Let me share what I do when a blade warps. This is the best trick ever! It's not mine, but I don't remember where I got it. Marchand, maybe? Invariably when heat treating, you'll end up with some warped blades. These were plate quenched, so there's no logical reason for them to be warped, and yet four of the 13 in the batch are crooked. They were all straight going into the dry ice. Use a piece of 3/16 bar stock, angle iron, or a big file. Doesn't matter what it is, just needs to be stiff. Shim the blade so that you can clamp it and bend the warp a little past straight. You want to over-compensate just a little. Pennies make good shims. I always do any jig clamping in between the first and second temper cycles. After you have it clamped, run it through your second cycle. It comes out straight more often than not. You can temper as many cycles as you need to get it straight without any harm to the steel if you use the same temperature. The most I've ever had to do was four tempers, but that one came out straight eventually. I have not re-heat treated a warped blade in three years thanks to this trick!
