[TheForge] Welding cast iron

[David Childress]

This suject came up at one of our recent meetings.  More specifically
the subject was welding cast firepots.  Anyway several people had
heard preheat then mig with acast rod with copper wire wrapped around
it and then cool very slowly.  No one had tried this themselves.  This
sounds like a low lose chance to try the method.

David Childress
Rocky Forge Blacksmith Guild

On 5/19/08, IowaHarry <iowaharry at fastmail.net> wrote:
> Hi All,
>
>   I'm sure this has been asked before but here goes anyhow. I have broken
> the vise nut in my chinese vise shaped object(bench vise). I first did it
> about fifteen years ago, welded it, I don't remember what stick I used but I
> twisted a little too hard and broke it again. I spent some time looking for
> this on the net and most said to braze. So I brazed it. I threw another
> wrinkle in it as well. The crack was on the diagonal behind the nut proper
> so we cut the nut away from the base completely and made a black steel base
> to braze to. I would guess it to be A36.  I did this at work so I did not
> have access to the forge but we preheated, brazed, kept the heat up for a
> while, then dropped it in a bucket of sand for the rest of the day. Didn't
> hold for beans. It didn't stick to the steel not the cast side.  In the past
> I had spent some time making brazing repairs to large radiator coils so I
> thought I had an idea on how to do it. Maybe I don't. I have also had some
> difficulty finding steel acme threaded nut to replace it with.
>
>   So, there is my story of woe. Any advice?
>
> Harry
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