Induction Hardening

What is induction surface hardening?

In induction hardening, only the zone of the part that needs to be hard is heated to hardening temperature within a short time by the magnetic field of a high-frequency current flowing through a copper inductor, and is quenched immediately afterwards. A hard, wear-resistant layer forms at the surface while the core stays tough. Because the heat is kept to a narrow zone, the rest of the part is not affected and distortion is reduced.

Capacity and frequency

We carry out induction surface hardening with low, medium and high-frequency induction systems ranging from 20 kW to 500 kW. We started in 2014 at Hasköy Industrial Estate with two induction machines of 50 kW and 75 kW and have expanded our machine park ever since.

The frequency is chosen according to the required case depth: high frequency gives a thin hardened layer, low frequency a deeper one.

Application methods

Depending on the shape of the part and the zone to be hardened, we use different induction methods:

• Scanning
• Single-shot
• Lift-and-rotate
• Rotary table
• Longitudinal transfer

Which parts and steels?

Wearing or load-bearing zones such as shafts, axles, gears, pins, rollers, pulleys, and bearing and seal seats are induction hardened. The steel needs enough carbon to harden: medium-carbon and quenched and tempered steels such as C45 and 42CrMo4 are the most suitable group. For low-carbon steels, case hardening is preferred to obtain a hard surface.

Inductors and one workshop

We also design and build the water-cooled copper inductor to match the shape of your part: Inductor Manufacturing. Steps after induction hardening, such as tempering, straightening, grinding and quality control, are completed in the same workshop.

For a quote

Attach your drawing and state the steel grade, the zone to be hardened, the required surface hardness (e.g. HRC) and the case depth in the quote form.