Welded a Cat 650 Dozer stack (MIG)

[CNC Dan]

I've got to the point where all I use is 2% ceriated tungsten. And yes it stays sharp all the time.

I've done the same with2% lanthenated. Been meaning to try ceriated.

 

[Sodo]

Ditto. That is going to be miserable to run with the exhaust coming out of the holes.

Dusty that's not how it worked out. Even when he Rolls Coal , nothing comes out the slits.

Happy to finally get time to make this clearing. 4 hours later it's like getting free land!

 

[MtPockets]

Looks like good!

 

[Sodo]

I've got to the point where all I use is 2% ceriated tungsten. And yes it stays sharp all the time.

I've done the same with2% lanthenated. Been meaning to try ceriated.

I got BOTH. LWS guy said the grey is recommended with my inverter machine, and the TIG kit came with 3 greys, 3/32". Cant remember if grey is lanthanated or ceriated. LWS said the differences are very subtle.

I have everything except my MultiMatic is 100 miles away. Any tips on the best YouTube to start with?

 

[Mysfyt]

Welding Tips and Tricks - TIG, MIG, Stick and a pantload of other info

I would start here. Some of the best welding videos out there.

 

[Shield Arc]

Any tips on the best YouTube to start with?

A guy with your superior welding skills should not mess around with rudimentary Tig welding. Jump right into open root pipe.
https://www.youtube.com/watch?v=2chtZErrZzg
https://www.youtube.com/watch?v=cGoybWZjSis

 

[CNC Dan]

Welding Tips and Tricks - TIG, MIG, Stick and a pantload of other info

I would start here. Some of the best welding videos out there.

+1

He has the welding skills AND video skills.

 

[Silvic]

A guy with your superior welding skills should not mess around with rudimentary Tig welding. Jump right into open root pipe.
https://www.youtube.com/watch?v=2chtZErrZzg
https://www.youtube.com/watch?v=cGoybWZjSis

SA
Yes I know you are not a pipe welder but.........
The first video of the 2G by Welders Lens (Treadway) looked like he had a very thick land on the pipe. I would have expected to see a bit thinner land on that. Not a knife edge, but that looked more than I expected. Maybe an optical illusion what is your opinion?
Thanks

 

[Shield Arc]

I use about 1/16" land, and a 7/64" drill bit to set the gap. I use 1/8" filler for the root pass. I use 3/32" filler for the hot pass. I do not go up more than 10-amps for the hot pass! This helps prevent suck back! I run about 95-amps. With a very long sharpened tungsten. Most of the time I use the lay rod technique, but I have been known to dip the filler too.

 

[Sodo]

Always thought I'd watch videos but never could really pay attn to TIG because I had no EQPT to apply it to. Man those guys are GREAT teachers. Really looking forward to TIG. I've done a lot of gas-welding (but not in 20 years) and always wanted a TIG. Wish I could wind the clock back and get a TIG 20 years ago.

One thing that struck me is that this TIG puddle (& bead) appears to have a very little "penetration" into the parent metal. It seems to me (on a theoretical level) like all you'd have to do is penetrate one molecule into the crystalline structure, and two pieces become one (ignoring flaws for the moment). I understand there can be a grain structure that differs at the edge of the melt. But what is it - that is different - between a low-power MIG weld and this tiny TIG root weld? Isn't this guy welding with 95A? That's not a lot of power going into that parent metal.

I have no doubt this is stronger, and better result. But what's the deal with penetration? Does penetration come into focus with MIG simply because MIG is crude and un-controlled?

This is probably too much detail to discuss in a thread called …..dozer stack (MIG)