01-03-2018, 10:34 AM
I see once again I didn't actually answer Mr. Greppers question. I'll have to do better in the future. Yes, it is possible to heat the edge or tip hot enough to reharden it when grinding. I don't think it's very likely it could be done by accident, but I'm sure it's happened a time or 2 to somebody.
Many modern steels are air hardening, and if heated high enough, the blades will harden on cooling in air. Again, not likely, but possible.
Steel that's been hardened and not tempered behaves a lot like glass. Unless the edge is breaking visibly, I wouldn't worry about it.
Many modern steels are air hardening, and if heated high enough, the blades will harden on cooling in air. Again, not likely, but possible.
Steel that's been hardened and not tempered behaves a lot like glass. Unless the edge is breaking visibly, I wouldn't worry about it.