Super Steels vs Regular Steels

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Joseph Gardner said:
2400 degrees even with a semi brine quench will not drop down to martensite, I did cross section cuts and stock removal just to check for case hardening, isnt either and all martensite will shatter without a temper, I beat the hell out of this thing trying to break it untempered and it doesnt break. 3 hours is enough to get over the curve at sustained temp. the material is also through hardened and there is only ONE pitch tone and no resonance. very very short high pitched sound with no lingering ring or vibration. Martensite will resonate and continue to do so. It has deviant physical properties abnormal to conventional heat treats for spring steels. I cant claim to know what exactly it is but I know what its not.

Im in the process of occasionally trying to replicate the process with a very thin casing of satanite filled with grainulated charcoal and a piece of steel sealed in the canister.
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I haz a question, not being a smartass either: how did the pile of charcoal with air blowing through it for three hours maintain a constant temperature and atmosphere without adding fuel or tending to it? I don't use charcoal, maybe it lasts longer than I think. :[
 
Mecha said:
I haz a question, not being a smartass either: how did the pile of charcoal with air blowing through it for three hours maintain a constant temperature and atmosphere without adding fuel or tending to it? I don't use charcoal, maybe it lasts longer than I think. :[
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Charcoal gets complex. Theres a process called a reducing flame which creates a reducing atmosphere. Basically when there isnt enough airflow that the charcoal eats inself due to lack of ogygen this spot isnt where the air is at but just above it. I use a narrow channel of brick stacked very high with lots of charcoal piled ontop of it. The knife ended up on the oppisite side of the brick away from the airflow in a choke zone.

Its a very useful process for forge welding because ogydation becomes less of an issue and carbon absoption and defusion assists in filling in the porus spots in welds
 
Joseph Gardner said:
Charcoal gets complex. Theres a process called a reducing flame which creates a reducing atmosphere. Basically when there isnt enough airflow that the charcoal eats inself due to lack of ogygen this spot isnt where the air is at but just above it. I use a narrow channel of brick stacked very high with lots of charcoal piled ontop of it. The knife ended up on the oppisite side of the brick away from the airflow in a choke zone.

Its a very useful process for forge welding because ogydation becomes less of an issue and carbon absoption and defusion assists in filling in the porus spots in welds
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Ahhhh, a tall narrow stack of slowly burning charcoal.
 
Joseph Gardner said:
2400 degrees even with a semi brine quench will not drop down to martensite, I did cross section cuts and stock removal just to check for case hardening, isnt either and all martensite will shatter without a temper, I beat the hell out of this thing trying to break it untempered and it doesnt break. 3 hours is enough to get over the curve at sustained temp. the material is also through hardened and there is only ONE pitch tone and no resonance. very very short high pitched sound with no lingering ring or vibration. Martensite will resonate and continue to do so. It has deviant physical properties abnormal to conventional heat treats for spring steels. I cant claim to know what exactly it is but I know what its not.

Im in the process of occasionally trying to replicate the process with a very thin casing of satanite filled with grainulated charcoal and a piece of steel sealed in the canister.
Click to expand...

How many seconds did it take to get to room temperature from 2400’f when you quenched it?

Hoss
 
My current favourite "super steel" is CPM 154. Really decent edge retention for my typical use, sharpens up with relative ease and takes a beautiful high polish.:thumbsup:
 
danbot said:
My current favourite "super steel" is CPM 154. Really decent edge retention for my typical use, sharpens up with relative ease and takes a beautiful high polish.:thumbsup:
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I still like a well done elmax, though 204P/m390 and M4 are close behind if we're talking about steels for pocket knives alone. I have a 10V knife from BC that is really superb, though, all things considered. Probably my favorite. But that's obviously not normal considering the opinions in this thread.
 
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