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What is High-frequency Quenching?

High-frequency quenching is mostly used for surface quenching of industrial metal parts. It is a kind of metal heat treatment method that makes the workpiece surface produce a certain induced current, quickly heat the surface of the parts, and then quickly quenching.Induction heating equipment, that is, the workpiece induction heating, in order to surface quenching equipment.

The principle of induction heating:The workpiece is put in the wind with the hollow copper pipe in sensor, after access to intermediate frequency or high frequency alternating current (ac), formed in the surface with the frequency of the induced current, the workpiece surface or local rapid heating (a few seconds to temperatures of 800 ~ 1000 ℃, the core is still close to room temperature) immediately after several seconds quickly spray (dip) water cooling (or spray oil immersion cooling) complete immersion fire work,Make the workpiece surface or local to achieve the corresponding hardness requirements.

Compared with ordinary heating quenching, it has:

1. The heating speed is very fast, which can expand the range of A body transition temperature and shorten the transition time.

2. Very fine cryptocrystalline martensite can be obtained on the surface of the workpiece after quenching, and the hardness is slightly higher (2 ~ 3HRC).Low brittleness and high fatigue strength.

3. The workpiece treated by the process is not easy to oxidize and decarbonize, and even some of the workpiece can be directly assembled and used after processing.

4, the hardening layer is deep, easy to control the operation, easy to realize mechanization, automation.

5, the flame surface heating quenching

High frequency quenching is applied to the workpiece which needs to bear the action of alternating load such as torsion and bending. It requires the surface layer to bear higher stress or wear resistance than the core, and the surface of the workpiece needs to be strengthened. It is suitable for steel with carbon content We=0.40 ~ 0.50%.


Post time: Jun-10-2021