High-temperature vacuum heat treatment furnace problems needing attention
Time：2015-05-19 08:58 Click：
High temperature vacuum annealing furnace There are many issues that need attention, the first thing to note is the use of fast-cooling device, the cooling water pressure should be greater than 0.2Mpa. There are also several aspects, we also pay attention to you!
When the workpiece after heating, the workpiece into the high-temperature furnace generally need to pre-pumping 6.67Pa reheating heating, the workpiece material and the furnace heating process should pay attention to deflation, the vacuum degree drop.
When the cooling gas, steel commonly used 99.995% purity nitrogen, high temperature alloys using 99.999% nitrogen or argon, titanium using 99.995% argon. Vacuum furnace section requires an active connection in all O-rings to seal the connection, in addition to this part of the required water cooling, vacuum heat to radiate the main piece in the furnace should keep a certain distance.
Workpiece under vacuum quenching, vacuum quenching oil should be used, because the oil has a low saturated vapor pressure, help protect the high-temperature furnace. For high-temperature furnace maintenance should vacuum or under nitrogen charge state, in order to avoid the emergence usually inhale, do not absorb moisture problems.