Vertical Heat Treating Equipments Set Used for Isothermal Quenching of Ductile Iron

Technical requirements for austenization -heating furnace and isothermal quenching bath used in isothermal quenching of ductile iron were described. It was pointed out that the time interval from the heating furnace to the isothermal quenching bath must be less than 40 s. The constitutional equipments, characteristics, specifications and main technical parameters of the self-developed vertical heat treating equipments set used for isothermal quenching treament of ductile iron gears, crankshafts and other shaft -shaped parts were introduced in detail. Having been isothermally quenched with the equipments set, the ductile iron automobile helical-bevel gears fulfiled requirements of all items of mechanical properties, and at the same time, brought satisfactory economical effect.