Vacuum Furnace

A vacuum furnace will heat materials, typically metals, to very high temperatures and carry out processes such as brazing, sintering and heat treatment with high consistency and low contamination.

The processing of components through a vacuum furnace can offer many advantages over conventional thermal Vacuum Furnace treatment routes:

  • No surface oxidation or discolouration
  • Minimal distortion
  • No post cleaning operations
  • Near finished, machined shape prior to treatment
  • Flux free brazing
  • Combined vacuum/atmosphere processing
  • Repeatable quality
  • Environmentally acceptable furnaces
  • Clean, safe, quiet and efficient

Processes and applications include:

  • Vacuum heat treatment – hardening, tempering and annealing
  • Vacuum brazing
  • Sintering
  • Degassing

Specifications

  • Temperature up to 1300ºC as standard and options for higher temperatures
  • Double walled, water-cooled carbon or stainless steel chambers
  • Choice of hot zones including graphite and metal
  • Fully automatic high, low or custom vacuum systems
  • Inert gas recirculating fast cool system with internal fan and heat exchanger
  • Eurotherm instrumentation and PC control
  • Single or three zone temperature control
  • Jigs and fixtures standard or bespoke
  • Horizontal and vertical configurations

Heating metals to high temperatures normally causes rapid oxidation, which is undesirable. A vacuum furnace removes the oxygen and prevents this from happening.

An inert gas, such as Argon, is typically used to quickly cool the treated metal back to non-metallurgical levels (below 204 °C) after the desired process in the furnace.[1] This inert gas can be pressurized to two times atmosphere or more, then circulated through the hot zone area to pick up heat before passing through a heat exchanger to remove heat. This process continues until the desired temperature is reached.