Hunan hardening machine quenching machine where there is vertical, horizontal CNC quenching, shaft, disk parts, digital control, IGBT power supply with high precision DSP digital control, control of high precision, stable circuit operation. Resonant circuit as "a series resonant" accommodate multiple heating process. Power factor up to 0.95, low running costs, low failure rate. IGBT power, energy-saving vertical and horizontal CNC quenching machine in Zhuzhou, Hunan Industrial Heating Co., Ltd. / Hunan hardening machine quenching machine where