METHOD OF STRIP STEEL COLD ROLLING Russian patent published in 2008 - IPC B21B1/28 

FIELD: technological processes; metallurgy.

SUBSTANCE: method includes serial pressing of billet in mills of continuous wideband cold rolling mill with preset value of relative drafting ε, with stripe tension and supply of lubricant-cooling emulsion (LOE) to stripe. Increase of uniformity of rollers wear in mills is provided by the fact that value ε is reduced in process of rolling, accepting value for all mills, where P₁ P_i, D₁ D_i; h₁ h_i - accordingly, actual pressure of metal on rollers, diameter of working rollers and thickness of strip that exits the mill for the first and i mill, at that for four-mill stand value ε for the I mill may be accepted within the limits of 30...36%, and in the second, third and fourth mills - to subsequently reduce it in every of them 1.2...1.5 times, and amount of supplied SOE is increased in process of rolling.

EFFECT: increase of efficiency due to reduction of time for rollers transfer in cold rolling of wide strips in continuous mills.

3 cl, 1 ex