Frequency and working principle of induction hardening equipment

Quenching is an indispensable process in metal heat treatment. Nowadays, the quenching technology has made great progress. For example, induction quenching is a very advanced technology. So, how to choose the frequency of induction hardening equipment and what is the working principle of induction hardening equipment?

How to choose the frequency of intermediate frequency induction hardening?

The frequency of use of induction heating surface hardening is different, which can be divided into medium frequency and high frequency. Due to the different frequency of the current, the depth of heat penetration of the induced current is different during heating. When using high frequency, the penetration depth of the induced current is very small, and it is mainly used for surface quenching of small modulus gears and small shaft parts. When using intermediate frequency, the induced current penetrates deeply and is mainly used for surface hardening of gears, camshafts and crankshafts with medium and small modules.

What is the working principle of medium frequency induction hardening equipment?

Intermediate frequency induction hardening equipment is to put the workpiece in an inductor made of copper pipes. A certain frequency of alternating current is passed into the inductor, and an alternating magnetic field with the same frequency will be generated around the inductor, so that the workpiece will be generated Induced current of the same frequency, this current forms a loop in the workpiece, which is called eddy current. This eddy current can turn electrical energy into heat to heat the workpiece.