Boker Cera-Titan sharpening.

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Oct 1, 2008
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I recently picked up a Boker Cera-titan pocketknife. The long discontinued Boker Zeta. I wanted a gent folder... the titanium and carbide sintered blade... well. I decided I had to have it.

Doing some research led me to find out that on the masserforums (german language knife forums) the Boker rep talked about how the Japanese guy that made the material was this tinkerer metallurgist that came up with brilliant stuff.. and that he wouldn't tell them enough about it. So anyway they don't know how to sharpen it cause it gets hot, I guess... on the diamond grinders.

Cera Titan is a titanium carbide sintered blade. Best I can figure that means titanium and carbide powders (and a little silver but I don't know what for) are put together, and heated in a vacuum... and as they cool they form one material.

Thats the story. As I have no access to an electron microscope I'm guessing its a fancy way of saying its a titanium blade with tiny bits of carbide in it... probably zirconia cause they keep calling it ceramic... and ceramic knives are made of the same stuff.

Ok.. so. The question is how to sharpen it? If the diamond grinder doesn't work well (so said the boker rep... dunno if its cause of heat or cause of mechanical stress pulling carbide out of the matrix), and regular sharpening stones are going to uh, get roughed up by the carbides in it... then how shall I sharpen it?

I'm thinking balsa or basswood as a strop, with diamond powder paste on top... and time.. and elbow grease.

But it might need a rough edge if the blade cuts cause of micro serrations... so... who knows. Perhaps a polished edge will dull it.

Any help is appreciated!
 
I recently picked up a Boker Cera-titan pocketknife. The long discontinued Boker Zeta. I wanted a gent folder... the titanium and carbide sintered blade... well. I decided I had to have it.

Doing some research led me to find out that on the masserforums (german language knife forums) the Boker rep talked about how the Japanese guy that made the material was this tinkerer metallurgist that came up with brilliant stuff.. and that he wouldn't tell them enough about it. So anyway they don't know how to sharpen it cause it gets hot, I guess... on the diamond grinders.

Cera Titan is a titanium carbide sintered blade. Best I can figure that means titanium and carbide powders (and a little silver but I don't know what for) are put together, and heated in a vacuum... and as they cool they form one material.

Thats the story. As I have no access to an electron microscope I'm guessing its a fancy way of saying its a titanium blade with tiny bits of carbide in it... probably zirconia cause they keep calling it ceramic... and ceramic knives are made of the same stuff.

Ok.. so. The question is how to sharpen it? If the diamond grinder doesn't work well (so said the boker rep... dunno if its cause of heat or cause of mechanical stress pulling carbide out of the matrix), and regular sharpening stones are going to uh, get roughed up by the carbides in it... then how shall I sharpen it?

I'm thinking balsa or basswood as a strop, with diamond powder paste on top... and time.. and elbow grease.

But it might need a rough edge if the blade cuts cause of micro serrations... so... who knows. Perhaps a polished edge will dull it.

Any help is appreciated!
Is cera-titan a blade with a ceramic core and titanium sandwiching the core?

If it is, read this
http://www.bladeforums.com/forums/showthread.php?t=502919
 
Is cera-titan a blade with a ceramic core and titanium sandwiching the core?

If it is, read this
http://www.bladeforums.com/forums/showthread.php?t=502919

No, Ceratitan is a powdered mix of caramic, and sintered titanium, with the silver added, I also do not know what for.

As far as sharpening it, the best we have found is an extra fine diamond hone,
like the green handled ones from DMT.
It will not polish the edge, and keep it from cutting, and does a honing job just fine.
Other than that, I can't say anything else. This is just through experimenting in the shop.
Thanks, Terry
 
Thanks Terry! One more quick question. How sharp can you get it? I know thats totally a subjective thing. Sharper than the factory edge?

Knowing how sharp it can get will let me know when I'm finished.

Some comments have said they couldn't get it sharp compared to their other knives, some say it is easy to sharpen, and some say it doesn't hold a razor edge, but stays relatively sharp forever.

BTW, I think the silver is to add a antimicrobial component to the knife blade... for kitchen use. Silver ions interfere with microbial metabolic processes by binding to elements they need.
 
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