[TheForge] Welding cast iron

[Tod Estes]

Hey Aubrey, We finally got some snow, Just a bit but the ijits in T-town
are already playing bumper cars.
> Todd, I hope we get some snow.  It sure has been dry around here!  But, so
> far the sky is clear here in Norman.  How does it look over your
> direction.
>
> Bruce, thanks for the link on cast iron welding.  Based on what they say,
> it looks like brazing may be my best bet.  I have done very little
> brazing, so I could use some input.  Here's what I'm thinking of doing:
>
> 1.  Clean the area around the break as well as I can of 90 years of
> grease;
> 2.  File a V groove on both sides, leaving a little of the original in the
> middle to index the pieces;
> 3.  Clamp or wire the two pieces in position to a convenient length of bar
> stock;
> 4.  Heat the whole set-up to 900* or so in the forge;  (Why do they say
> not to use propane?)
> 5.  Braze the joint using the O/A torch; probably in several passes,
> alternating sides.
>
> Here are a few questions I have (so far):
> 1.  What kind of brazing rod should I use?  The flux coated kind you get
> at the hardware store?  Bare rod dipped in flux?
> 2.  If I use bare rod, what kind of flux should I dip it in?
> 3.  Do I put flux on the ends of the broken piece, or just on the rod?
> 4.  How do I tell when I get the preheat to 900*?
>
> I'm sure I'll have more questions later.
>
> Aubrey
> 18 degrees but no snow in Norman
>
>
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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."