Double chamber vacuum oil quenching furnace

When the workpiece is in the oil cooling process, the oil cooling chamber shall be filled with the nitrogen of the pressure (0.4-0.67) x 105Pa (300 ~ 500). Cold indoor fill nitrogen, not only can improve the cooling capacity of the vacuum quenching oil, parts can reach pressure quenching hardness, more important is filling the nitrogen, inhibits the vacuum quenching oil volatilization of lower air cooled indoor concentration of oil mist (gas), the safety of the oil cooling quenching, played a protective role. At the same time, it also reduces the loss of vacuum oil and the pollution of the furnace, which is beneficial to the product quality and safety.

Artifacts into the oil, subject to sufficient cooling, oil cooling time should be determined by way of experiment), stay in air cooled room should be done after the oil, oil drain out of the workpiece (workpiece is especially important for perforated), and the oil cold chamber, vacuum oil mist to remove air cooled room space, and then close the vacuum valve, open the cold chamber air bleed valve, to average open oven door after unloading pressure (first, second, to prevent explosion conditions appear at the same time).