COLD-ROLLED STEEL SHEET AND METHOD OF ITS PRODUCTION Russian patent published in 2015 - IPC C22C38/06 C21D8/02 

FIELD: metallurgy.

SUBSTANCE: plate is made from steel containing in wt %: C from 0.01 to 0.4, Si from 0.001 to 2.5, Mn from 0.001 to 4.0, Al from 0.001 to 2.0, P 0.15 or below, S 0.03 or below, N 0.01 or below, O 0.01 or below, Fe and inevitable admixtures - rest. Average pole density of the orientation group from {100}<011> to {223}<110> is from 1.0 to 5.0, and pole density of the crystal {332}<113> orientation is from 1.0 to 4.0 at central area of thickness, in thickness range from 5/8 to 3/8 from surface base of the steel plate. Lankford rC value in direction at right angle to the rolling direction is from 0.70 to 1.50, and Lankford r30 value in direction at angle 30° to the rolling direction is from 0.70 to 1.50. Plate structure is: from 30% to 99% ferrite and bainite, from 1% to 70% - martensite.

EFFECT: increased uniform and local deformability.

24 cl, 26 tbl, 1 ex