[TheForge] cast iron welding

Fri Mar 19 06:14:00 2004

        Larry,  this is interesting as I'd always thought that mig wouldn't
work on cast until last month.
        I was going over mig welding process with a junk yard metal sculptor
and we did some experimenting. I took a cast iron stove door and welded test
samples to it with the mig welder using:
    1)stainless wire
    2)hard wire
    3dual shield
Then brazed on a similar sample
and then Tig welded another sample to the door with a stainless rod.

        I found the braze broke first on destructive testing, the hardwire
after that, then the rest were about the same...........I had to pry the
sample back and forth until it pulled half the cast door apart to get it
off.
        I was rather impressed with the ability of mig to hold cast as
well - but it certainly worked well.
        I used preheat and post heat as well..........there were tension
snapping noises as it cooled, but it didn't come apart, and was really hard
to remove the samples.
        We came to the conclusion that it was alright to do for sculptural
work as long as something was not structural in supporting the piece or in
high winds in acting like a sail.
        I didn't even try the nickle rods with the arc welder, as I know the
results of those.

Ralph
----- Original Message -----
From: "Larry Ruebush" <[email protected]>
To: <[email protected]>
Sent: Thursday, March 18, 2004 10:14 PM
Subject: Re: [TheForge] cast iron welding


> Michael
> I have repaired several exhaust manifolds using a wire feed mig. Start a
> fire[wood] and put the manifold in it. Let the manafold get good and hot.
> Take it out and weld it with the mig. Put it back in the fire, cover the
> fire [I use a old hood] and leave it there until the fire is out and the
ash
> is cool. Have had good luck with this. Yes, I know that mig isn't suppost
to
> work with cast, but I have had success.
> Larry Ruebush
> west central IL
> ----- Original Message -----
> From: "Michael H Murphy" <[email protected]>
> To: <[email protected]>
> Sent: Thursday, March 18, 2004 7:00 PM
> Subject: RE: [TheForge] cast iron welding
>
>
> > I'd like to get some pictures and a bit more info on this one.  I
recently
> > tried to repair a tractor manifold for a friend, without any success.
Can
> > you pass on any specifics on where to find this stuff?  I'd appreciate
it.
> >
> > Mike Murphy
> > [email protected]
> >
> >
> > -----Original Message-----
> > From: [email protected]
> [mailto:[email protected]]
> > On Behalf Of Bruce Freeman
> > Sent: Thursday, March 18, 2004 8:37 AM
> > To: [email protected]
> > Subject: Re: [TheForge] cast iron welding
> >
> > I'm no expert, but we did some comparable work on cast iron anvils
> > recently - "buttered" them with nickel rod, then welded on steel to
> > replace broken parts of the steel plate.  Seems to have worked quite
> > well.  Lower investment cost if you already weld.
> >
> > Bruce
> > NJ
> >
> > >>> [email protected] 3/18/2004 1:18:22 AM >>>
> > To-day I witnessed a demonstration on building up cast iron with a Ni
> > spray.A torch is the method of delivery. A bottle of Ni (nickel)was
> > screwed into this custom set-up.
> > 11# of acetylene 20# oxy. The torch has a trigger, when pressed the
> > powder comes out with the flame. The torch tip looks like a welding tip
> >
> > with a O2 trigger on it.
> >
> > The piece was one half of an old crank style blower. One of the ears
> > was
> > broken off where the two half s screwed together. First the piece was
> > heated up to about 400* F. Then this slick
> > torch started to do its thang. The end product is a brandy new shiny
> > tab. He wanted $ 500.00 for the set-up. I can post pics if you want to
> >
> > see the process. I thought it was rather pricey.
> > If I did lots of cast welding and happen to have 500 clams I'd have
> > one.
> >
> > Kenny O
> >
> >
> >
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