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Induction Heat Treating
Tempering, Softening, Annealing, Normalising
Tempering, Softening, Annealing, Normalising
Tempering after hardening was traditionally done in chamber furnaces, as a batch operation, at low temperatures for prolonged duration (typically at 200oC for 90 minutes).
Tempering by induction, after the hardening operation, is done in the same machine. Tempering is done at 300 to 400o C, for a very short duration, with metallurgical results almost the same or close to the traditional furnace tempering. Being an on-line process, very amenable for installation in a cell.
Softening of selected zones of carburised and hardened components is conveniently done by induction, with consistent results. Popular for carrying out post-hardening processing in softened areas.
Annealing and normalising, which have been the traditional applications of chamber furnaces, are also done by induction. Low power density and a low frequency are employed to ensure proper 'soaking' of heat through the body.
Use of induction power for above applications allows automation, instant starting up of equipment, intermittent operations and effective process monitoring and control.
more application info
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