ONE TIME COLD-ROLLED STEEL STRIP FOR SHADOW MASK AND METHOD OF ITS MANUFACTURING Russian patent published in 2010 - IPC C22C38/28 C21D8/04 

FIELD: metallurgy.

SUBSTANCE: invention elates to manufacturing of steel strip, used for shadow mask in colour kinescope. Strip is manufactured from steel of following content, wt %: C ≤ 0.002; Ti 0.035-0.05; Mn 0.10-0.25; Al 0.03-0.06; Cr 0.002-0.03; Si ≤ 0.03; N ≤ 0.003; P ≤ 0.012; S ≤ 0.001; O ≤ 0.004; Fe and unavoidable admixtures - the rest, herewith on surface of steel strip in essence are absent strips in the rolling direction and height of strip water do not exceed 2.0 mm. Strip is manufactured by means of melting, pouring, hot rolling at final temperature from 880 up to 900°C, winding at temperature from 510 up to 610°C, etching and cold rolling. Then it is implemented preliminary trimming on preparatory line and cut of border defects, continuous annealing at temperature from 675 up to 695°C and isolation from 20 up to 35 s, and pinch rolling on two pinch-pass mills, allowing each six rollers.

EFFECT: strip allows properties and quality, satisfying requirements for steel strip for shadow mask, used in colour kinescope, at effectiveness increase of manufacturing and its cost cutting.

12 cl, 3 tbl, 11 ex