High heating rates and rapid cooling times.
Advantages of Induction Brazing
Higher Heating Rates
Induction brazing achieves a significantly higher heating rate than furnace brazing. In fact, VPE brazes a variety of assemblies and sub-assemblies where the part temperature increases from room temperature to 1200°C in approximately 11 seconds.
Furthermore, metallurgically speaking, rapid heating may avoid the formation of brittle intermetallics. For instance, titanium brazing may use gold without encountering adverse filler alloy/parent material reactions which happen in the relatively slow furnace-brazing techniques.
Rapid Cooling Times
Extremely rapid cooling times are also possible depending on the ambient atmosphere used. In a hydrogen atmosphere, the cooling rates routinely achieved at VPE are higher than 1000°C/minute.
High Electric Currents
The components to be brazed must be metallic so that suitably high electric currents may be generated from within. It is also possible to use a susceptor for the generation of high currents. The susceptor radiates energy to a nearby non-metallic assembly to effect brazing.