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公开(公告)号:US11925979B2
公开(公告)日:2024-03-12
申请号:US17531381
申请日:2021-11-19
Applicant: INDUCTOTHERM CORP.
Inventor: Satyen N. Prabhu , Mike Maochang Cao , Nier Wu
Abstract: Large steel ingot casting is accomplished with a top suspended induction heating device supplied with variable power and variable frequency from a power source. By the induction heating and stirring provided by the top suspended induction heating device, metal solidification advances progressively upwards from bottom to top, and the upper molten metal in a riser part compensates for shrinkage of the lower solidified metal in the main part. Inclusions are selectively moved out of the molten metal by a variable electromagnetic stirring force and the formation of casting defects is suppressed.