Brazing
It is a low temperature joining process.
It is performed at temperatures above 840º F and it generally affords strengths comparable to those of the metal which it joins.
It is low temperature in that it is done below the melting point of the base metal.
It is achieved by diffusion without fusion (melting) of the base.
Depending upon the method of heating, brazing can be classified as.
- Torch brazing
- Dip brazing
- Furnace brazing
- Induction brazin
Advantages.
- Dissimilar metals which canot be welded can be joined by brazing.
- Very thin metals can be joined.
- Metals with different thickness can be joined easily.
- In brazing thermal stresses are not produced in the work piece. Hence there is no distortion.
- Using this process, carbides tips are brazed on the steel tool holders.
Disadvantages.
- Brazed joints have lesser strength compared to welding.
- Joint preparation cost is more.
- Can be used for thin sheet metal sections.
Soldering
It is a low temperature joining process. It is performed at temperatures below 840ºF for joining.
Soldering is used for,
- Sealing, as in automotive radiators or tin cans.
- Electrical Connections.
- Joining thermally sensitive components.
- Joining dissimilar metals.
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