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The application and basic principle of high frequency quenching [picture] revealed

by:Kehua     2022-07-22
We have learned about high-frequency quenching in previous articles, but many friends may not know much about the application of high-frequency quenching. In order to satisfy the curiosity of these friends, let the experts from Kehua come to give We explain the application of induction hardening. Application of high-frequency quenching Application of high-frequency quenching For workpieces subjected to alternating loads such as torsion and bending, the surface layer is required to withstand higher stress or wear resistance than the core, and the surface of the workpiece needs to be strengthened, suitable for carbon-containing Quantity Weu003d0.40~0.50% steel. Relevant explanation of high frequency quenching Selection of induction heating frequency: The frequency is selected according to the technical requirements of heat treatment and the requirements of heating depth. The higher the frequency, the shallower the heating depth. The depth of high frequency (above 10KHZ) heating is 0.5-2.5mm, which is generally used for heating of small and medium-sized parts, such as small module gears and small and medium-sized shaft parts. The intermediate frequency (1~10KHZ) heating depth is 2-10mm, which is generally used for the heating of shafts with large diameters and gears with large and medium modules. The depth of the hardened layer by power frequency (50HZ) heating is 10-20mm, which is generally used for diathermy of larger-sized parts and surface quenching of large-diameter parts (diameter Ø: 300mm or more, such as rolls, etc.). The depth of the surface hardened layer of induction heating quenching depends on the frequency of the alternating current. Generally, the higher the frequency, the shallower the heating depth, and the shallower the depth of the hardened layer. The relationship between frequency f and heating depth δ has the following empirical formula: δu003d20/√f(20°C); δu003d500/√f(800°C). Application of high frequency quenching In the formula: f is the frequency, the unit is Hz; δ is the heating depth, the unit is millimeter (mm). Induction heating surface quenching has the advantages of good surface quality, small brittleness, quenched surface is not easy to oxidize and decarburize, and small deformation, so induction heating equipment has been widely used in metal surface heat treatment. Induction heating equipment is a device that generates an induction current of a specific frequency and performs induction heating and surface quenching treatment. The application of high-frequency quenching The basic principle of high-frequency quenching The workpiece is placed in an inductor wound with a hollow copper tube. Local rapid heating (800~1000℃ in a few seconds, the heart is still close to room temperature), spray (immersion) water cooling (or spray immersion oil cooling) immediately after a few seconds to complete the immersion work, so that the workpiece surface or Locally meet the corresponding hardness requirements. Regarding the application of high-frequency quenching, Kehua's experts have explained it to us very clearly. The editor is very happy to help you solve your doubts. If you have any questions, you are welcome to consult.
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