METHOD OF PRODUCING HOT-ROLLED SHEET STEEL Russian patent published in 2013 - IPC B21B1/28 

FIELD: process engineering.

SUBSTANCE: invention relates to metallurgy and can be used in rolling of cold-rolled strips of low-carbon steel at continuous mills with subsequent annealing at in-and-out furnaces. Proposed method comprises charging the indented working rolls with roughness R_a of 3-5 mcm into last stand of continuous mill with specified reduction in said stand, reeling the strips and their recrystallisation annealing at in-and-out furnace wherein relative reduction is set equal to 2-5% and, to termination of rolls campaign, it is increased to 18-22% at simultaneous appropriate decrease in reductions at previous stands and set as follows proceeding from the ratio: ε=(2÷5)+0,106·L where L is total length of rolled strip from the begging of working roll campaign in the last furnace, km.

EFFECT: higher quality of steel sheet.

1 tbl, 3 ex