Method for altering casting roll profile with the alteration of localized temperature

A method of continuously casting thin metal strip comprising:

• providing a pair of internally cooled counter-rotatable casting rolls having casting surfaces laterally positioned to form a gap at a nip between the casting rolls through which a thin metal strip having a thickness of less than 3 mm is cast, where the casting surface of each casting roll of the pair of internally cooled counter rotatable casting rolls has a roll profile extending in an axial direction of a corresponding casting roll,
• providing a metal delivery system adapted to deliver molten metal above the nip to form a casting pool, the casting pool being supported on the casting surfaces of the pair of internally cooled counter-rotatable casting rolls and confined at the ends of the casting rolls,
• delivering a molten metal to the metal delivery system;
• delivering the molten metal from the metal delivery system above the nip to form the casting pool;
• counter rotating the pair of internally cooled counter-rotatable casting rolls to form metal shells on the casting surfaces of the casting rolls that are brought together at the nip to deliver the thin metal strip downwardly, the thin metal strip having a thickness less than 3 mm and an initial thickness profile;
• and,
• altering the roll profile of at least one of the pair of internally cooled counter rotating casting rolls by altering a temperature of the corresponding casting roll at a plurality of local locations along a length of the corresponding casting roll;
• using a plurality of electrical radiation heat sources external to an adjacent to the corresponding casting roll and corresponding to each of the plurality of local locations to locally apply heat directly to the corresponding casting roll.