[TheForge] welding cast iron

[Washington, Aubrey O.]

Pete,
I had considered the possibility that a stronger forged replacement might result in something else breaking.  However, mine will be at least the third repair to the original part.  My break occurred at the margins of a previous weld repair.  (Maybe poor pre and post heat.)
 
I'll check with my welding supplier for the cast iron rod and flux.  I've heard mixed stories about the physical properties of a brazed joint.  Some say it can be stronger than the base metal; others don't say this.
 
Hmm.  I'm still wavering between brazing and cast iron welding.  The oxy-acet. torch is the only thing I've decided on.
 
Aubrey

________________________________

From: theforge-bounces at mailman.qth.net on behalf of Peter Fels And Phoebe Palmer
Sent: Tue 12/13/2005 1:25 AM
To: Sponsored by ABANA
Subject: Re: [TheForge] welding cast iron



That feed ratchet arm came broken on my post drill too.
Could it be that that is an easily reparable weak link in the
system and that replacing it with a stronger forged one will do
more damage when the next screw up happens?
A normal oxy-acet torch and cast iron flux with the cast rods
works fine with sufficient preheat on cast iron.
Brazing rod shrinks at a different rate than the cast and can add
stress to long joints.....Pete F

Patty Draper/Bill Robertson wrote:
> I'm logging on late on this topic.  Has anyone mentioned the Henrob 2000
> torch.  With cast iron welding rods that are available it welds cast
> iron great with just low pressure ocyactelyene.  Just Google Henrob
> torch and you will find tons of info.  Bill
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