Induction furnace: mainly used for heating forged metal materials, hot extrusion molding process, as well as bar, wire, strip, high-pressure pipe annealing, tempering, quenching and other processes. Features: fast heating, less oxidation and decarbonization, high degree of automation, good working environment, with computers, PLC and other equipment for remote control, enabling automatic unattended operation, easy to complete production lines. Uniform heating, high efficiency, high precision temperature control, process repeatability. Simple structure, easy to remove, replace furnace and transport. Diathermy is the overall penetration of heating the metal thermal deformation or heat treatment before a 50HZ AC power frequency into an intermediate frequency (30HZ above to 20KHZ) of the power supply unit, the frequency alternating current into direct current three-phase rectifier, then Direct injection into the electric adjustable frequency current is supplied by the capacitor and the induction coil in the intermediate frequency alternating current to flow through, resulting in the induction coil in the high-density magnetic and induction loop in bloom cutting metal materials, metal materials have a great vortex. This vortex also have properties intermediate frequency current, i.e., the free electrons in the metal itself has a metal body in the female electrical heat flow to be generated.