Welding Aluminium On Dc Tig. This is a problem that Alternating current solves. In a TIGs case aluminum is always welded with AC current because of a special property of aluminum alloy that has a problem with melting point.
Aluminum tends to be less forgiving and there are some simple steps you can take before during and after the weld that can help you successfully weld aluminum. TIG Welding Aluminum on DC by bryce39 Sun Oct 14 2012 309 pm Sure this setup for 14 aluminum plate was run with DCEN with a gas lense 332 2 thorated tungsten sharpened to. Thick aluminum parts where distortion limitations are tight large aluminum parts that would otherwise need to be preheated tack welding thick aluminum to prevent cracking of tack welds.
So some applications for tig welding aluminum using DC are.
Doing so will give you burn-throughs and result in weak or ugly welds. When TIG welding aluminium AC or alternating current is used due to the alternating current having positive and negative cycles. For my testing I used TM Technologies Premium Aluminum Gas Welding Flux. This is a problem that Alternating current solves.