The thermal treatment of cementing and hardening gives particular surface qualities to the product. It consists of enriching the surface layers of the piece with carbon in order to obtain a hardening and an increase in wear resistance.
The cementing phase is carried out at temperatures above the critical point (Ac3) of transformation, for a maintenance time of a few hours. Once the cementing phase is completed, the piece is rapidly cooled (quenching) in oil to induce the martensitic transformation of the steel. Subsequently a tempering at low temperature also called "distension" is performed.
DEMM is equipped with dual-chamber and single-chamber heat treatment systems.