I have had really good results tig welding cast iron using AC and Aluminum bronze filler rod. ( thats ErCu-Al-A2)
But only on cast iron that does not operate at high temperatures like exhaust manifolds.
On those type jobs, there are better filler metals that more closely match the expansion and contraction of cast iron.
Nickel rods and even stainless have been used on exhaust manifolds successfully but those type parts can be a crap shoot.
This video shows a simple repair on a cast iron vise.
I have another repair to do where a larger vise cracked from someone cranking on a cheater bar and I will post that video as soon as I get it welded.
Questions about AC balance, AC frequency, tungsten electrodes, shielding gases, techniques for feeding wire, how to keep a tight arc without dipping in the puddle, and a lot more.
While I figure out the best way to answer as many questions as possible, I have to start by answering just a few of t...
The current waveforms are advanced square wave, soft square wave, sine wave, and triangle wave.
They all have slightly different looks, sounds and characteristics.
Some waveforms are supposed to be better for thin metals, others for thicker metals.
There is another advanced feature on a very few...
American Welding Society AWS D17.1 is the specification for Aerospace Fusion Welding Applications. This Specification provides details for welding certification as well as production welding.
A typical test required to certify a welder in aluminum is the 2f tee fillet weld test.
