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Why is it Induction Hardened ?

Among many application of induction Heaters, hardening is more predominant.it is worthwhile to summarise some of the advantages of it.

*
Efficient way of heating exactly at the specified area of the job.
* Uniform result with an established heating cycle.
* A substantial reduction in heating time, increased rate of production.
* Rejection reduction to minimum or entirely eliminated.
* Elimination of subsequent operation like cleaning and straightening.
* Elimination of dirty and hazardous carborising process.
* Cheaper, readily available and easily machinable plain carbon steel replaces    costly alloy and special steel.
* Accurate control of case depth.
* Quickest way of case hardening.
* No oxidation or scaling on the surface.
* Normalisation and tempering operation often eliminated.
* The inner cores and other surface practically remains cool and unaltered    metallurgical.
* Hyper hardness of 2 to 7 Rc higher than conventional means obtained because    of more complete solution and diffusion of iron carbide.
* Produces a fine and homogenous nodular type of martensite structure.
* Severity in quenching is not need as in case of furnace heating.
* Machinability after heat treatment is possible on surface other than the    specified hardened band.
* No skilled operator is needed and equipment can be completely utomated.
* No standby losses, no shutdown and less maintenance.¨ Equipment ready for    use immediately.
* Inspection requirement simplified by timely detection of defective parts during    heating.
* Uniform temperature distribution upon the desired depth by curie effect.
* A gradient transition zone form hardened surface to ductile core increases    strength.
* A good finish and fewer problems in grinding as a result of fine grain size.
* Does not require large area of floor space.
* Induction heating equipment can be incorporated with other machine in    manufacturing process.
* Operational environment is cleaner and safer than the other existing and    contemplated methods.
Selective hardening without copper plating and machining as in conventional    methods.
Self-quenching is possible with a rapid heating by high power density next only    to laser.
* Hardening the job submerged in quenching tank is possible only by this process.
* Different degree of hardness in single work piece.
* All these advantages of Induction hardening opens up new possibilities for a    design engineer in his product design.



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