What is induction heating What is the principle of induction heating? -Kehua
In the metallurgical industry, various enterprises will use heating equipment. There are many types of heating equipment, and induction heating equipment is one of the more commonly used ones. Next, Kehua will show you what induction heating is and what is the principle of pass-through induction heating? Pass-through induction heating What is induction heating Induction heating is a method of heating conductor materials such as metal materials. It is mainly used for metal thermal processing, heat treatment, welding and melting. As the name suggests, induction heating is the use of electromagnetic induction to generate a current inside the heated material, and rely on the energy of these eddy currents to achieve the purpose of heating. The basic components of an induction heating system include an induction coil, an AC power source and a workpiece. According to Kehua's understanding, the coils can be made into different shapes depending on the heating object. The coil is connected with a power source, and the power source provides alternating current to the coil, and the alternating current flowing through the coil generates an alternating magnetic field passing through the workpiece, and the magnetic field causes the workpiece to generate eddy currents to heat. What is the principle of pass-through induction heating? Pass-through induction heating? Surface quenching uses the principle of electromagnetic induction to generate a high-density induced current on the surface layer of the workpiece, which is rapidly heated to austenite state, and then rapidly cooled to obtain martensitic Quenching method of body tissue. When an alternating current of a certain frequency passes through the induction coil, an alternating magnetic field with the same frequency as the current changes will be generated inside and outside it. When the metal workpiece is placed in the induction coil, under the action of the magnetic field, an induced current with the same frequency as the induction coil and the opposite direction will be generated in the workpiece. Because the induced current forms a closed loop along the surface of the workpiece, it is often called an eddy current. This eddy current converts electrical energy into heat, rapidly heating the surface of the workpiece. Eddy currents are mainly distributed on the surface of the workpiece, and there is almost no current passing through the workpiece. This phenomenon is called the surface effect or the skin effect. Induction heating uses the skin effect to rapidly heat the surface of the workpiece to the quenching temperature by means of the current thermal effect. The induction coil is made of copper pipe, and cooling water is passed through it. When the surface of the workpiece is heated to a certain temperature in the induction coil, it is immediately cooled by water spray, so that the surface layer can obtain a martensite structure. Now many companies are using pass-through induction heating equipment, which has the characteristics of fast heating speed and saves more energy than other heating equipment in terms of energy consumption.