Semi-finished products are heated in chamber furnaces until reaching temperatures between 880° and 920° C. Methane
enriched air is blown inside the furnace so that carbon can be better absorbed on the surfaces of the various components.
The following oil hardening process at 850° C confers to the external carbon layer a high level of hardness and resistance
to wear. Stress relieving is carried out at temperatures between 180° and 240° to obtain the requested final hardness and a
variable depth of the cemented layer which is strictly correlated to the time span of the blowing phase.
Ammonia is added in some cases, to obtain harder nitrides. Our partners developed a series of treatment cycles, tested on a
regular basis, that allow reaching hardnesses and cementation depths as requested by our customers.
