Device for induction heating of a billet

A device for the induction heating of a billet of metal material having relatively high electrical conductivity comprising:

• at least one tubular body comprising a plurality of permanent magnets arranged in a ring parallel to respective generatrices of the tubular body, angularly spaced apart from each other and arranged so as to be alternated with opposite polarities;
• at least one support for the billet adapted to support, in use, the billet arranged within the tubular body and facing the magnets;
• and
• driving means to produce, in use, a relative rotation between the tubular body and the billet in order to produce, due to a relative motion of the magnets with respect to the metal material of the billet, induced currents in the billet that circulate within the billet itself, thereby obtaining a heating of the metal material by the Joule effect;
• and
• a cooling system for the permanent magnets integrally carried by the tubular body and adapted to feed cooling air flows between adjacent permanent magnets.