Knives in extreme temperatures

I think that those knives developed for use in "normal" artic temperatures like Fallkniven will do the job. Hey, why not invite some knife companies for a cold test. Have them send knives up to some strange cold place and see if they crack.
 
This is not correct. "Space" has a temperature of about 3° Kelvin (-270° Celsius),
Click to expand...

That is the background radiation temp or was it 4K. Does not matter much. The radiation balance temp of earth is around 17 C. In space the only way to lose heat is by radiation so this is what counts.

Austenitic steel is used at liquid nitrogen temps (-196C) and fares well. Would have to look it up but from memory: pearlitic steels don't like low temps, martensitic ones are better.

TLM
 
Cobalt said:
Now, almost any blade that has been deep cryoed can take sub zero temps with little change. Just not many makers do this as it's benefits versus time and cost are subject to interpretation. I do believe in cryo and I buy knives that have this in their HT. And no, deep cryo is not sticking a knife in a freezer at 100 below zero. Deep cryo is 300 below and or more and the blade has to soak there and there is a time temp process to follow to avoid creating internal stress risers. If the person/shop/place doing this doesn't know the specifics stay away. Les Robertson use to talk about how tough the Brend D2 blade was compared to other knives because of his HT process which involved cryo. Probably quite true.
Click to expand...

Just out of curiosity, where did you see that? I havent heard that cryogenics would change the ductile/brittle transition.
 
You must log in or register to reply here.
Back
Top