What is high frequency quenching What is the working principle of high frequency continuous quenching
Quenching is an indispensable process in metal smelting, and now quenching technology has also made great supplements, such as high-frequency quenching. Next, Kehua will introduce to you what is high-frequency quenching and what is the working principle of high-frequency continuous quenching? What is high-frequency continuous quenching? High-frequency quenching is mostly used for surface quenching of industrial metal parts. A metal heat treatment method in which the induced current rapidly heats the surface of the part and then rapidly quenches it. Induction heating equipment, that is, equipment for induction heating of workpieces for surface quenching. The principle of induction heating: the workpiece is placed in the inductor, and the inductor is generally a hollow copper tube inputting intermediate frequency or high frequency alternating current (1000-300000Hz or higher). The alternating magnetic field generates an induced current of the same frequency in the workpiece. The distribution of this induced current in the workpiece is uneven, it is strong on the surface, but very weak in the interior, and it is close to 0 in the center. This skin effect is used. , the surface of the workpiece can be heated rapidly. What is the working principle of high-frequency continuous quenching? The workpiece is placed in an inductor wound with a hollow copper tube, and after passing in an intermediate frequency or high-frequency alternating current, an induced current of the same frequency is formed on the surface of the workpiece, and the parts are The surface or part is rapidly heated (the temperature can be increased to 800-1000°C in a few seconds, and the heart is still close to room temperature), and after a few seconds, spray (immersion) water cooling (or spray immersion oil cooling) immediately to complete the immersion work, so that the workpiece can be immersed. The surface or local parts meet the corresponding hardness requirements. Through rapid heating, the surface of the steel to be processed reaches the quenching temperature, and it cools rapidly without waiting for the heat to reach the center, only the surface layer is quenched into martensite, and the center is still annealed (or positive) with good plasticity and toughness. Fire and tempering) organization. After reading Kehua's introduction, everyone must already know what high-frequency quenching is. High-frequency continuous quenching technology is only used in certain specific situations.