Test blate 0.098″ thick, 7″ edge 11.75″ OAL
Previous ht aust at 2025F – edge was too brittle at 63rc. This blade is being weave with aust 1920F. 0.11% Nitrogen could amplified driving force from Aust to Mart phase conversion.
Aust 1920F yielded 64rc. Edge stability is good. Test edge geometry 0.013″ BET/ 14dps – passed common whittle material but bone. Chopped 2×4 & oak board fine.
64 Rc with 14C28N at 1929ºF is pretty good, I normally only got about 63 Rc as Quenched using aluminum plates. I’m thinking you said it passed common whittle material, but chipped on bone? With a 14 dpx and .013″ BET that’s not bad at all.
Common materials = Bamboo, African Blackwood, 16D nail, dried cow rib bone.
Tested at 64rc ‘untempered’. While my reference 14C28N blade with conventional ht tempered down 62rc failed to whittle my usually material.