Induction Hardening

Standard – UNI 10990
Typical Materials – Quenched and tempered steels: C40, 42CrMo4, 39NiCrMo2, etc.
Metallurgical Characteristics Achievable – Surface hardness varies depending on the material: 50-65 HRC
– Effective treatment depth: 1.00 – 5.00mm

Induction hardening is typically applied to finished components after major machining operations. Post-treatment grinding may be necessary depending on the required tolerances.

Induction hardening is widely used for components that require high wear resistance or are subjected to significant mechanical stress. The treatment is performed locally, targeting only the surfaces where increased hardness is required.

The process involves heating the material beyond its austenitizing temperature using an inductor carrying an electric current. Immediately after austenitization, the heated portion is quenched with water or a polymer spray applied by a quenching system. To properly heat-treat the component, specific inductors and quenching systems are designed to fit the geometry of the area to be hardened; not all surfaces of a component are suitable for induction hardening.

Following the induction hardening process, a stress-relieving furnace treatment is always performed to reduce internal stresses and achieve the desired surface hardness in the hardened zones.