Surface induction hardening treatment
Surface treatments of tool steels

Surface induction hardening was the subject of the article [M 1 205]. In this section, we focus on aspects specific to the treatment of tool steels.

The induction heating process is essentially carried out using high-frequency (over 100 kHz) or medium-frequency (over 10 kHz) generators. It enables maximum power densities of the order of 1,000 W.cm^-2 to be developed in the surface layer of the parts to be treated, compared with the 25 W.cm^-2 of conventional radiant heating. The result is relatively rapid temperature rise rates and the possibility of localized structural...