[TheForge] Brooms and Welding Cast

[Ralph Sproul]

	Peter, I appreciated one of your last comments on watching out for
longtitudnal tension with brazing.  I'd had a part do that and never
realized the braze would pull like that.
	You seem to have done a lot more brazing than I have.  Is the overheating
of the cast going to cause the brazing rod to "vaporize" when you touch the
rod to it? .........or is it something more technical like affecting the
graphite in the cast on the surface that might make it less likely to hold.
	Just curious if you've got some tips on the overheating end of cast to
braze where you probably know a lot more about it than I do.

Ralph

-----Original Message-----
From: theforge-bounces at mailman.qth.net
[mailto:theforge-bounces at mailman.qth.net]On Behalf Of Peter Fels And
Phoebe Palmer
Sent: Friday, December 16, 2005 8:42 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
>>
>
>
>
>
> _______________________________________________
> Manage membership or unsubscribe at:
> http://mailman.qth.net/mailman/listinfo/theforge
> theforge mail list group photo site is
> http://www.photoaccess.com
> Login:  blacksmithblacksmith at hotmail.com
> password:  anvil
> ___________
>
>
>
>
_______________________________________________
Manage membership or unsubscribe at:
http://mailman.qth.net/mailman/listinfo/theforge
theforge mail list group photo site is
http://www.photoaccess.com
Login:  blacksmithblacksmith at hotmail.com
password:  anvil
___________