[TheForge] Brooms and Welding Cast

[Tod Estes]

Aubrey,
Did you preheat,post heat? inquiring minds wanna know.
> Greetings All,
>
> For those who were following the cast iron welding discussion from last
> year, here is an update.
>
> I was repairing a broken cast iron part on my old Acme post drill; the arm
> that advances the down-feed of the spindle.  It had broken at least twice
> before near the pivot hub.
>
> I chose to oxy-acet. weld using Welco cast iron filler rod and flux.  The
> welding went okay, after I got used to the very liquid puddle of cast
> iron.  My weld included part of a previous weld using unknown filler.  The
> biggest problem I ran into was porosity in the previous weld.  In
> retrospect, I probably should have ground out all of the old weld, but
> that was a lot of material.
>
> In any case, the new weld seems to be strong and I have put the part back
> into service.  I would conclude that this is a very viable alternative to
> brazing and nickel welding for small cast iron parts.
>
> Thanks for all of your advice and consultation.
>
> Aubrey
>
>
>
> ________________________________
>
> From: theforge-bounces at mailman.qth.net on behalf of Peter Fels And Phoebe
> Palmer
> Sent: Fri 12/16/2005 7:41 PM
> To: Sponsored by ABANA
> Subject: Re: [TheForge] Brooms and Welding Cast
>
>
>
> Aubry: If you are repairing a bar like piece rather than a plate
> or wheel, the effects of thermal distortion matter a lot less and
> you can be much looser about pre and post heat. Brazing ought to
> be the easiest and quickest in that case...just don't overheat
> the cast before you lay the brazing rod on a well fluxed surface...PF
>
> frosty at customcpu.com wrote:
>> I understand, I have a couple post drills and know just what you're
>> repairing.
>>
>> I wasn't saying you should stick weld it. I was saying I've never gas
>> welded
>> cast so I'd probably stick weld it but that's what I know how to do for
>> sure.
>>
>> I might braze it too but I don't have it in hand so I can't say.
>>
>> One thing for certain, I'd forge or fab the replacement first. Just like
>> you.
>> <grin>
>>
>> Frosty
>>
>> Quoting "Washington, Aubrey O." <awashington at ou.edu>:
>>
>>
>>>Frosty,
>>> The piece I'm going to weld is more like 1/2 X 1" bar stock rather than
>>>plate.  So I think gas welding should go okay.
>>>
>>>Aubrey
>>>
>>
>>
>>
>>
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Tod Estes
Oologah Smithy
Oologah,Oklahoma. (Home of Will Rogers.)
Saltfork Craftsmen ABA, ABANA
Time enough for sleep in the grave.

"Prometheus: I took from man expectancy of death.
Chorus: What medicine found'st thou for this
        malady?
Prometheus: I planted blind hope in the heart of
           him.
Chorus: A mighty boon thou gavest there to man.
Prometheus: Moreover, I conferred the gift of fire
Chorus: And have frail mortals now the flame-
        bright fire.
Prometheus: yes, and shall master many arts
            thereby."