Knifemaker / Craftsman / Service Provider
- Apr 28, 2012
You are right on both points: slice pork rib bone is too far/difficult for 10dps ~2-3thousands of an inch edge. M4 & T-15 (steels with 4+W%) show best edge stability (also minimal wear) against rope & bamboo. 65.5rc Magnacut fine carbide microstructure still has good plasticity at this peak hardness. Magnacut fine grain doesn't excel over other steels because bcmw ht generated subgrain (grain within grain) putting all ht-ed steels on same playing field. Reflected so by compare e.g. between 66rc s90v and 65.5rc magnacut.This is awesome research, Luong. Thank you for sharing.
The bone was obviously a bridge too far for steels this hard and edges this thin.
To my eye, it looks as though M4 and T-15 fared the best on rope and bamboo. I thought MagnaCut would do better, based on your previous work, although it looks to be fairly good relative to most of the other steels in the bone test.
However if order ranking result on test/data objective without regard to hardness differences - plasticity range/distance then 26c3,niolox, cpm154, magnacut. Per my narrative in video - shouldn't compare between steels for slicing bone because of inconsistencies in cutting pressure; angle; etc.. Slice bone data did shown 26c3 & niolox & cpm154 & magnacut range of plasticity allowed prior to fractured.
I estimate at 0.01" BET edge, damage would be around 2x of bamboo at 0.0025-0.0035" BET. 12dps 0.01"BET = 1x bamboo. 15dps = 1x rope. Yep, dried bone is a nasty crunchy hard material.to be fair.
2 to 3 thousands of an inch behind the edge is essentially nothing. I'd like to see these results on the pork bone with say... .01" BTE