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Unread 03-17-2014, 09:10 PM   #1
Machinist
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Tig welding question

I am new to tig welding so bear with me,being so new I will need a ton of practice and I know that.What I am wondering is say I make tac welds with a mig can I go through and TIG weld them after or will the area e "contaminated" to much to tig weld it after?

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Unread 03-17-2014, 09:21 PM   #2
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What type of mig? Flux will interfere with your TIG setup. I pretty much TIG everything we do at work. I would go for it and see, personally I prefer the TIG to all other welding processes anyways.
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Unread 03-17-2014, 10:01 PM   #3
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Miller 211 running mix gas.I will do a few tests tomorrow and post up some pics.Just started tig welding so don't laugh to hard!!lOL
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Unread 03-20-2014, 07:23 PM   #4
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You can tack with a mig and then tig over top of it when you go to finish the weld with no issues. Flux core welding isn't mig welding meatlord. Not trying to be an ***, I just don't want any confusion for the OP.
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Unread 03-20-2014, 07:26 PM   #5
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Quote:
Originally Posted by Kenbo-Slice View Post
You can tack with a mig and then tig over top of it when you go to finish the weld with no issues. Flux core welding isn't mig welding meatlord. Not trying to be an ***, I just don't want any confusion for the OP.
I have used many wire feed setups with flux core wire on the same machine without the gas. Guess I did not specify that.
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Unread 03-20-2014, 08:36 PM   #6
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Yea I did it the other day and didn't see any problems.I actually took some .045 mig wire and ran a tig weld with it tonight just to see.Worked decent enough for me right now
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Unread 03-21-2014, 05:59 PM   #7
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I've TIGed over MIG tacks, doesn't seem to be a problem. I imagine you could probably TIG over a flux core tack as well, so long as you chip off all of the slag and wire wheel/brush it good? I've not tried it though.
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Unread 03-23-2014, 09:30 AM   #8
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Quote:
Originally Posted by Machinist
Yea I did it the other day and didn't see any problems.I actually took some .045 mig wire and ran a tig weld with it tonight just to see.Worked decent enough for me right now
Here's a trick I've seen before: if you're out of tig rods, take a length of mig wire, fold it in half and twist it up tight with a drill. Bam tig rod in a pinch.
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Unread 03-23-2014, 10:38 AM   #9
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Quote:
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Here's a trick I've seen before: if you're out of tig rods, take a length of mig wire, fold it in half and twist it up tight with a drill. Bam tig rod in a pinch.
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Unread 03-26-2014, 06:59 PM   #10
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Quote:
Originally Posted by AtTheHelm View Post
Here's a trick I've seen before: if you're out of tig rods, take a length of mig wire, fold it in half and twist it up tight with a drill. Bam tig rod in a pinch.
Wire hangers work shockingly well too. They are made out of such a mishmash of metals that they work on damn-near anything in a pinch. I personally wouldn't do any critical welding with one but for an at-home repair or an emergency they are great. Try running a few beads with one for S+G's.
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Unread 03-31-2014, 10:53 PM   #11
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Originally Posted by Kenbo-Slice View Post
Wire hangers work shockingly well too. They are made out of such a mishmash of metals that they work on damn-near anything in a pinch. I personally wouldn't do any critical welding with one but for an at-home repair or an emergency they are great. Try running a few beads with one for S+G's.
They are pretty hard and usually have that nasty coating on them. Why not bailing wire instead? Crappy steel also but no coating and softer.
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Unread 04-02-2014, 10:58 PM   #12
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A friend uses his torch rig to take that nasty coating off of coat hangers when he needs one. Just get it red hot for a second but don't breath the fumes as who knows what that stuff is??? Probably OK for general repairs but not structural welds IMHO. We mainly use ER-70S & ER-80S rods on 4130 metals.
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