20 small D2 EDC Knives, micarta, G10, colors

29 responses in the first minute. Not the most competitive day, but you definitely need to be quick regardless. Congrats to the lucky 20, as well as to CPK. You guys are definitely doing it right! :thumbup:
 
on_the_edge said:
29 responses in the first minute. Not the most competitive day, but you definitely need to be quick regardless. Congrats to the lucky 20, as well as to CPK. You guys are definitely doing it right! :thumbup:
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I bet the top 20 spots were done in less than 10 seconds. I was #27 and that couldnt have taken more than 15 seconds from opening of the thread. Can you see the exact post time to the second?
 
I had my claim copied/pasted and hit "Post" within 3 seconds of the unlock - and I had a stopwatch going to confirm it - and I'm still 5th in line.

That was fast!!!
 
Luca917 said:
I had my claim copied/pasted and hit "Post" within 3 seconds of the unlock - and I had a stopwatch going to confirm it - and I'm still 5th in line.

That was fast!!!
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I did the same but didn't time myself.
I pasted and hit submit and it took a good 5-8 secs for it to post and I'm 9th.
Done from my iPhone.
 
those look exactly the same as the 3V version, what gives?!







:D
 
Nice Nathan, have you made any videos of the cutting performance of this D2 ?
G2
 
Gary W. Graley said:
Nice Nathan, have you made any videos of the cutting performance of this D2 ?
G2
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I didn't take any videos, but we didn't skip homework:

1_5.jpg~original


Even though we already had a good process and optimized HT for D2, we consumed 5 blades tweaking it in for this particular heat lot, and another was consumed validating the work at the end of the heat treat. So the testing gods were given a 10% tithing on this batch.

We cut cardboard, carved pressure treated pine board, and chopped and whittled osage orange, carved slivers off nails and cut 4D nails in comparative testing between tweaks and known good work to validate the quality of the steel and dialed in heat treat. Nothing dramatic like cutting concrete, so no video, but I did dial it in and confirm they perform to my expectation.

I've found that things like abrasive wear resistance is largely a matter of chemistry we don't change, so the properties I can look for that equate to long term durability and edge retention are edge stability and failure mode (brittle or ductile or in between). So, standardizing on test geometry, cut media and cut technique we can dial it in pretty well. I was surprised but the sweet spot for edge retention ended up at a hardness between 62 and 63, which is a little harder than usual. We added a step we use in our Delta protocol we use for 3V and it appeared to reduce brittle fracture, allowing a little higher harness. Even at 63 it won't chip in a nail. In my opinion, this is my best D2 yet holding a good edge carving hardwood for a loooong time.


Edit to add: to be clear, when I say "dial it in" I don't mean dialing in the hardness. That just ends up where it does. We dial in the prequench temp, the aust time and temp, the tempering temp and the application of cryo. A lot of that work was done years ago and just needs validated and dialed in for a particular batch of D2. That's what is "dialed in".
 
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If it preforms anything like the skinner, this is going to be one heck of a EDC!
 
Now that's doing due diligence!
Thanks Nathan
G2
 
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