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  #1  
Old 05-16-2007, 07:04 AM
marky marky is offline
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I know this may sound strange ,but has anyone t.i.g welded silver,it is just to tack it to hold it in place until it can be soldered .e.g what polarity ,type of tungsten [and is it possible for me to keep all the scrap],if anyone knows you guys out there will ,i will let you know how it goes the trial piece is on Friday . aw ra best Marky :?
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Old 05-20-2007, 06:34 PM
bordontn2 bordontn2 is offline
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marky.......what are you making with silver?? Sounds like something large?
bordontn
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Old 05-24-2007, 06:50 AM
marky marky is offline
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The finished piece will be part of an arcitects model ,the silver will be the beams and other visible steel work ,the test pieces havent arrived yet so still dont know if its doable yet. aw ra best Marky
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Old 06-08-2007, 06:43 AM
marky marky is offline
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Well it works ,the silver was about 1 mm thick,20swg,it welds realy well for best results a thoriated tungsten on a d.c negative setting ,had to use realy low amps with a max setting of 65 and using the amptool pedal to control the variations needed . In fact it worked that well the pieces were fully welded rather than being tacked and then silver soldered,
Aw ra best

Marky
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Old 06-08-2007, 08:06 PM
LeadHead LeadHead is offline
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Cool! Did you use a filler rod? If so, what did you use?
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Old 06-11-2007, 06:42 AM
marky marky is offline
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Most of the weld was just fusing the edges ,but where a filler was needed a thin strip was trimmed from a sheet ,filler rods that cost £25 /$50 u.s a foot you dont leave these lying around .
aw ra best
Marky
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Old 06-13-2007, 11:42 PM
SteveB SteveB is offline
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Marky,
Go talk with a jeweler.
From what I've heard in the past, they don't tig, they braze all of the "precious metals."
However, if you have found that tig is doable for silver, you may need to be using a K/square-wave machine.
And the brazing, is much the same as they do for sil-floss brazing of high-pressure copper tubing found in AC systems.
Give us some photos of your progress.
Good luck.
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Old 06-14-2007, 05:32 AM
marky marky is offline
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I am working with a silversmith on the latest piece,due to its shape ,a bit like a triangular cone when the soldering heat was put in using a blowtorch the shape acted like a jet engine and the flames bounced back up the tube.also the silver does not anneal when welding.Its a square tig welder i have its a Lincoln squere wave 355,an exelent machine that does exacly what it says on the box.will post some photos as soon as i can.

aw ra best Marky
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