Hi Richard,

Pictures attached.

Thomas

Hi Gentlemen, Finally we have made substantial progress with the lack of penetration at the weld start (actually, overlapping the weld start). First we changed the shielding gas from argon to a mixture called NAVY that is 30% argon and 70% Helium. This improved the penetration without the side effec...

Thomas, welcome to the forum So either increasing the amps at the start, and/or start the arc, and wait a short period of time before you begin the rotation. Either way you need to get penetration before you start moving. We used to use high purity argon in the chamber, and then mix the helium in t...

In lieu of increasing the amperage at the start, I would suspend adding filler for the initial 25mm rotation. Then, when you come to the "overlap" the 65 amps in only heating the base metal for filler addition, not the base plus the initial weld with filler. Essentially, you are reducing ...

I know almost nothing about titanium and automation, but I think that if you experiment with different angles on your tungsten electrode and different arc gaps, you may achieve satisfactory results. Any particular reason for the argon /helium mix? Straight argon is more common. Hi Mike, Thanks for ...

Gentlemen, I am doing an automated (circunferential) TIG weld on Titanium alloy. The weld is done inside a chamber that is filled with Argon(30%) and Helyum(70%) so that the shielding is superb (<10 ppm O2) . Wall thickness is 2mm and the joint edges are machined in such a way that they provide some...