Induction Hardness


 Induction heat treating, through the highly controllable use of an electrical heated coil, will allow you to select the best physical characteristics for not only each part—but for each section on that part.  Induction hardening can impart superior wearability to bearing journals and shaft sections without sacrificing the ductility necessary to handle shock loads and vibration.

How exactly does induction heating work? It helps to have a basic understanding of the principles of electricity. When an alternating electrical current is applied to the primary of a transformer, an alternating magnetic field is created. According to Faraday’s Law, if the secondary of the transformer is located within the magnetic field, an electric current will be induced.

In a basic induction heating setup, a solid state RF power supply sends an AC current through a copper coil, and the part to be heated is placed inside the coil. The coil serves as the transformer primary and the part to be heated becomes a short circuit secondary. When a metal part is placed within the coil and enters the magnetic field, circulating eddy currents are induced within the part. These currents flow against the electrical re sensitivity of the metal, generating precise and localized heat without any direct contact between the part and the coil.