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  1. #1
    Join Date
    Jan 2007
    Location
    Montana
    Posts
    64

    Default My 2nd Try At Aluminum Your Thoughts ?

    I am taking a TIG welding course at the University I am really enjoying it ! this is my 2nd try at aluminum it getting better but I have a long way to go.

    The first attempt was scary.


    Give it to me straight what should I be doing ?

    The Instuctor is Great, He is very helpful.

    I just wanted some more ideas of what I I need to do to improve.

    I am trying diffrent setting to see how it changes things Freq & balance

    These plates were done quickly no cooling They warped pretty badly.

    3/32 Aluminum
    Dynasty 200DX
    105-120 Amps
    1/16 Pure Tungston
    3/32 Rod 4043
    Balance 65% en
    140HZ Freq
    Argon 15 CFH

    Any tips on the set up for 3/32 Aluminum ?
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  2. #2
    Join Date
    Mar 2007
    Location
    Deltaville, VA
    Posts
    2,239

    Default

    Not bad for your second go at aluminum.

    Consistency comes with practice. Aluminum likes to be run hot and fast.

    Biggest thing I'd recommend is "lose the pure tungsten" on an inverter. The Dynasty 200 will perform better with Ceriated or 2% Lanthanated tungsten. Miller does not recommend the use of pure with the Dynasty's.

    If you're using 3/32 filler, I'd recommend moving up to the 3/32 tungsten for AC welding. May also want to try increasing the balance to 75-80% if the material is clean. You want the etch zone (from the cleaning) to extend just past the puddle.

    May also try dropping the HZ back to about 120 for the coupons you're running.
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  3. #3
    Join Date
    Jul 2009
    Location
    St. Paul, MN
    Posts
    94

    Default

    Quote Originally Posted by SundownIII View Post
    Not bad for your second go at aluminum.

    Consistency comes with practice. Aluminum likes to be run hot and fast.

    Biggest thing I'd recommend is "lose the pure tungsten" on an inverter. The Dynasty 200 will perform better with Ceriated or 2% Lanthanated tungsten. Miller does not recommend the use of pure with the Dynasty's.

    If you're using 3/32 filler, I'd recommend moving up to the 3/32 tungsten for AC welding. May also want to try increasing the balance to 75-80% if the material is clean. You want the etch zone (from the cleaning) to extend just past the puddle.

    May also try dropping the HZ back to about 120 for the coupons you're running.
    Well said. I couldn't agree more

  4. #4
    Join Date
    Feb 2009
    Location
    Maryland
    Posts
    707

    Default

    May I also suggest you draw a line and follow that. Make sure your torch hand slides easily along that line. I find that what I think is a perfectly straight and parallel line under the hood is a meandering trail once everything is cooled down.

    As for frequency. Somethings not right. Running higher frequency tends to get better penetration and ultimately narrower bead. I would think with beads that wide you would have had burn through. With higher frequency I find the sweet spot as far as power goes is tougher to maintain. Puddle goes from too small to burn through to easily. I find run 60Hz, or 80Hz much more forgiving (at least on the thin stuff). This is purely from my observation - and I'm no expert, just an experimenter - with a few small home projects under my belt.
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