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vacuum brazing

Aalberts surface technologies > processes > vacuum brazing
what is vacuum brazing?
the process
in short
fields of application
groundbreaking industries
locations & contact

what is vacuum brazing?

Vacuum Brazing is a process that creates high quality joints under temperatures from about 800°C to 1150°C in a vacuum atmosphere. This also allows for the joining of different materials like for example ceramic to steel.

the process

Basically, brazing is a process that combines elements with the use of a brazing material. Prepared elements with applied brazing material are placed in a vacuum furnace and heated up to brazing temperature (from 800 to 1150°C) which is higher than the liquidus temperature. At this temperature, the parts are held for a short time (10 min) and then are slowly cooled to solidus temperature. This also allows for the joining of different materials like for example ceramic to steel.

During the process, the appropriate level of vacuum needs to be kept. Brazing in a vacuum furnace can also take place in a protective atmosphere, most often an argon atmosphere.

in short

A typical vacuum brazing treatment takes place as follows:

  • Cleaning the parts to be brazed
  • Assembly of braze (foil, thread, paste, powder, galvanic layer) and products
  • Setting up the part on the furnace frame
  • Furnace process (steered by microprocessor)
  • Unpacking and visual inspection
  • Testing / final check

 

The following aspects play an important role:

  • cleaning the parts to be brazed
  • the availability of clean assembly rooms
  • the use of high vacuum furnaces
  • the process variables
  • the loading tools
  • the testing facilities

fields of application

The most important properties of vacuum brazed connections are as follows:

  • Very strong and reproducible joints. Equal to or even stronger than the basic material.
  • By using precious brazing material, corrosion resistant joints are created.
  • Joints can be exposed to relatively high temperatures. (< 800 ºC)
  • Clean process. Products remain metallically blank.
  • Brazing without flux agents. Therefore, no undesirable surface reactions.
  • Very clean, hygienic gap free joint. Important for the food or medical industry.
  • Vacuum tight/leak proof joints.
  • Possibility of joining various materials with each other (e.g.: metal-ceramics).
  • Brazing and hardening possible in a single process.
  • Parts can undergo practically all hardening processes after a brazing treatment.
  • High level of construction freedom; thick/thin is possible, large surfaces can be joined.
  • More than one joint can be created in a single process. The creation of complex products is possible
  • High level of dimensional stability possible, no or practically no distortions.

groundbreaking industries we serve

Semiconductor Industry
semiconductors
Tool Manufacturing
tool manufacturing
aerospace industry
aerospace
aalberts surface technologies automotive
automotive
medical industry
medical

process locations

Any questions? Contact us directly or select a process location near you.

get in touch
HIP | brazing | additive
heat treatment

Letchworth

United Kingdom
51.9887569-0.2038797 info.letchworth@aalberts-st.com +44 1462 472100 show location
heat treatment

Werther

Germany
52.085558.42509 info.werther@aalberts-st.com +49 5203 97405 show location
heat treatment

Gaildorf

Germany
49.01621959.7588191 info.gaildorf@aalberts-st.com +49 7971 96980 show location
HIP I brazing I additive

Goffstown (New Hampshire)

United States
42.9936399-71.5222791 info@accuratebrazing.com (603) 945-3761 show location
HIP I brazing I additive

Greenville (South Carolina)

United States
34.8319956-82.2940535 info@accuratebrazing.com (864) 213-9310 show location
heat treatment

Kalisz

Poland
51.736470518.03159 info.kalisz@aalberts-st.com +48 798 804 003 show location
heat treatment

Kehl

Germany
48.500157.82006 info.kehl@aalberts-st.com +49 7854 96470 show location
HIP I brazing I additive

Manchester (Connecticut)

United States
41.8003737-72.5057255 info@accuratebrazing.com (860) 432-1840 show location
heat treatment

Dunningen

Germany
48.2249668.5003521 info.dunningen@aalberts-st.com +49 7403 92907-0 show location
heat treatment

Eindhoven

the Netherlands
51.47035245.419001 info.eindhoven-heat@aalberts-st.com +31 40 266 3000 show location
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