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Science Forum Index » Engineering - Joining (Welding) Forum » Never an Ernie when I need one!
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| steamer |
 Posted: Fri Apr 18, 2008 11:45 am |
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Guest
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--Tried to duplicate your beautiful technique tig-brazing yesterday
but the results were so bad I'm reluctant to post a photo! Every time I got
the material hot enough to make the rod stick I wound up with cratering from
what I assume was the lower-temp alloying metal exploding. Much white debris
and no welding. Harrumph!
--
"Steamboat Ed" Haas : Life is a big
Hacking the Trailing Edge! : shit sandwich...
www.nmpproducts.com
---Decks a-wash in a sea of words--- |
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| Pete Snell |
| Posted: Fri Apr 18, 2008 12:23 pm |
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Guest
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steamer wrote:
Quote: --Tried to duplicate your beautiful technique tig-brazing yesterday
but the results were so bad I'm reluctant to post a photo! Every time I got
the material hot enough to make the rod stick I wound up with cratering from
what I assume was the lower-temp alloying metal exploding. Much white debris
and no welding. Harrumph!
Sounds like you were using the LF or 'regular' brazing rod. Get some
bare Silicon Bronze rod if that's the case. Regular old brazing rod
doesn't work well with TIG.
Pete
--
Pete Snell
Department of Physics
Royal Military College
Snell-p@rmc.ca
---------------------------------------------------------------------
It is a miracle that curiosity survives formal education.
Albert Einstein (1879-1955) |
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| BobH |
| Posted: Fri Apr 18, 2008 7:40 pm |
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Guest
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Pete Snell wrote:
Quote: steamer wrote:
--Tried to duplicate your beautiful technique tig-brazing yesterday
but the results were so bad I'm reluctant to post a photo! Every time
I got
the material hot enough to make the rod stick I wound up with
cratering from
what I assume was the lower-temp alloying metal exploding. Much white
debris
and no welding. Harrumph!
Sounds like you were using the LF or 'regular' brazing rod. Get some
bare Silicon Bronze rod if that's the case. Regular old brazing rod
doesn't work well with TIG.
I did some TIG brazing recently to have a filler material that would
hold up to powdercoating temperatures. It worked pretty well on some 16
gauge 1" square tubing I built tables out of. I filled in some
undercutting and a few other sins, ground everything flat and sanded it
before sending to the powdercoat shop. It came back looking great!
With the Silicon Bronze rod, you can still overheat it, but it takes a
good bit of heat. It's kind of cool the way the metal flows toward the
heat, just like my old O/A brazing days.
Bob |
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| stagesmith |
| Posted: Sat Apr 19, 2008 7:49 pm |
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Guest
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On Apr 18, 9:45 am, steamer <stea...@sonic.net> wrote:
Quote: --Tried to duplicate your beautiful technique tig-brazing yesterday
but the results were so bad I'm reluctant to post a photo! Every time I got
the material hot enough to make the rod stick I wound up with cratering from
what I assume was the lower-temp alloying metal exploding. Much white debris
and no welding. Harrumph!
--
"Steamboat Ed" Haas : Life is a big
Hacking the Trailing Edge! : shit sandwich...
www.nmpproducts.com
---Decks a-wash in a sea of words---
That was Low-Fuming Bronze not Silicon Bronze.
I thought we already had this talk.
Am I going to have to come down there and slap the crap out of the
counter guy at the welding supply store? |
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| johnnytorch |
| Posted: Sun Apr 20, 2008 6:54 am |
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"stagesmith" <ernie@stagesmith.com> wrote in message
news:9c05af03-41a8-4487-bfa4-4cec592700fc@p25g2000pri.googlegroups.com...
That was Low-Fuming Bronze not Silicon Bronze.
I thought we already had this talk.
Am I going to have to come down there and slap the crap out of the
counter guy at the welding supply store?
Sic 'em! |
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| steamer |
| Posted: Sun Apr 20, 2008 11:27 am |
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Guest
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--I think I got the rod right but the brass pieces I was heating to
lay it onto started doing the popping and erosion thing. Maybe too hot an
arc? Maybe too sharp and diffuse a tip? Unsure..
--
"Steamboat Ed" Haas : Life is a big
Hacking the Trailing Edge! : shit sandwich...
www.nmpproducts.com
---Decks a-wash in a sea of words--- |
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| BobH |
| Posted: Sun Apr 20, 2008 9:17 pm |
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Guest
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BobH wrote:
Quote: Pete Snell wrote:
steamer wrote:
--Tried to duplicate your beautiful technique tig-brazing yesterday
but the results were so bad I'm reluctant to post a photo! Every time
I got
the material hot enough to make the rod stick I wound up with
cratering from
what I assume was the lower-temp alloying metal exploding. Much white
debris
and no welding. Harrumph!
Sounds like you were using the LF or 'regular' brazing rod. Get some
bare Silicon Bronze rod if that's the case. Regular old brazing rod
doesn't work well with TIG.
I did some TIG brazing recently to have a filler material that would
hold up to powdercoating temperatures. It worked pretty well on some 16
gauge 1" square tubing I built tables out of. I filled in some
undercutting and a few other sins, ground everything flat and sanded it
before sending to the powdercoat shop. It came back looking great!
With the Silicon Bronze rod, you can still overheat it, but it takes a
good bit of heat. It's kind of cool the way the metal flows toward the
heat, just like my old O/A brazing days.
I just double checked, the filler I am using is marked Silicon Bronze
and it says on the label that it is suitable for for TIG, Plasma or O/A
brazing on steel. It is marked AWS 5.27.
Bob |
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