by not less than 70 %, an annealing at temperatures of 650 ÷ 900°C and temper rolling. Aging of the cold-rolled steel at annealing conduct during 5÷18 minutes at temperatures of 750÷ 900°C in pusher-type furnaces, and aging for 11÷34 hours - at temperatures of 650÷ 750°C in the bell-type furnaces.

EFFECT: the invention ensures increased homogeneity of the steel mechanical properties and reduction of expenditure for its production.

2 cl, 1 dwg, 2 tbl, 1 ex