1. The quenching depth of the intermediate frequency electric furnace is 2~5mm.

2. The medium frequency electric furnace is a power supply device that converts the power frequency 50HZ alternating current into an intermediate frequency (300HZ or more to 10000 HZ), and is composed of a frequency conversion device, a furnace body, and a furnace front control.

3. Principle: According to the basic principle of electromagnetic induction, the three-phase power frequency AC power is rectified into DC power, and then the DC power is changed into an adjustable medium frequency current, and the load composed of the capacitor and the induction coil is supplied (the coil and the capacitor can be connected in parallel, It can also be connected in series) to produce high-density magnetic lines in the induction coil and to cut the metal material contained in the induction coil to generate a large eddy current in the metal material. This eddy current also has some properties of the intermediate frequency current, that is, the free electrons of the metal itself flow in the metal body with resistance to generate heat. For example, a metal cylinder is placed in an induction coil with alternating intermediate frequency current. The metal cylinder is not in direct contact with the induction coil. The temperature of the energized coil itself is already low, but the surface of the cylinder is heated to redness or even melt. And the speed of this redness and melting can be achieved by adjusting the frequency and current intensity. If the cylinder is placed in the center of the coil, the temperature around the cylinder is the same. The cylinder is heated and melted without generating harmful gases or strong light to pollute the environment.