Bubbly weld what gives?
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    Kbar's Avatar
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    Bubbly weld what gives?

    Boys are mig welding in the shop and getting bubbles/holes in the bead



    Not enough gas? Steel too cold?

    Once in a while it does this cheese wiz deal. Need pro advice


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    I ain't there,, but,,,

    if I were to guess,,
    either gas flow rate,, or torch angle is causing the gas flow to suck air (oxygen) into the weld puddle,,,

    BINGO,, porosity,,,
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    Captain Hook Kennyd's Avatar
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    Definitely gas related, what CFH are you running? I find 25 is a good number for my older Miller 210 and my current 252.
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    First guess would be gas coverage, it looks clean enough to weld better than that. If the surface under the plate you're welding on is dirty, it can pull bad stuff from there.

    I'd have someone watch the gauge as you actually weld, not just what you set it at. I had one regulator that would show 20cfh and then drop to 10 after about an inch of welding. Took calling a friend over to figure it out, he saw the needle drop when I started cursing the puddle getting bad.
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    Bubbly weld what gives?

    Are you using the correct shielding gas? I use C25 for almost all of my welding. It’s pretty universal and flexible. If you were using straight Argon, you’d get those porosity issues.
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    glc
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    Maybe forgot to turn the gas on!
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    Quote Originally Posted by glc View Post
    Maybe forgot to turn the gas on!
    Or maybe it’s not making it to the puddle thru the hose, something not connected?
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    as mentioned its a gas problem......also have seen this with guys that are welding outside in wind...or with a fan blowing on them.......one of the reasons i prefer fluxcore is i like to have a fan on me when i weld
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    Turned the gas up to 25 and it does better. They were dipping the tip in that anti slag gel so cleaned it and use more gas seems to work




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    Quote Originally Posted by dieselshadow View Post
    Are you using the correct shielding gas? I use C25 for almost all of my welding. It’s pretty universal and flexible. If you were using straight CO2, you’d get those porosity issues.
    A real weldor can MIG weld clean steel with straight CO2 and not get porosity like that. Maybe the spatter is a little worse but the welds are just as good as with C25.
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