my mistake i accept your apology......i allow it to cool, not in a forced breeze to accelerate cooling, nor place in a liquid at any temp to reduce heat or aid in warping or hardening a weld, nor do i RETARD, its cooling in any way by deliberately smothering in any solution, gas or chemical substance either powdered or liquified.
"""So, I don't agree that you "never heat treat lawnmower blades""""......
the ones i purely press....i did not heat....noticably by eye, touch, etc.
"""ANY TIME you apply heat to steel"""
although i suppose i should heat treat them with a cigarette lighter first as that would be a heat treatment and less shock to the grain structure.
:D