Coating Systems

Vacuum Furnaces


Vacuum furnaces for heat treatment, soldering and sintering of ceramic and superalloy components.

Vacuum furnaces are widely used for heat treatment processes and are a requirement for high temperature diffusion brazing. Electron has various horizontal and vertical vacuum furnaces from Schmetz and is happy to advise you on the best solution for your application.


Load weight 50 - 5000 kg (gross)

Hot zone round or square

graphite or molybdenum

10-2 mbar-range, 10-5 mbar-range, 10-6 mbar-range

max. 1350°C, 1500°C, 1600°C

cooling pressure 0,9, <1,5, 6, 10, 13 bar or higher (abs.)

proces gas: nitrogen, argon, helium, etc.

Thermprocess Management System "TMS"

Hardening (vacuumhardening with overpressure gas quench)

Tempering (in vacuum- or gas atmosphere)

"sub zero" treatment (until - 145°C)

Annealing (stress-relieving and soft annealing)

Soldering (in Fine- or Highvacuum- atmosphere)

Cold wall

The horizontal front loader vacuum furnace is designed on the "cold-wall principle". The cylindrical outer casing is a horizontal construction, double-walled and water-cooled. Thermal strain is hereby excluded as no measurable temperature will be transferred to the outside wall.


Inside the casing the following components are located: hot zone, heat exchanger, high capacity radial fan with electric motor and the gas ducts. Outside the casing the vacuum pump station, the transformers and the switchboard are installed. This compact design guarantees an extremely low need of space. The layout will be adapted widely with the local facilities. The maintenance friendly design is leading to an easy access to all elements and components of the furnace.

Maintenance friendly design

Loading and unloading of the furnace is done from the front. The load is hereby positioned with a rail guided loading car (option) exactly into the hot zone. The jigs and fixtures are laying on top of transport forks and will be lowered with an hydraulic cylinder system towards the load supports in the hot zone. The swiveling furnace door will be secured with the furnace casing hydraulically / electrically against overpressure after loading. The required time-/temperature cycle is running fully automatically afterwards

Multiple options

According to the application the furnace is equipped with appropriate vacuum systems, rectangular or round hot zone geometry as well as insulation made of graphite or molybdenum + stainless steel. An optional convection system optimises heating-up speed and uniformity. Appropriate cooling gas pressure stages from 0,9 up to 13 bar (abs.) and higher realise intensive quenching speeds according to individual requirements of component, material quality and load. Multi-direction cooling systems ensure best distortion low heat treatment results. The wide range of standard sizes offers the suitale furnace for the particular component and requested capacity.

More information?

Please contact us if you are interested to learn more about any features of our vacuum furnace equipment and we would be pleased to discuss and explain our many value adding technologies within this specialist area.

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