tips for straightening a hardened blade?

D

dfarm

Joined
Feb 21, 2008
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I recently bought a kershaw factory second folder, and the blade is bent or warped. It is one of their composite blades if it matters. I was wondering if anybody had any ideas of how to try and straighten it. I have a vice and a 12 ton press. I am also going to trace the blade onto some 1095 so I can try to make a copy of it incase I break it.

Thanks!
 
I do a subcritical anneal, bend it straight, another subcritical anneal, and re-heat treat.
 
the blade is mostly 154cm (I belive) with a CPMD2 edge soldered / fused / welded / whatever to it, so, I don't know how it will handle getting HT'd again.
 
These are laminated blades done hot in a rolling mill .They are air hardening so you could reharden if necessaery.
 
In a way I guess, I normally think of Damascus or San Mai when I think of laminated steel.
 
dfarm said:
In a way I guess, I normally think of Damascus or San Mai when I think of laminated steel.
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I believe it's a similar method, just view it as a much wider piece of steel so that there is a clear distinction between the two steels.
 
Interesting. I guess the HT question depends on some very critical temperatures. At what temperature will the solder bond with the edge steel, spine steel and copper separator fail? What a bugger of a problem. Good luck.
 
Josh K said:
It's laminated. "Fused" is laminated.
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Laminated indicates that there are layers in the blade. The Kershaw blades are two pieces cut like jigsaw puzzle pieces that are then high temperature brazed together. I don't know what is used as a brazing material, but I'd assume that it should stand up to the HT. Be prepared for the possibility that the blade may come apart into two pieces when you try to redo the heat treat though....

-d
 
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