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I would say go to the thickness of a dime or a little more, it will also help with warping, and then get it to the quench as fast as possible. You’ve got to beat the nose, from 1500f to 1000f in...

So austenizing at 1500 should get you about 65rc as quenched, tempering at 400f should be in the 60-61rc area (I’m referencing Kevin Cashen’s website). Maybe your low rc is due to making the edge...

Maybe try putting it in the oven or a couple of fire bricks before it gets to room temp to give your kiln a chance to cool without the blade sitting at room temp too long. Also try tempering it at...

If i remember correctly you want to be around 3.8-1 from the edge to where the spine contacts the hone for a given spine thickness. 16*-18* included angle. This is a generalization btw. I made one...