-Pick up a Smaller tungsten to minimize arc wandering @ low ampere.
-Maintain a very close arc gap.
-Brush it thoroughly until you feel the aluminum "bites" (you found fresh anoxidized alu)
- For 0.75mm Alu I would guestimate @ 30-40 amps.
My problem when i started with aluminum was
1) Dirty Aluminium and in another occasion... painted silver, aluminum !
2) Low current (aluminium sucks the amps like... wow)
3) Too much cleaning, i had the same confusion with the % percentage, had it at 50% or 70% was melting the electrodes and...
I am welding 1.5mm pipe butt-weld with tig, using about 30Amps Autogenous.
Is there an easy-cheap trick to avoid these small black underhangs ?
Of course i could back purge with second argon feed, but i cant do that at the moment.
Or could grind this thing but on pipe its hard to access...
-When you say proper fit up ?
-Because at the tutorial section, says, if you want to have full penetration in a butt weld, you have to have a small gap at the begining. Proper fit up you mean full contact prior to butt welding ?
- This weld is surely with filler. (the other weld at the corner...
Zirconiated tungsten, pointy end grind lenghtwise, with a flat nose. Sand belt for grinding only tungstens. Tried welding an Intake manifold with 120-130A. Lots of oxidation though...
Max frequency is 100hz. I have tried a ceriated 1/16 with thinner items up to 80A-90A. Works a little better...
Hello there
I have welded aluminum with my 1/16 tungsten although the arc doesnt show focused i get a nice weld pool.
But recently i went with a larger tungsten electrode 3/32 for more amperes, but the arc is not visible and it look like it goes here and there.
What are some tricks to...
http://www.mig-welding.co.uk/forum/showthread.php?t=4548&highlight=gloves
You need a pair of thin skinned gloves for tig. That's all. Try tillman gloves and search for your size that fits correctly to your hand (there are online guides you can print and place your hand on it to find whats the...
I was butt welding various thickness inox 304. And especially at thick sections i observed something annoying, the weld puddle had a 5mm lag behind the tunsten electrode. If i was following a circular motion, the puddle was about 2-3 tenths of a second behind.
Although the most important...
One thing i felt it was wrong was my 1.5mm filler rod, which is very much, as it stays on top of the weld, or if let it go hot, it hangs under, with proud top too.
I dont stay too much over the parent metal to add filler, it melts instantly.
The best pass you see in the picture was made with...
I have a question too about the apperance of the weld.
If i am at 40-45 amps 1.5mm stainless and make an autogenous bead, i get good gold and blue weld.
But at the same amperage if i add filler rod, the thing cools way slower and i get gray weld no matter the gas flow, (i am using gas lens...
1mm to 2mm is a great difference.
All i know is that stainless 1.5mm butt weld, likes 43 amps when its stone cold, and after a bead or two wants 40-38 amps.
One thing i have noticed is when adding filler you will get underhangs with such thin metal, try 1mm filler wire. putting 1,6 filler...
Very very nice Tutorial. I think its better and richer than the mig tutorial. Keep it coming ! Next goal is the Tig tutorial !
One thing i didnt know about arc welding is the angle. I didnt know that i had to have a specified angle since it had no gas coverage.
Does your electrode ball up fairly quickly ?
Glowing red is what electrodes do !
My tig glows white but hey, no prob !
I insist that you havent cleaned your aluminium, did you just brushed it ? If its oxidized you'll need more than that.
The arc tries to find the shortest path of good...
Sounds like oxidized aluminium. You get no penetration whatsoever...
Check the balance too but i think this aint your problem because you didnt mentioned any problemns with the tungsten electrode.
To clean your aluminium you must skim at least 0.5mm of metal. Just for a beginners sake.