Brazing Furnaces
The Brazing Furnaces ensure consistent brazing results by offering superior temperature and atmosphere control.
Furnace brazing is a metal-joining process whereby a filler metal or alloy is heated to melting temperature above 450 °C (840 °F) and distributed between two or more close-fitting parts by capillary action. The filler metal is brought slightly above its melting (liquidus) temperature while protected by a suitable atmosphere or brazing flux. When the part reaches the liquidus temperature of the filler metal, the filler metal wets a thin layer of the base metal. As the temperature of the part being brazed is lowered to below the liquidus temperature of the braze alloy, the part being brazed is cooled rapidly to form a brazed joint. By design, the melting temperature of the braze alloy is lower than the melting temperature of the materials being joined. Furnace brazed joints are generally stronger than the individual filler metals used due to the geometry of the joint as well as to the metallurgical bonding that occurs.
Advantages
There are varied reasons which makes furnace brazing preferable over other brazing methods.
- Furnace brazing is highly repeatable and capable of high quality
- Furnace brazing is a semi-automatic process used due to its adaptability to mass production
- Furnace brazing process relies on the use of semi skilled labor is practical and cost effective
- Furnace brazing 's main advantage is the ease with which it can produce large numbers of parts per hour
- Furnace brazed parts are uniformly heated under tight process control
- Furnace brazing offers simultaneous joining of multiple braze joints is usual
- Components to be furnace brazed can be designed for self alignment without the need for fixturing.
- Furnace brazing allows for Braze Filler Metal [BFM] to be preplaced in contact with the braze joints
- Furnace brazing has a controlled heat cycle minimizes or eliminates distortion.
- Furnace brazing eliminates the need for post braze cleaning operations
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