It's all about wasting time on sharpening. I don't have a lot of time and can't afford to spend 30-45 mins every couple weeks sharpening something like 14c28n. When I do have 30-45 mins to spare, I need my knives to stay sharp for a good long while. Steels with high edge retention are time...
If I have a Para 3 in the m390 steel family and want to up the HRC from 59 to 63-64, is it possible to send out the blade for this service, or does this only work on blade blanks? Also, does a custom heat treat necessitate a regrind? Thanks.
SubMicron did two cut tests with SPY27 and found it to be superior to M390 and S30V on cardboard. The hypothesis is the edge stability is super high with SPY27 plus cardboard isn't super abrasive so SPY27 just keeps on going where other super steels with less stability falter.
After reading Larrin's excellent article: https://knifesteelnerds.com/2019/02/18/niobium-alloyed-knife-steels/ it's easy to imagine stainless steels of the future holding an edge as well as 15V. The key to this is eliminating vanadium and replacing it with niobium. Adding chromium to a vanadium...
I like it. PB washers are good too. I like bearings for gentlemen knives that are carried with khakis or slacks that stay relatively clean. PB is good for knives that get exposed to mud, dirt and grime.
I read in your article about the history of M390 where you wondered why Bohler used more expensive tungsten instead of upping molybdenum to the same effect. Why do they keep using tungsten vs. upping the molybdenum even in K390?