heat treatment, shaft, gear, quenching and annealing stainless steel products and put quenching as an example, The shallower of the quenching layer. the higher of the frequency. The deeper of the quenching layer. the lower of the frequency. Such as: hardening layer 0. 2-0. 8mm applicable UHF 100-250 KHz, high-frequency 1. 0-1. 5mm applicable 40-50 Khz high-frequency, super-audio 1. 5-2. 0mm applicable VHF 20-25 Khz 2. 0-3. 0mm applicable VHF 8-20 KHz, IF 3. 0-5. 0mm applicable 4-8 KHz IF 5. 0-8. 0mm applicable 2. 5-4 Khz IF A unique cooling circulation system, ensure that the equipment 24 hours of continuous work. Small size, light weight, simple installation, operation is very convenient; High efficiency, energy saving is very clear that energy-saving than traditional high-frequency equipment 60%, saving 20% compared with SCR-IF; Safe and reliable, non-million-volt high-pressure, pairs of operators is very safe; Almost no oxide layer, there is no gas and has no waste water produced.