Heat Treating CPM 10V

L

Lance Carrico

Joined
Jan 4, 2013
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I've played with CPM 10V only a little but really like it for smaller knives. I heat treated to Crucible specs at 2,150, plate cooled, then tempered at 1,020 for 2 hours X 3. My question is...seems lots of folks are liking to cryo CPM 3V (which has very similar mfg. heat treat recommendations), then temper it at 400. Is it the concensus to do the same with CPM 10V?

Has anyone done this? And, what were your results?

Thanks,
Lance
 
Hi Lance, A sub zero, best in Ln2 and for at least an hour is used to minimize the retained austenite. If you get a good quench on CPM10V RA is not such a problem with this grade and the multiple tempers at the high end (980+) will help to resolve it. Phil
 
Attached is a link to a study on cryo quench. It is pretty interesting. It says cryo does not transform any more retained austenite into martensite but precipitates n-carbide into the pre-existing martensite. I also says it increases wear resistance of metal to metal sliding wear especially at high speeds. So......great for designing bearings. For knife treat is it really necessary? Just asking?

http://www.industrialheating.com/ext/resources/IH/Home/Files/PDFs/Role of Eta-Carbide-Meng.pdf
 
Thanks guys. For 10V, I'm sticking with the "no cryo, high temp tempers". Good point, TTF. I will always cryo stainless.

I appreciate all the responses. Phil...I always appreciate the input of the Master...one who has been there, done that and learned the answers himself.
 
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