Vacuum heat treatment plant

The vacuum heat treatment plant of the company ALD, which is available at the IOB, is suitable for a whole series of processes of the thermo process technology:

  • annealing
  • hardning/tempering
  • solution heat treatment
  • soldering
  • aging
  • sintering

Heating can be carried out convectively, under N2/H2 partial pressure and/or under fine or high vacuum. The maximum operating temperature of the furnace system is 1600°C. This makes the system suitable for e.g. sintering high-temperature alloys.
Following the heating and holding process step, this heat treatment plant also offers the possibility of quenching the charge with nitrogen under pressure of up to 10 bar. The nitrogen is circulated in the furnace chamber by means of a high-speed fan and recooled via an integrated, water-cooled heat exchanger.


Technical data

Batch dimension 350 x 350 x 550 mm³ (WxHxL)
Gross batch weightmax. 200 kg
Nominal power furnace heating80 kW
Nominal temperature convective150 – 700°C
Nominal temperature Vacuum600 – 1600°C
Temperature uniformity+/- 5 K
Ultimate vacuum 
– in fine vacuum< 5 x 10-2 mbar
– in high vacuum< 5 x 10-5 mbar
Leak rate< 5 x 10-3 mbar l/s
Inert gas pressure in convection mode1,5 – 2,9 bar
Partial pressure operation with N2 or H21 – 20 mbar
Maximum pressure for gas quenching with N210 bar