Is it possible? If so how, if not why? Is the special brazing rods available to do it?
Bruce Gordon has done similar things with bonding - that might be the way to go if you wanted to combine these two materials.
As Morroni proved years ago, it's quite possible to braze Ti. It is very expensive, and in the case of bicycle frames, not at all practical when you add the cost+skill required to do it.
Side note: Morroni was a genius of fabrication and design. I have one of his frame jigs and the more I use it, the more I find little details that show how well thought out it is.
Pino Moroni was a genius. The machine work of his that I saw was just amazing. He came to Trek when I was there and showed us his jig. I don't know if he wanted too much money or what, but they tried to copy it instead of buying one from him. It was a little fiddly, so they may have been worried about it holding up at production rates. He was a great guy to talk to, I saw him at Super Week after that, and he was giving a lecture right there on the starting line.
Last edited by unterhausen; 01-21-11 at 10:22 AM.
it seems to me that the trick is getting the silver to bond to the ti, once you get past that, you should be able to bond to dissimilar metals. I can guarantee I'm not thinking it through. I actually saw a Teledyne that had a silver brazed repair of a broken seat stay, so it clearly isn't impossible. The wisdom of the whole enterprise is a different matter.
whats an XCR frame? I was just wondering seeing as I dont know how nor have the equipment for TIG. Sound like i would need to be a master brazer to work with Ti so I guess thats out. I was just looking to build a light strong and rust resistant bike. IIRC the new stainless steels are pretty much designed for TIG or have sub 180lbs weight limits on them...
Live Wire. Jig Pics please.
Last edited by Scooper; 01-22-11 at 08:27 PM.
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I think that what they found necessary for the brazing of Ti was that it had to happen in a completely inert environment. Speculating here but perhaps the early successes had something to do with a very thourough and complete, joint localized purging process.
There are a bunch more here http://porterbikes.com/
take a execution idea off the AlAns in the 80's , screwed and glued .
they machined threads like Plumber's Pipe , tapered and naturally, R/H on one end and L/H
on the other . so turning the tube pulled it into the threaded lugs. and the epoxy held it together
had one of the head lugs crack on My AlAn, repair was quoted as pretty cheap,
in Italy ..
getting it to Italy from the Pacific coast was not.