Inductotherm , leader in electric induction heating technology, discusses the application of induction to wire heating.
Induction heat treatment is accomplished by inducting electric currents within metal parts and can reduce many process times to minutes or even seconds, providing substantial energy savings. Induction's ability to concentrate heat in localised regions results in a hardened surface of controllable depth, backed by a less brittle core, combining the features of surface wear resistance with general strength and virtually no distortion.
Inductotherm has supplied many installations to the wire industry for such applications as low relaxation, coating, diffusion and the Hi-Bond process ( a process of hardening and tempering PC wire used in reinforced concrete structures). The result are low relaxation high yield strength wires which can be pre-stressed prior to casting the concrete formation.
In other wire heating applications, the wire strands can be heated in either single or multiple wires running parallel with each other.
Induction is just as effective for heating copper or aluminium wire prior to, or after a coating application