First of all, I have no idea what I'm doing, so I'm sorry if this is a dumb question. I heated a piece of mild steel bar stock 1" X 1/4" X 12", bent the end to a 90 degree angle, then tried to drill a hole in it (yep, should have done that first), and I can't seem to get it done. The drill bit doesn’t make much headway, then just becomes worthless. I'm thinking that I may have inadvertently heat treated the metal by not cooling it properly. My question is this: How can I un-treat the metal so that it won't be so darned hard to drill? Any help will be greatly appreciated. Thanks