I am a newbie TIG welder. I orginally learned to gas weld for the purpose of building an airplane. Most of the welding is in thin wall,4130 steel tubing. After learning to gas weld, I then decided that I might like to do the welding with TIG and so took a 2 day TIG course about 6 months ago. I finally got a TIG welder and have been practicing for the past week. I'm sure I forgot most of what I learned in the 2 day course, but some of the welds look decent.
I have placed a few pictures of my welds atHere are the details: All flat plate welds are in 1/16in 4130. No cleaning of the metal was done as it was already pretty clean The tube welds are in 0.050 wall 4130 tubing. The tubing was cleaned using a wire wheel in my bench grinder followed by whiping with Acetone.
Tungsten: 2% thoriated, 1/16 in Cup: #6 Gas Lens Flow: 10-12 CFH Argon Rod: ER80S-D2, 1/16 in
Amperage: Butt Welds: 50 amps LapWeld1: 60 amps LapWeld2: 70 amps Fillet Weld: 80 amps TubeWelds: 50 amps
I know that the tube welds are not very pretty. I am having problems with blowing holes in the connecting tube. TubeWeld2 had several bad holes in it. I'm finding that TIG does not provide as much warning as gas does when it is about to make a hole.
So, what do you think? Any advice? Anything you see wrong that should be corrected? The tube welds seem to be more contaminated than the flat welds. Is there more cleaning that I need to be doing?
How come the butt and lap welds have little star patterns in the weld, and the fillet looks smooth? Is there anything wrong with either?
Thank you for any advice that you can give