[TheForge] Silicon bronze

[Larry Brown]

You forgot to say Ta-Da!
L Brown

-----Original Message-----
From: TheForge [mailto:theforge-bounces at mailman.qth.net] On Behalf Of Dave
Mudge
Sent: Saturday, April 30, 2016 12:37 AM
To: Blacksmithing List Sponsored by ABANA
Subject: Re: [TheForge] Silicon bronze

Well thanks for your input Andrew. I finished the job quite some time ago.
I don't have access to a tig machine and it's been 38 years since I tig
welded anything although as I remember I was pretty good at it when I was
28.
As I recall, (which might not be real accurate) the tig welding we did in
the ship yard was mostly butt welding making up duct work for the hvac
system on a destroyer escort.
It was all pretty light gauge metal. This gear was approximately 6 inches
wide (thick) and about 36 inches in diameter. This was a huge chunk of
bronze with a deep gash in the top of one of the teeth. I was lucky enough
to have held on to several spools of silicon bronze mig wire from way back.
I took my spool gun and bronze wire and my own small tank of argon to the
job site at the customer's machine shop where they make gears. I cleaned the
damaged area real well with a soft pad on a 4-1/2" grinder and some solvent
that the customer had.
I rigged up the equipment on their welding machine (Millermatic 251) I made
a few passes on some scrap material that was the same as the gear was made
of to get my settings right.
I decided to just go for it. I made about 4 or 5 passes over the damaged
area. Cleaned well with a stainless wire brush. Ground the weld beads smooth
with the grinder.
Visually inspected
for porosity holes (there were none) Called the owner to inspect the job, he
liked it so I rolled up the equipment, policed the work area and was on my
way..........

On Fri, Apr 29, 2016 at 10:43 PM, Andrew Vida <osan at netlabs.net> wrote:

> I'm sure this is way late in the game, but this strikes me VERY MUCH 
> as a job for TIG.
>
>
> On 3/10/16, 12:32 PM, Dave Mudge wrote:
>
>> I have a client that makes large gears. He is making a brass  (or 
>> similar alloy ) gear that is roughly 6" wide and 36" diameter. 
>> Somehow they cut a gouge in the top of one tooth. Maybe 1/2" wide and 
>> 1/2" deep and a couple inches long. Asked me if I could silver solder 
>> the gouge. I said that one really can't "build up" silver solder but 
>> I happen to have a large spool of Silicon bronze mig wire. I am sure 
>> that I can fill the gouge with that.
>> Any
>> ideas on machine settings (Millermatic 251) or preheat or process? 
>> Anything will be helpful. thanks, dave 
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--
...sometimes you're the windshield,
...sometimes you're the bug
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