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Old 06-04-2006, 01:51 PM
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Default Hows this weld bead?

This was a coupon that i tacked together a bit to far apart for the .23( i think it was) so instead of retacking it i sort of pulsed it by hand so i didnt burn threw. Yea its done with mig.
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Old 06-06-2006, 06:02 PM
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Interesting... I didn't know you could do that. Looks like the only drawback may be cold restarts and uneven penetration. Not to say that's bad. It's much better than I would have done... kept chasing it until the whole thing is vaporized, LOL!
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Old 06-06-2006, 08:14 PM
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Rocket, I am not sure I understand what you mean;
are you saying you used .023 wire or that the coupon is .023" thick?
I can't believe that the coupon was actually .23" thick.
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Old 06-06-2006, 09:52 PM
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I would have used a circular weave instead of pulsing. Lots of cold starts is usually what the trigger pulsing gets you. If done right, it may not matter. A post mortem of a destructive test is the only way to tell. though.
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Old 06-06-2006, 10:43 PM
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once you get the hang of it its possible to bridge some pretty far gaps with a mig and still have a decent looking weld. Just plow on the sides with a weave or small circles and the middle will fill in all on its own. Stay out of the middle too much or you will blow though.

and if its too much to bridge remember stringers are AOK
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Old 06-06-2006, 11:32 PM
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Quote:
Originally Posted by cutter
Rocket, I am not sure I understand what you mean;
are you saying you used .023 wire or that the coupon is .023" thick?
I can't believe that the coupon was actually .23" thick.
I was using .23 wire. the coupon was 3/32 i think.
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Old 06-06-2006, 11:39 PM
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Quote:
Originally Posted by rocketeir
This was a coupon that i tacked together a bit to far apart for the .23( i think it was) so instead of retacking it i sort of pulsed it by hand so i didnt burn threw. Yea its done with mig.
I wouldn't call what you did pulsing, you just strung a bunch of tacks together and as long as you do not neet to meet D1.1 or D1.5, that isn't neccesarily a bad thing. On thin gauge steel you get plenty of penatration, on thicker materials (I'd say 11 gauge and up) you will start loosing weld quality so it is a habit best not delevoped.
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Old 06-24-2006, 10:42 PM
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Bumping the trigger like that is not a good habit to get into.. You should have just turned the heat and wirespeed down where you could weld it without stopping.

The result, doing as you did, is a bunch of fisheyes...which will have microscopic or larger) cracks all in them. Although this weld may hold your weight on it, putting it in a boiler or place that it's very important and/or exposed to a lot of vibration would be a definite mistake.
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