The filler metal is brought slightly above its melting ( liquidus ) temperature while protected by a suitable atmosphere, usually a flux.
22.
The filler metal should be added quickly, and a large weld pool should be avoided to prevent dilution of the base materials.
23.
When the filler metal is properly added to the molten puddle, the resulting weld will be stronger than the original base metal.
24.
After the joint cools there is a joint line consisting filler metal and the metal of the two pieces that have been joined.
25.
Welders often develop a technique of rapidly alternating between moving the torch forward ( to advance the weld pool ) and adding filler metal.
26.
According to Ambrell Group Application Labs talking about filler metals : Silver is frequently used for induction brazing because of its low melting point.
27.
One of the main disadvantages is : the lack of joint strength as compared to a welded joint due to the softer filler metals used.
28.
The strength of the brazed joint is likely to be less than that of the base metal ( s ) but greater than the filler metal.
29.
Particularly thick plate will have a " J " shaped chamfer or " U " shaped groove to reduce the amount of welding Filler metal used.
30.
Complex joints, typically for jewellery or live steam boilermaking may be made in stages, with filler metals of progressively lower melting points used in turn.
