HARDENING

Induction hardening

In induction hardening, the areas to be hardened are heated using induction current and then quenched using a water spray if required.

Advantages of the process

Precise

Control

The entire process is customised to a single workpiece so that even components with complex geometries can be hardened.

Hardening of

partial areas

Precisely defined areas of the component can be hardened with low distortion, while the core structure remains unchanged.

Outstanding

component properties

Induction hardening produces components with high fatigue resistance and improved wear resistance in selected areas.

Any

component size

As no furnace is required for induction hardening, even very large components can be processed without any problems.

Technical!

Components Induction hardening:

Bolts, axles and shafts up to Ø 300mm x L= 3000mm
Rotation circulation hardening, feed hardening and mould inductor
Hardening of gear wheels rotation rotation up to Ø 300mm
Hardening of gears single tooth hardening up to Ø 600mm
Hardening of gear racks, rails and rails, forced hardening if necessary

Technical!

Process Induction hardening:

Mould inductor , Ring inductors , Special inductors , Large number of inductors available , Self-made
RHT HF 0.8mm to 2mm
RHT MF 1.5mm to 6.0mm
Reproducible process as inductor and parameter are defined and stored in NC
Between centres such as tailstock and chuck, rotary table, magnetic table and T-slot table

Hardened surfaces are subjected to stresses such as guides, bearing seats, sealing seats, radial shaft seal seats, gearing and external pressure gauges under load and torsion. Materials generally carbon steels from 0.30 C, heat-treatable steels, alloyed steels, X-steels, tool steels, stainless steels, valve steels and cast iron (by arrangement).

Heat treatment using induction current

Induction hardening is used to improve component properties by partially increasing the surface layer hardness and is ideal for highly complex or particularly bulky components.

While a large number of workpieces are hardened simultaneously during case hardening, induction hardening focusses on the individual part. The entire hardening process - from the inductor to the energy and frequency applied to the quenching and tempering process - is specially customised to the component in question. For this purpose, the areas to be hardened are heated using an inductor, a coil made of copper.

Precise process for components

The alternating current flowing through the coil generates an alternating magnetic field that heats the component to its transformation temperature.

If the heat can dissipate quickly enough into the rest of the still cold workpiece, quenching is not necessary afterwards.
This is an extremely precise process that is preferably used for components that are exposed to high loads. Induction results in an excellent surface hardness with a high case-hardening depth, which gives the component resistance to extreme loads.

The soft core and extremely hard outer layer improve fatigue resistance.

These properties are particularly important for components that are subject to torsional stress and for surfaces that are subject to impact forces. The process can only be used for materials with a carbon content of more than 0.35 per cent.