EDGE RETENTION/ROLLING PART II

[Mark Reich]

Thanks for keeping us up to speed on this project, Mike.

The only remarkable thing I see is something other than a clean scratch pattern all the way to the EOTE.

Almost looks like a slight micro bevel, but knowing that you didn't do that, I'm surprised the blade is that sharp.

The reason you were able to sharpen before heat treat is because you didn't grind bevels on your blades.  

Normally you'd grind your bevels in the neighborhood of 3-5 dps down to an edge width of about .015", which is the thickness you would need to keep the edges from warping in HT.

Without any bevels, your blades are very thick in comparison, and you have only a very tiny apex of steel less than .015." thick, with tons of steel behind it.

This is a scale drawing of 1" wide, 1/4" thick bar stock with 15 dps bevels in the shaded portion, which is the EOU blade.

The white part is a normal flat ground blade superimposed inside the EOU blade.

Hope this makes sense.