3V Heat Treatment

We all appreciate your knowledge Nate!!! I’ve learned a lot from reading your posts, and my results have been very good. Heat treat is my favorite part of knife making, like the samurai said, it’s what gives a blades it’s soul!
 
koduu said:
Could someone please tell me why is that so? I am hoping to make some skinning knife test blades out of vanadis steels (vanadis 4E and 10) that would hopefully have as shallow as possible edge angles and highly agressive and long lasting cutting agression. Using LN all the time would get cuite bothersome and pricey in the long run so what are the drawbacks of going for high tempering instead of cryo+low tempering?

Uddenholm states in its knife steel document that cryo + low termpering should be used for its stainless PM steels for corrosion resistance, but for vanadis series they say that high tempering is the way to go.

FOR VANAX and ELMAX - "Low-temperature tempering
is recommended to ensure good corrosion resistance, but
if necessary, clamp tempering can be used in the range
450–500°C (840–930°F)"

FOR VANADIS and SLEIPNER - "The Uddeholm Vanadis and Uddeholm Sleipner series
are heat treated according to normal procedures. As they
are non-stainless, high-temperature tempering is recom
mended. Therefore deep cooling is no longer necessary
to attain full hardness."

quoted from https://www.uddeholm.com/app/upload...holm_Premium_Steel_for_Knives_Eng_1703_e6.pdf
Click to expand...


If you look through the charpy thread, we did a bunch of testing with z-wear, a steel with a composition in the middle ground between 3v and V4E. There is a noteable increase in toughness with the low temper protocol compared to high temper. Martin explains it well, better than I could. Lower carbide video like and a uniform strong matrix help when going for fine edges. We might be giving up some wear resistance by decreasing carbide volume, but for knives, this is a good trade off.
 
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