All** of the internal pump components on the wave soldering machines at work are made of Titanium. The metal supports to hold the circuit boards just above/ just in the solder "wave" are also Ti. Solder doesn't stick to the Titanium at all.
Pat MacKenzie
** the only exception are the bearings (bushings actually), which are made of graphite.

Dave Simons · Oct 28, 2004 10:02 PM

#5 source

Ti to steel huh? - begs the question - why? sounds like the best excuse for nut & bolts I've heard for a while - or maybe rivets.

Only glue that I've got to work on Ti comes from a TIG welder...

Dave Simons · Oct 28, 2004 11:38 PM

#7 source

Actually, it might be possible, but with high temp solder. Somewhere, there is a repair scheme for AS350 helicopter Ti exhaust ducts that involves silver soldering or brazing some stainless steel gauze over the crack, so maybe it can be done. Your local Turbomeca overhaul shop might know - and they're on every street corner. Not.

Would need heating to red hot though & no doubt that the solder and flux would be pretty fancy. There is, somewhere, a Ti information website...

Gary Weaver · Oct 28, 2004 10:19 PM

#6 source

Get 2 pieces of scrap metal and try it. See what happens.

revaeW yraG

Circlepilot · Oct 29, 2004 12:05 AM

#8 source

Check this site out...attaching dissimilar metals by fusion, for the most is, impractical...today, most fusion of titanium is done in a controlled atmosphere...welding "under the bubble." The use of laser welders also.

http://www.deutschetitan.de/eng/profi/kb24.html

Steve Helmick · Oct 29, 2004 12:42 AM

#9 source

>Check this site out...attaching dissimilar metals by fusion,
>for the most is, impractical...today, most fusion of
>titanium is done in a controlled atmosphere...welding "under
>the bubble." The use of laser welders also.
>
>
>http://www.deutschetitan.de/eng/profi/kb24.html

Thanks for the link, Circleguy. That convinced me that it wasn't going to happen, even tho it is technically possible. I'm making some LG bits for club member Walt Russell, for his next Rabe "Rare Bear". The coil sprung LG will be done a little different, to save weight. I thought some Ti would save a little more, over steel. Maybe some lightening holes would be a better idea. Steve

http://www.nwskyraiders.com/index.html

scooterjay · Oct 29, 2004 08:16 AM

#11 source

yep, under the bubble means welding titanium in an atmosphere of argon, totally shielding the molten puddle of titanium from oxidizing into something that resembles dirty sugar!

SRiese5283 · Oct 29, 2004 02:22 AM

#10 source

Brazing Titanium
Several brazing techniques are applicable to titanium. These include induction brazing, resistance brazing and furnace brazing in an argon atmosphere or in vacuum. Torch brazing is not applicable to titanium. Since brazing techniques have the potential for contaminating titanium surfaces, cleanliness is important and consideration should be given to argon or helium gas shielding. Alloys for brazing titanium to itself or other metals are titanium-base (70Ti-15Cu-15Ni), silver-base (various), or aluminium-base (various). The titanium base alloy requires temperatures in the vicinity of 1700°F (927°C), whereas the silver and aluminium-base alloys require 1650°F (899°C) and 1100°-1250°F (593°-677°C) respectively. If corrosion resistance is important, tests should be run on brazed joints in the intended environment prior to use. The titanium-base alloy reportedly offers superior resistance to atmospheric corrosion and saline environments.

dirtydan · Oct 29, 2004 03:28 PM

#12 source

Scott,

You seem to have misplaced the attribution. Naughty, naughty, probably wouldn't care to have that done with your own work product.

And just guess how we know you didn't write this piece...

Dan

SRiese5283 · Oct 30, 2004 01:08 AM

#13 source

I could of...However, I found some sites that were up to date, my welding book is alittle out of date.(1980) I nevered Soldered Titanium. Welded a few things though.