Casting rolls and methods for casting metal strips using crown control

摘要

The present invention relates to a casting roll 12 for casting of a metal strip 21 by continuous casting in a twin roll casting machine, the casting roll 12 having a casting surface formed by a substantially cylindrical tube 120 ( 12A) and have axial symmetric expansion elements, such as expansion rings 101-119, arranged in and adjacent the cylindrical tube 120, each expansion element being spaced apart from other expansion elements. And the expansion elements are adapted to cause the cylindrical tube to expand, while increasing the radial dimension, while varying the thickness profile of the cast crown and the roll crown of the casting surfaces of the casting rolls during casting. The elements, such as the inflation rings 101-119, are distributed along the entire length of the cylindrical tube 120, and direct the power supply of the inflation elements 101-119 to one or more inflation elements. The power switch is placed on or on the casting roll 12 to switch from to one or more other expansion elements. The method of continuously casting thin strips by controlling the roll crowns allows at least one expansion element to increase in radial dimensions, preferably by heating, causing the cylindrical tube 120 to expand, while at least one other expansion The element is characterized in that the radial dimension is not increased.