Vacuum Brazing

Bluewater Thermal Solutions Vacuum Brazing method employs a heat treatment procedure in which metal assemblies are placed in a vacuum or chamber below atmospheric pressure. The assemblies are heated under vacuum so that the filler material utilized dispenses via capillary means into the joint between the base metals to be coupled. The filler material being discharged has a melting point lower than those base metals being joined. Depending on the characteristics of the metals being brazed in Bluewater’s Vacuum Brazing method, the vacuum will often necessitate a gas atmosphere in order to enhance the vacuum brazing process.

Vacuum Brazing Properties:

  • Produces stronger metal joints than other methods of brazing
  • Can eliminate the need for finishing treatments
  • Creates Leak tight joints
  • Provides bright and sanitary parts due to the low amount of oxygen present
  • Flux-free
  • Can be used on complex and simple parts
  • Can be used for single parts or on a high-quantity of parts
  • Reduces distortion through the use of uniform heating
  • Reduces residual stresses often caused by slow heating and cooling
  • Typically heat is transferred by means of radiation

Vacuum Brazing Applications:

  • Useful in situations where base metals are processed that react adversely with other atmospheres
  • Useful in scenarios where entrapped fluxes or gases are intolerable to the materials being brazed
  • Can be used to braze stainless steel, super alloys and carbon, low alloy steels
  • Ideal for parts that are oxidation sensitive
  • Aerospace and medical parts
  • Fuel nozzles, heat exchangers, food processing equipment and stainless steel
  • Ideal for parts which require high standards of cleanliness
  • Ceramic to metal parts, metal to composite parts, and metal to metal bonding

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