The current frequencies commonly used in equipo de enfriamiento de alta frecuencia son:

1. Calentamiento de alta frecuencia: 100 ～ 500KHZ, comúnmente usado 200 ～ 300KHZ, es un calentamiento de alta frecuencia tipo tubo electrónico, la profundidad de la capa de endurecimiento es 0.5 ～ 2.5mm, adecuado para piezas pequeñas y medianas.

2. 2. Intermediate frequency heating: The current frequency is 500～10000HZ, usually 2500～8000HZ. The power supply equipment is a mechanical intermediate frequency heating device or a silicon controlled intermediate frequency generator. The depth of the hardened layer is 2-10 mm. Suitable for large diameter shafts, medium and large gears, etc. 3. Power frequency heating: The current frequency is 50HZ. Using mechanical power frequency heating power equipment, the depth of the hardened layer can reach 10-20mm, which is suitable for surface quenching of large-diameter workpieces.