Patent ID: 7163047
Filing Date: 2007-01-16
Classification: B22D

Abstract:
1. A method of producing thin cast strip by continuous casting comprising the steps of: a. assembling a thin strip caster having a pair of casting rolls having a nip there between; b. assembling a metal delivery system capable of forming a casting pool between the cast rolls above the nip with side dams adjacent the ends of the nip to confine said casting pool; c. assembling upper and lower pinch rolls each having a diameter between 300 and 1500 mm forming a pair of pinch rolls positioned laterally adjacent each other to form a nip between them through which metal strip formed by the caster can pass, where said upper and lower pinch rolls are positioned one above the other with the axes of the pinch rolls offset between 10 and 130 mm in the direction of travel of strip through the pinch rolls, and with the upper pinch roll offset downstream of the direction of travel of the strip through the pinch rolls; d. introducing molten steel between the pair of casting rolls to form a casting pool supported on casting surfaces of the casting rolls confined by said first side dams; e. counter-rotating the casting rolls to form solidified metal shells on the surfaces of the casting rolls and to cast from the solidified shells thin steel strip through the nip between the casting rolls; and f. counter rotating the pinch rolls to cause strip cast by the casting rolls to pass through the nip of the pinch rolls; and g. tilting the upper pinch roll relative to lower pinch roll between 0.5 and 5.0 mm, measured at the edge of the strip, using a pinch roll tilt drive to control steering of the strip passing through the pinch rolls.