[TheForge] disintegrating welding rod

[Darrell]

The other option is to treat the TIG weld as a tack and flux and forge weld
the part.
Darrell

http://www.machinemaster.com
----- Original Message ----- 
From: "David E. Smucker" <davesmucker at hotmail.com>
To: "Sponsored by ABANA" <theforge at mailman.qth.net>
Sent: Thursday, December 23, 2004 2:16 PM
Subject: Re: [TheForge] disintegrating welding rod


> I don't think so Bruce.  Welding rod / wire it very tough in almost all
> cases -- alloy content is controled so that it is not "hot short" in my
> terms.  I have used many tig welds in forging applications and have never
> had them fail.  I think this failure is most likely a lack of penataration
> with unwelded metal at the root.  This will cause problems just like a
cold
> shunt.  A weld in this type of application needs to be a full depth groove
> or V weld.  You want to go into the fire with 100 percent metal -- not
> something with a crack that will just grow under forging.
>
> Dave
> ----- Original Message ----- 
> From: "Bruce Freeman" <FREEMAB at pt.fdah.com>
> To: <theforge at mailman.qth.net>
> Sent: Thursday, December 23, 2004 10:35 AM
> Subject: Re: [TheForge] disintegrating welding rod
>
>
> > Contribution from a non-weldor:
> >
> > Is it possible that a weld bead could be red-short?  Electric welding
> > is a melting operation, so it's not clear to me that red-short wire or
> > rod would be a disadvantage there.  Clearly, such a material would fall
> > apart when forged, however.
> >
> > Bruce
> > NJ
> >
> >>>> sunironworks at yahoo.com 12/23/2004 10:07:16 AM >>>
> > Yeah, I thought so too. Could be I got some gunk in there or like you
> > say the different harndesses made a difference. And Ralph's suggestion
> > that the mechanical distortion caused by heating (especially on a
> > weldment that's of a different hardness or grain stucture than the
> > base) is a pausible addition. I'll play with different welds and rods
> > and see if i can learn something. I have to fix this problem on this
> > particular bar this morning, so I'll tig it up again--carefully, with
> > good penetration and cleanliness--normalize and see what happens.
> >
> > Thanks and happy holidays all,
> >
> > JRF
> > --- Peter Fels And Phoebe Palmer <artgawk at thegrid.net> wrote:
> >
> >> In theory, TIG welds should be the least susceptable to that
> > problem.
> >>
> >> I've found that running the weldment through a normalizing cycle
> >> first
> >> helps...PF
> >>
> >> TodEstesRN at aol.com wrote:
> >>
> >> >In a message dated 12/21/2004 6:29:52 PM Central Standard Time,
> >> >xlch58 at swbell.net writes:
> >> >Justin Fellenz wrote:
> >> >
> >> >
> >> >
> >> >>All,
> >> >>
> >> >>I've been finding that electric welds, especially tig,
> > disintegrate
> >> in
> >> >>the forge. Last session I cheated and tigged a couple of pieces of
> >> bar
> >> >>together rather than forge-weldng them. I used a general purpose
> >> mild
> >> >>steel gas welding rod (probably RG-45, copper coated) and 2 1/2"
> >> round
> >> >>bars of 1018 or 1020, or, my supplier said, maybe a38. I cleaned
> >> the
> >> >>rods up with a flap wheel, beveled the edges, and burnt em
> >> together.
> >> >>Looked like good penetration,a little sparking from junk on the
> >> metal
> >> >>but not too bad. But when I heated it up and beat on it with a
> >> hammer,
> >> >>the filler just sort of diappeared leaving gaps between the bar
> >> ends.
> >> >>
> >> >>Maybe I didnt get it all the way clean and carbon or scale
> > deposits
> >> or
> >> >>whatever heated up and blew the filler or the HAZ metal out. My
> >> best
> >> >>guess. Anyone else experience this? I find that mig welds hold up
> >> ok as
> >> >>long as the penetration's really good, but where it's not it looks
> >> like
> >> >>the HAZ again just kind of powders and the bead pulls away from
> > the
> >> >>bar.
> >> >>
> >> >>Thoughts?
> >> >>
> >> >>Cheers,
> >> >>
> >> >>JRF
> >> >>
> >> >>
> >> >Don't know why that happened but have had good luck Oxy/Acy gas
> >> welding then
> >> >forging.
> >> >
> >> >
> >> >Time enough for sleep in the grave.
> >> >Tod Estes
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