Hard- and high-temperature vacuum brazing is a joining technology which can be used to produce firmly bonded connections and to join complicated geometries or rather several joints simultaneously.
An almost unlimited range of materials can be used (base materials and brazing alloys)
Minor distortions due to an even furnace heating
Very good joining quality due to the vacuum atmosphere
High strength, even at high operating temperatures
Avoidance of fluxes
High reproducibility due to excellent temperature uniformity and comfortable control of modern furnace systems, including the process documentation
Possibility of a combined heat treatment (brazing and hardening)
Large-scale components can be joined
No oxidation and annealing colour
Hardening and annealing can be integrated into the process
Low environmental impact
Mostly batch processes with single batches. A continuous production is only possible with a very complex manufacturing facilities
Eventually high effort to fix components as components cannot be manipulated in the furnace
The whole component is heated, leading to a decrease of the hardness with already quenched and tempered materials or work-hardened materials
High investment costs