Kershaw composite question

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Dec 9, 2003
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Looking at the JYD II I am wondering how exactly the two steels are put together
The blade is made of two steels but they dont call it laminated or anything, they call it composite.... Since the blade appears to be colored to get the two tone effect I cant really see whether its laminated or not. To me it seems that rather than have multiple layers they may have fit the two steels together like a jigsaw pieces with the copper somehow filling inbetween like a mortar or something. It doesnt look like the copper accent is a liner going form top to bottom as you would expect in a laminated or damascus blade. The copper may also have been painted on or something like that. It calls it an accent so its unknown if that serves as anything but asthetic. If you follow the copper line it is like one line. It goes over the tip and under by the back of the blade which makes me think the two steels are put togetehr like a jigsaw. Plus if you look at the pattern it doesnt seem that the dark could be one steel and the light be a different. I dont think a laminated steel could provide that pattern, unless the coloring of the blade was not an indication of where the steels started and ended. It seems as if the two steels were cut with opposite patterns and then they just slid them inside each other. Does this make sense given the picture?
Maybe this is a known technique but ive never heard of it, maybe its the new wave of knife blades. But if im right about the jigsaw puzzle piece thing then im wondering if it would perform well under harder conditions.

Good pictures can bee seen in this review.
http://www.bladeforums.com/forums/showthread.php?t=582564&highlight=jyd
 
I think they use a powdered metal which is heated and compressed so the metal is a single piece and not joined in any way.
 
I think they use a powdered metal which is heated and compressed so the metal is a single piece and not joined in any way.

Sorry, but nope. They are definitely two separate metals joined together. See Kneedeep's link above.
 
kd and jm are spot on. IIRC, the difference in the color of the two different steels are the result of etching the blade. If you look at the new CB Shallot, they aren't etched, and the perception of color is almost negligible.

Kershaw hit it outta the park with the CB technology!
 
So is the copper serve as some sort of a mortar or flexing agent between the two different metals?

Does anyone know how this type of blade will perform under stress? Two different steels flexing at a different rate doesnt sound too good.
 
IIRC, Kershaw did all these tests when they were developing the Tyrade, and they found the bonding between the two metals was about the last thing on the entire knife that would fail. The blade would flat out break before the two metals would come unbonded.
 
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