I might respectfully add -
When you are finished forging it, heat that forging up red-hot and let it cool. In air is OK, so is buried in ashes or lime. Just do that one heat & cool cycle before you harden it. The purpose is to refine some of those huge grains developed during forging, and at least put the whole thing in the same metallurgical condition. You will find it lasts much better.
If some heat treated forging breaks and you see little crystals, well, those are the "huge grains" of which I spoke.
The heat of forging also burns out some of the carbon from the surface. I know it sounds paradoxical, but this soft "decarburized" layer on the surface sometimes causes quench cracks. Might be a good idea to grind of a few thousandths in the region you expect to quench.
Thats all, folks
Your P.I.T.A. metallurgist