LSW-120 120kw Electric IGBT Induction Quenching Hardening Machine
 
1. Induction heating equipment is mainly used in the field of heat treatment and quenching:

The ball bearing is an important part of the car, which requires a certain strength and wear resistance, as well as a high fatigue strength, stable size during the working process, and can withstand a certain impact, so it is required to be quenched and heat treated on the surface. For the heat treatment of ball bearings, we mostly use medium frequency induction heating machines.

Compared with ordinary heat quenching,It has the following advantages:
1. The heating speed is extremely fast, which can expand the transformation temperature range of the A body and shorten the transformation time. ​​
2. After quenching, the surface layer of the workpiece can obtain extremely fine cryptocrystalline martensite, and the hardness is slightly higher (2-3HRC). Lower brittleness and higher fatigue strength. ​​
3. The workpieces treated by this process are not easy to be oxidized and decarburized, and even some workpieces can be directly assembled and used after treatment. ​​
4. The hardened layer is deep, easy to control and operate, easy to realize mechanization and automation.
2.  Technical Parameter of High Frequency Induction Hardening Quenching Machine:

3. Induction Quenching Hardening Machine Application:

Quenching equipment is mainly used for heat treatment of mechanical parts; such as quenching of various gears, sprockets, various shafts, pins, etc.
(1) For auto parts and motorcycle parts hardening.
(2) For machinery parts, like gears, transmission wheels, axles, shafts, spline shafts, ball stud hardening.
(3) For machine tools quenching, like guide rail machine tools hardening.
(4) For spanner, pliers, CNC machines, hammer, axe hardening etc.

What is the purpose of high frequency quenching machine?
The main purpose is to improve the wear resistance of the metal surface. After quenching, the wear resistance is increased by 2-3 times and the service life of the workpiece is improved.

Selection of heating frequency:
The relationship between the depth δ (mm) of the induced current flowing into the surface layer of the workpiece at room temperature and the current frequency f (HZ) is: the frequency increases, the current penetration depth decreases, and the hardened layer decreases. ​​
Commonly used current frequencies are:
1. High frequency heating: 100~500KHZ, commonly used 200~300KHZ, it is a tube type high frequency heating, the hardened layer depth is 0.5~2.5mm, suitable for small and medium-sized parts. ​​
2. Intermediate frequency heating: the current frequency is 500~10000HZ, commonly used 2500~8000HZ, and the power supply equipment is a mechanical intermediate frequency heating device or a thyristor intermediate frequency generator. The depth of the hardened layer is 2 to 10 mm. Suitable for larger diameter shafts, medium and large gears, etc. ​​
3. Power frequency heating: the current frequency is 50HZ. Using mechanical power frequency heating power supply equipment, the hardened layer depth can reach 10-20mm, which is suitable for surface quenching of large-diameter workpieces.