Hello pausania, I follow
Crucible Steels HT for 3V per their
data sheet,
issue #5,
almost to the letter.
(Hi-temp foil wrapped blade into a cold kiln, ramp full to 1525*F, soak for 10 minutes. Ramp full to austinitizing temperature of 1950*F, soak 40 minutes. Aluminum plate quench with supplemental cooling done using vortec cold air gun. Tempering cycle, 1000*F for 2-1/2 hrs x 4 times
) End result is a final hardness @ 59-60 HRC. HT using Crucibles mid range recommended austinitizing temp for CPM3V (1950*F) results in a blade that has
impact toughness almost twice that of A2 (3V=70 ft.-lb
; A2= 40 ft.-lb)(using Charpy C-Notch impact test).
Wear resistance results for 3V are
2-3 times greater than A2 (using crossed cylinder adhesive wear test), (3V=7 ; A2=2-3)(approaching that of M2 @ 8-10) . I've chosen this HT process for 2 reasons, to take advantage of the excellent wear resistance that the vanadium content of 3V provides and also the increased impact toughness that is provided over A2 at the mid-range austinitizing temperature.
The extreme science that goes into high alloyed steels like CPM 3V and the precise,
repeatable results that can be attained in heat treat, still, never ceases to amaze me :thumbup: The more I work with and use CPM 3V, the more I like it ! It will take,
and maintain, an extremely thin and very aggressive cutting edge. Good stuff !!
And pausania, quit apologizing for your "bad english", I understand you perfectly
David, that hunter is beautiful, I love that wood.
Thank you very much Ralph

The wood ???
Here's the story, as told to a friend/customer, about the wood scales on the attached pic of a nessmuk I recently made using the same wood as is on the drop point hunter you like.
The wood is a piece of old twisted Birdseye Maple. I sent it out to wssi for stabilizing and also a staining process called chroma-brown.
Here's the pretty cool story behind the knife handle(s). When we bought our farm (about 15 yrs ago)(its been here for about 128 years now ) there was a really old anvil in one of the barns. It was sitting on an
old log about 2' long. The anvil sat in the barn, on that block of wood for years...... until I started making knives : ) I made a new stand for the anvil (one of which I forge knives on today) and tossed the old log in the corner. It sat there for several more years, until this last winter when I started using it as a splitting block for kindling in my shop. Finally, when I was getting low on firewood this past winter, I decided I was going to burn the block in my shop wood stove. Before splitting her up I knocked some of the bark off. Thank Goodness ! Underneath that bark was the most beautiful Birdseye log I've ever seen : ) Just
full of eyes, some spalting and burly twists too ! I promptly cut it into knife handle size blocks and have been sending out small batches to get dyed & stabilized. The chroma-brown process really brings out the beauty. I have some stabilized as "clear" too, which are also really nice, but not quite as nice as the chroma-brown ones, imho : ) I attached a couple of pics showing the log being cut up. What a joyous find it was : ) No telling how many decades the anvil had been sitting on that block. The bottom of the log was in pretty bad shape from sitting on the dirt floor of the barn for so long, but, for the most part the rest was perfect.
It sure is pretty isn't it ?