Brazing is a metal-joining technique wherein a filler metal is used to join two or more materials by drawing it into the joint by capillary action. A filler metal is a material with a melting point lower than that of the materials to be joined. Vacuum Brazing is a process that creates high-quality joints under temperatures from about 550°C to 1150°C in a vacuum atmosphere. This also allows for the joining of different materials.

Process:


Vacuum brazing is a joining process used to connect materials, typically metals, through the use of a filler metal called a braze alloy. This method involves heating the base metals and the filler metal in a vacuum environment, where the absence of air prevents oxidation and contamination, ensuring a clean and strong joint.

plasma

Advantages of Brazing over Welding:

  • Base metals never melt, thus enabling close tolerances and joining materials neatly without going for secondary finishing
  • Homogenous heating of components reduces thermal distortion when compared to welding
  • Suitable for cost-efficient joining of complex and multi-part assemblies as brazing can easily join non-metals and dissimilar metals

Vacuum Brazing is far superior to Conventional Brazing:

  • Extremely clean
  • Flux-free braze joints with high integrity and superior strength
  • Improved temperature uniformity
  • Lower residual stresses owing to slow heating and cooling cycle, resulting in dramatically improved mechanical and thermal properties of the material
  • Age hardening or hardening heat treatment of the work piece is part of the metal-joining process, but all in a single furnace cycle

Filler metals used:

Copper, Nickel, Silver, Aluminium

Application Industry:

  • Agriculture
  • Defence
  • Power Generation
  • Oil & Gas
  • Nuclear Power Generation
  • Medical Devices
  • Cutting Tools