Oil n Foil ?

Hankins

Hankins

Joined
Dec 7, 2008
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Oil and Foil do the mix? Does anybody quench their O1 in SS Foil? Will it work?
Or just have to deal with the crud. Have used the powder with mixed results, mostly it just pitted anyway on carbon steel
 
For performance really similar to O1 W/O the decarb issue try A2, same steel with a little chrome, air harden, very nice
 
I've used it for thermal cycling, but unless you were willing to try the superhuman feat of jetting a hot blade out of the foil and getting it quenched before you miss the nose, it won't work. The blade will be too shielded from the oil by the foil/air jacket to cool properly.
 
There ya go! Would be like oil quenching and just holding it still in the oil
Vapor jacket city...
Thanks for the answer
 
maybe O1 in oil would probably still harden in the foil, but as Willie remarked the wrapping would introduce uneveness to the cooling leading to warping issues.
Generally speaking the foil is best suited for air hardening steels.
 
I don't/haven't tried it on 01, but we use turco rather than foil on our SS and love it.
 
I have perfected the art of not using foil and have only heat discoloration and ALL scale breaks clean and is left in the oil. ACTUALLY, that really happens but damned if I know why I'm so lucky. Just means I gotta strain the oil every now and then. Freak of nature I suppose.

I use a blend of oils that is a recipe I dreamed up. Mostly mineral oil, but has a few magic ingredients that will remain a secret until I lose my sanity... Oh in that case it has *honda* transmission fluid. Honda only. Similar to an old gun oil recipe I found. Very little flash and apparently loves my methods. Has yet to let me down with any steel. The thicker the stock the warmer it seems to enjoy hardening.
 
Chris Lambeth said:
I have perfected the art of not using foil and have only heat discoloration and ALL scale breaks clean and is left in the oil. ACTUALLY, that really happens but damned if I know why I'm so lucky. Just means I gotta strain the oil every now and then. Freak of nature I suppose.

I use a blend of oils that is a recipe I dreamed up. Mostly mineral oil, but has a few magic ingredients that will remain a secret until I lose my sanity... Oh in that case it has *honda* transmission fluid. Honda only. Similar to an old gun oil recipe I found. Very little flash and apparently loves my methods. Has yet to let me down with any steel. The thicker the stock the warmer it seems to enjoy hardening.
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Please do share such a mystical blend and technique with all of us mere mortals... This is a co-operative forum after all... ;)

Can you clarify that last line? Any association I can derive from that statement would put the relationship of mass to temp the other way around...

-Eric
 
The latter refers to the temperature of the oil when quenching. It's what I would call a medium speed oil that I use for most anything (I record my results too and this is how I came to these conclusions). I quench mostly at room temperature, however some steels, let's say 1095 at .300 thickness and it is a large blade, or it could be blanked but not ground, it will only produce around HRC 58 as quenched if the oil cool. If the oil is warmed especially higher than the 125 mark most use, I will have higher as quenched hardnesses from this example blade. Interestingly, most large blades do not need to be so hard and it does still produce a wonderful blade. Warming even as high as 200 ish would harden the example blade more yet, though it never will take it to what a water or brine quench will do. BUT 5160 for instance I quench in a similar thickness at room temp and it works miracles. Full hardness, scale free, and only discolored.

Am I being very clear? <--- not sarcasm
 
Funny. On Sunday a neighbor handed me a 1/4" thick knife and told me it's in D2, asking for heat+quench+temper. Wrapped in SS foil, into 1850F oven. Right around 30 minutes mark, he came over show me the steel paper wrapper with print "O1 precision ground". Slight amused, I took the knife out of the oven, cool the oven, knife back into oven at 1490F for 15 minutes soak. Dunk it in room temp canola while still in SS foil for 10 seconds, tin snipped a bunch of cuts to let the oil inside the jacket. Cryo dipped. temper twice at 550F. still tiny chippy due to large grain, up temper to 600F. Tested 56 HRC. Well, this knife since been batoned, chopped, digged, lateral whacked, stand on, oh hey - a happy neighbor. Well, he is now happily making more pry bar with edges out of Aldo 1/4" 80crv2.
 
Hankins said:
Heck yea forgot about that stuff Where is it sold?
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bluntcut said:
Funny. On Sunday a neighbor handed me a 1/4" thick knife and told me it's in D2, asking for heat+quench+temper. Wrapped in SS foil, into 1850F oven. Right around 30 minutes mark, he came over show me the steel paper wrapper with print "O1 precision ground". Slight amused, I took the knife out of the oven, cool the oven, knife back into oven at 1490F for 15 minutes soak. Dunk it in room temp canola while still in SS foil for 10 seconds, tin snipped a bunch of cuts to let the oil inside the jacket. Cryo dipped. temper twice at 550F. still tiny chippy due to large grain, up temper to 600F. Tested 56 HRC. Well, this knife since been batoned, chopped, digged, lateral whacked, stand on, oh hey - a happy neighbor. Well, he is now happily making more pry bar with edges out of Aldo 1/4" 80crv2.
Click to expand...


This is why I love 01.
 
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