#51
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Quote:
I cannot think of a time when using the same/nearly-same filler as material being welded would lead to a cracking/failure problem, so am thinking dilution is not the problem, in these cases ...? - no matter the welding method. For decades welders used parent metal strips to weld with (much before tig' arrival - Dec. 1942). Distinct fillers came about during the 1930's, along with the growth in numbers of alloys of aluminum, 4130, stainless, magnesium...etc. Incomplete fusion can be a problem, with any welding method, and tig is not above it all and seems also to have its share of cold-shut joints and insufficient filler deposition. (Note: NHRA requires drilled holes in welds to demonstrate depth of penetration on tig-welded roll bars/cages on those race cars.) Personally, I think careful scrutiny of failed welds is a priority in establishing any/all aspects contributing to failures, even adding third and fourth sets of eyes/minds .... (Caveat: Any number of competing opinions can and do arise as pertaining to welding questions/difficulties/methods/techniques/styles/preferences... etc etc, and so one clear choice/path/method/procedure may of its own volition, spontaneously diss i p a t e.)
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Kent http://www.tinmantech.com "All it takes is a little practical experience to blow the he!! out of a perfectly good theory." --- Lloyd Rosenquist, charter member AWS, 1919. |
#52
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If welds are failing in new material I'd say it's a heat issue. Sounds to me like, no matter which method is being used to glue the parts together, it all needs to be hotter. Take an extra minute to heat-soak a wider area before starting and see if that solves things.
Will
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Here to learn. William Pointer |
#53
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Been messing in the workshop today. When l learned to weld this was an essential qualification. Good fun too. We used to compete to see who could do the neatest one. Not as tidy as l used to be but not bad considering it's 30 years since l tried it.
1512651684534765162421.jpg Will
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Here to learn. William Pointer Last edited by Steve Hamilton; 12-08-2017 at 03:06 PM. |
#54
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TIG, I take it?
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Jerry Roy |
#55
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Safely tigging on the thick ends I see.
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Kent http://www.tinmantech.com "All it takes is a little practical experience to blow the he!! out of a perfectly good theory." --- Lloyd Rosenquist, charter member AWS, 1919. |
#56
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I always learn something when reading your posts Kent. Thank you.
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Chris (trying to be the best me I can be) |
#57
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Cut that pop can down the middle and but weld it back together. Then I will be more impressed. Not that I can do any better.
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Mark |
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