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What are the factors that affect induction hardening in practice

The quality of induction heating quenching depends to a large extent on whether the form and construction of the inductor are chosen correctly.
Depending on the shape of the inductor, the distance between the inductor and the heated workpiece, and the power of the input inductor and the frequency of the supply current, the surface of the workpiece can be heated to a certain depth and shape, the same sensor, by changing the input The power and current frequencies allow for different depths of heating. Generally, the air gap between the heated part and the inductor does not exceed 2 to 5 mm. Increasing this gap reduces the heating efficiency, and reducing this gap makes it possible to break the air in the gap.
(1) Number of sensors
The number of turns of the inductor depends on the quenching process. If water is sprayed immediately after heating, it can be made into a single-turn sensor, but it is highly difficult to increase. It is more convenient to bend the copper tube into multiple turns, but the number of turns should not be too much, generally not more than 3 inches, that is, the height of the inductor is preferably not more than 60 mm, otherwise the output efficiency of the high frequency device will be lowered.
(2) Materials for making sensors
The material used to make the inductor should be industrial pure copper (copper tube) or brass with a conductivity of not less than 96% of pure copper.
(3) Form of sensor
The form of the sensor can be designed and manufactured according to the shape and specific conditions of the workpiece.
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