At Tool Tech Industries we manufacture superior quality Induction Hardened Rolls and Shafts for various industries as per the client's requirements and drawings.
We can provide :
Depth of hardened layer: Up to 15 mm (different ranges).
Length of Roll: Up to 3500 mm max.
Diameter of Roll: Up to 400 mm max.
Induction hardening is a very popular method of roll hardening.
The process involves progressive heating of the rolls within a suitably designed inductor coil generating an alternating current of the desired frequency, quick soaking, and immediate quenching by pressure jets of water /polymer solution.
''Quick heat-Quick cool'' method ensures a very fine surface micro structure.
In the induction hardening process, the surface area up to a predetermined depth is only heated at the hardening temperature. This excludes the possibilities of mass effect in the eventual quenching. So induction hardened rolls always achieve more surface hardness value than volume hardened rolls, particularly for big masses.
Quick processing means a minimum time of exposure at the elevated temperature.so no scale is formed on the surface of the rolls.
For induction-hardened rolls, conversion to the lower usable size is possible after the life of the prevailing size is over with continuous use and repeated re-grindings. Here the worn-out hardened layer is peeled off and induction hardening is carried out on the virgin surface of the next usable size.
A post-grind stress-relieving treatment is also adopted for the rolls on a routing basis.