Project Description


Induction hardening is a process that is used to harden, bonding or soften metals or other conductive materials.

The induction heating systems do not burn as traditional fossil fuels. Induction is a clean, non-polluting process that helps protect the environment.

In induction hardening the steels used usually contain a carbon percentage between 0.30% and 0.70% (“hypoeutectoid steels”).

This process is based on Faraday’s law implies that when an alternating current is applied to the primary of a transformer an electromagnetic field is created. When the secondary is introduced in this field an electric current is induced.

In a basic configuration of induction hardening, a power supply generates an alternating current through an inductor within which the part to be treated is placed. The inductor acts as the transformer primary and secondary circuit as the part. When the metal part is crossed by the magnetic field,”Foucault” currents are induced in them flowing against the electrical resistivity of this. This creates a localized and precise heat without direct contact between the part and the inductor. This effect occurs both magnetic parts as nonmagnetic and is known as the “Joule” effect.

Induction Hardening can be done in two ways:

In STATIC: Consists on locating the piece opposite the inductor without dragging during operation.

PROGRESSIVE ( By Parade): Consists on tour the part performing continuous operation or moving the workpiece or inductor.


1/ You can treat a particular part of the piece (Quenching Profile).

2/ Power applied Management. Frequency control and heating times.

3/ Control of cooling parameters.

4/ Energy saving.

5/ Temperature control and location

6/Possibilities of Harden different dimensions of parts and inner diameters.

7/Different types of frequency and power depending on the required lid depth.


We have capacity for shafts up to 1.5 meters long.

We can harden diameters up to 500 mm.

We manage to reach hardness layers between 0.5-5 mm.

We have autonomous control Hardering machines

We have integrated a complete quality control laboratory.

We want to offer the best…


Components / year
Different references / year
Satisfied customers/ year


We specialize in manufacturing serial middle and high volume as well as heat treatments and finishes, including CNC turning, bar turning, milling, drilling, tapping, broaching, grinding, grinding, heat treatment, induction hardening of parts up to 2 m, ball mill, coating, etc.

Torneado de precisión

Nuestra historia

APRIM is established in 1965 with a core activity focused on the manufacture and machining of parts and assemblies destined for the Automotive Industry and Transport, APRIM then begins production. Over time, APRIM has evolved to offer a wide diversification of services including manufacturing and assembly kits sets with not only mechanical components, also pneumatic, electric, electronic, etc.