First off I'm a total newbie on here, so I can't comment to much on the heat treating other then you should probably be grinding it after heat treating, not before. The edge was likely too thin to handle the heat without warping. I do know quite a bit about straight razors however, I regularly shave with one and have restored several before. First of all you generally need a pretty straight edge and spine. You have to be able to evenly hone the entire edge with the spine resting on the hone. The way it is right now, half the edge would be to shaving sharpness and the other half would be very dull. You have to have the right angle between the edge and the spine so that when you hone it you have a small included angle at the edge. It's nothing like a knife, I can get a knife to shave off arm hairs, even standing arm hairs, like nothing, but it still won't shave my face. You have to hone it with at least an 8000 grit stone and then strop it until the edge is perfectly polished.