I want to try some brazing with my TIG torch when the appropriate filler rods arrive in a few days. I've read some of Ernie's great posts from last year (copied below.)
One question remains in my mind. How do I begin the process? In TIG welding I melt some of the base metal and then dip the filler into that puddle. When starting to braze, do I begin by melting the filler directly with the arc, or heat the metal a bit and then try to melt filler with that heat, or ??
Thanks for any further advice.
--parts of Ernie's posts-->
TIG Braze-welding uses the exact same motion as TIG WELDING. You are not flowing the bronze into the seam with a washing technique, you are laying in a weld bead using bronze.
So act just as if you are TIG welding, but use half the amps.
This will only work with Silicon bronze, Nickle bronze or Manganese bronze filler.
Low fuming bronze gas brazing rod will not work. Sil-phos can work, but it tends to flow too much.
No flux is used for this.
It is performed in a forehand "pushed" direction.
DCEN for arc control. Cleaning action is not needed here.