Hardening furnace: It is apply to heating, tempering, quenching ... treatment of metal component surface like quenching, annealing, tempering, drill bit welding, saw blade welding, motor rotor welding, ... ×1800Quenching, annealing, tempering, diathermy, metal smelting, welding of drill bits, saw blades, steel tubes and motor rotors, as ... the customer. Transistor High frequency induction hardening furnace