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jonesjp@surry.net

jonesjp@surry.net

Joined
Dec 31, 2007
Messages
421
I got my leek CB today, and am fascinated by it; but frustrated as well.

I look up cpm-d2 in my search engines, and get a lot of references to Kershaw and Spyderco knives, nearly all on commercial sites, and cannot find real information on the steel itself.

I'm also fascinated by the geometry of the interface between the two steels. Why those curves in those places? and what is the thin red line?

Examining the edge of this knife and the other leeks I have I noticed that the edge is not honed, but has a definite roughness to it. I can imagine this as having some sort of dendritic effect, but I'm not sure. My other knives are honed on a high-grit stone system I use for my wood chisels. Both kinds of edges are sharp.....

I just don't get that many new knives, I guess.
 
I would check standard D-2 Air Hardening Tool Steel the biggest difference in the CPM is it's made from Powder, then Sintered & Hip
Processed. D-2 has been around for at least thirty years that I know of...

Darrell
 
The "red" line you see is actually copper, I believe Thomas said it helps to highlight the two different steels and the kershaw catalog refers to it as "copper accent". I'll let the true experts give you the full rundown on CPMD2 though. I don't want to mangle the definition and characteristics with my layman's terms;), but it's basically a harder steel that holds an excellent edge that uses the Sandvik 13C26 spine to give it added strength and flexiblity.

Cheers,
jon
 
Welcome to the Kershaw Forum!

Here's a link to one of the earlier informational threads about Kershaw's composite blade technology. Composite Blade Intro.

This link has pics of the CB Leek next to the Tyrade.

Don't forget the Composite JYD II should be due soon.
 
Knee deep, thanks for the link... very much appreciated. I especially liked seeing th transfomed buck knife. As a woodworker those dovetails lept out at me...

I like the technology a lot, it does offer us "alloy aficianados" an affordable way to hold something great.

I'd like to dig deeper into the science behind these new (to me) steels. My problem is that the search engine technology offers up so many commercial sites that I don't find the meat of knowledge I am looking for. How does the powdered d2 differ from what bob dozier uses, for example.

I realize I am probably going over old ground for lots of you, and appreciate your patience.
 
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