steel plate induction heating for hardening

Induction heating systems for hardening are available in a variety of different operating frequencies typically from 1 kHz to 400 kHz. Higher and lower frequencies are available but typically these will be used for specialist applications. The relationship between operating frequency and current penetration depth and therefore hardness depth is inversely proportional. i.e. the lower the frequency the deeper the case.

For steel plate,thickness 12 mm,Duolin will choose frequency 10-30Khz for heating,the depth after hardening is 2-3 mm