Edge Rolling in High Vanadium Knives

[KnifeGrinders]

Mr. KG, thanks for sharing your results.

Vanadium carbides are generally slightly harder than Al2O3 abrasive, but significantly less hard than CBN or diamond.

Jan

You graph nicely shows why the common abrasives like aluminium oxide may weaken steel matrix around the vanadium and alike wear-resistant carbides..

When designing this test I was considering aluminium oxide or silicon carbide to oppose to CBN/diamond, and told myself that I cannot mix them if I want unequivocal results, i.e. I could not start on a Tormek silicon carbide SB wheel, and finish with the Tormerk honing paste made of aluminium oxide.
Knowing that aluminium oxide is a little softer on the hardness scale than silicon carbide, I thought that with aluminium oxide we will see a clearer difference with CBN/diamond, if any.