High-temperature vacuum heat treatment furnace experiment po
1. High-temperature furnace vacuum furnace should have a fast-cooling device. Cooling water pressure should be greater than 0.2Mpa, traffic should be adjustable.
2. Heating up: After you insert the workpiece, usually before the first pre-heated to 6.67Pa pumping heating
3. Heating process, the workpiece material and the furnace will be deflated to a vacuum degree drop.
4. Cooling gas: steel commonly used 99.995% purity nitrogen, high temperature alloys using 99.999% nitrogen or argon, titanium using 99.995% argon.
5. Laboratory furnace vacuum furnace part in all the activities connected rubber O-ring seals the connection, this section are cooled by water.
6. The heating temperature vacuum annealing, vacuum annealing, vacuum and vacuum aging solution treatment temperature is generally the same as conventional treatment and heating.
7. Hardening of the workpiece in a vacuum, you should use a vacuum quenching oil, this oil has a lower saturation vapor pressure.
8. Laboratory furnace vacuum furnace maintenance should vacuum or nitrogen charge state, to avoid the usual intake when not absorb moisture.
9. Domestic vacuum furnace pressure rise rate should not exceed 1.33Pa / h, certain standards for foreign companies 0.67Pa / h
10. Titanium vacuum furnace process, should not use nitrogen as the cooling gas, because titanium and nitrogen at high temperatures, to form titanium nitride gold.
11. Vacuum heating to radiation main piece in the furnace should be kept spacing. (Laboratory furnace)