Titanium weld repair - can it be done twice?

[velofrog]

Re:

Looks mint, and for £30 I’d say happy days!

 

[d8mok]

Re:

Agree for £30 it’s a bargain. Just keep a eye on it in case

 

[rwm1962]

Cheers all. Aye - some of the repair prices from frame builders are well beyond me at present & this is just local & a canny bunch. I was surprised it was so cheap. I was expecting a bit more as the last repair, a split at top of seat tube was also £30 & I guess was a bit simpler. They're a big outfit I just tried because they were nearby but thought it would be a fortune. Maybe they enjoy the distraction from the big projects! http://www.impressivewelding.co.uk

The blue bits are just oxide layers that were beyond the argon shield protection area. Around 300<340°c temp range. Not an issue.

That will do for me! Thanks!

 

[2manyoranges]

interesting re weld colour - £30:00 very good - and good to have the different takes on it....more learning....

 

[rwm1962]

& with the lightest of rubs with 0000 steel wool the blue is gone.

 

[rwm1962]

Now rebuilt with a few changes:
https://www.retrobike.co.uk/threads/orange-vit-t2.407256/page-3#post-3145195

 

[2manyoranges]

Ah the CokeShim - I had a lovely and expensive Team Marin Tange Ultimate. Needed a CokeShim. Bit like a Hugo Boss suit and cheap underpants.

 

[rwm1962]

If my build upsets Nazi sensibilities I'll take that as a win!

 

[hookooekoo]

As titanium is highly reactive when hot and in the presence of oxygen, a good weld in titanium requires what is known as a 'back purge'. A 'back purge' is simply a system that is setup so that some inert shielding gas flows to the back of the weld being made.