AustroTom
Hello All,
New to the forum and lovin' it.

I jump right to it, (didn't know where this would belong so I try here)[confused]

I have been doing artistic and architectural metal work now for over 30 years (I'm originally from Austria living in the US since 1991).

A client of ours just asked me to do a "Black Titanium" kitchen sink.

I was wondering if anybody could tell me how hard it is to weld titanium (I assume TIG is the way to go), and how to achieve the "Black" finish.

For the same client I'm currently doing a Blackened stainless steel Trough-like (disapearing edge), bathroom sink where I'm using Sculpt Nouveau Patina stain and clearcoat for finishing.

All input greatly appreciated
Thanks
Thomas
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jmccustomknives
Yikes!  He's not wanting much is he?  lol.  Titanium has to be tig welded and use argon as the shield gas.  Since it is reactive to oxygen at heat any that get to the weld zone will discolor and can cause problem welds.  I hope you quote him the "I don't want to do it price", it's going to be tough.  I don't know enough about getting those finishes to give an opinion. 

Rule #10;  "I can make that" translates to; "I'm to cheap to buy it new."

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AustroTom
Yeah, "Probably won't work price" for sure [biggrin] 

The sink is 30" x 20" x 6" high.
I'm thinking of bending the sides up (only 6" with 1" lip and 1/2" stand-off)
and weld the sides on the inside due to sanitation concerns.
The tough part will be sanding the inside corners, Hmm

Thomas
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jmccustomknives
Really, with Ti the toughest parts are going to be welding it.  As I said, Ti is very heat sensitive.  In some situations a welder has to use a "trailer" that's dragged behind the tig torch which shields the weld for an extended time.  Now in your case it might not be a bad thing, I seem to recall a blacksmith forging tongs at the last forge meeting.  I can't say for sure, but I do think they came out dark. 
As far as cleaning things up, they make buffing and polishing wheels that should work.

Rule #10;  "I can make that" translates to; "I'm to cheap to buy it new."

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Hank Rearden
OK guys, I'm curious how titanium is classified. Ferrous or Non-ferrous. I might need to add a category?
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AustroTom
I think I might have found a specialty welder who was in the aviation titanium welding business for years who could assist me in the welding portion of the project [biggrin].

Although I wanted to try it myself, the fact that one should do it almost in an "argon tent" is kinda unsettling.

But the next step is finish: how do you guys get your titanium knives so nice and black??

Thomas


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jmccustomknives
Hank Rearden wrote:
OK guys, I'm curious how titanium is classified. Ferrous or Non-ferrous. I might need to add a category?


Titanium is a non-ferrous metal.

Rule #10;  "I can make that" translates to; "I'm to cheap to buy it new."

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Skarzs the Cave Troll
Anything not made from an alloy of iron is non-ferrous. :L

AustroTom wrote:


But the next step is finish: how do you guys get your titanium knives so nice and black??

Thomas


I don't think most of us have much experience with Titanium, forging it or otherwise. I would guess the black would be a particular Titanium oxide, and perhaps it is achieved using a blackening solution. 
Have you looked elsewhere for more information on the matter? My guess is that Youtube has some videos on it. (Though that is not the same as hands-on.)
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