Thread: Zedteq Knives

Hi,

these knives can be custom hardened if required. A comment concerning hardness, I have read that even files (which have to be hard-as) are stress relief tempered at 175C.

I have been doing a bit of breakage testing recently looking at tempering temperature versus breakage characteristics - rough results - 200C brittle fracture, no permanent set in the test piece, 220 C, brittle fracture with some permamanent set; 240C, brittle / ductile fracture with permanent set in the test piece. If they are tempered at say 200 - 210 C I find they can chip a bit on the edge and therfore might be more prone to occasional half moon big chips - when used e.g. to lever joints apart. But then we NEVER do that - right???

If anyone is interested I can look at generating more test data and posting a few breakage photos...

Excuse the username - one doesn't want to be predictable - Darren zedteq knives

Good to see you here Darren

Originally Posted by Wurzelmangler

Hi,

these knives can be custom hardened if required. A comment concerning hardness, I have read that even files (which have to be hard-as) are stress relief tempered at 175C.

I have been doing a bit of breakage testing recently looking at tempering temperature versus breakage characteristics - rough results - 200C brittle fracture, no permanent set in the test piece, 220 C, brittle fracture with some permamanent set; 240C, brittle / ductile fracture with permanent set in the test piece. If they are tempered at say 200 - 210 C I find they can chip a bit on the edge and therfore might be more prone to occasional half moon big chips - when used e.g. to lever joints apart. But then we NEVER do that - right???

If anyone is interested I can look at generating more test data and posting a few breakage photos...

Excuse the username - one doesn't want to be predictable - Darren zedteq knives

Yes please