[jimmontg]

Bright Orange is perfect for only 2 minutes. Next time try to work it back and forth and hold for 5 minutes at bright orange, but not yellowish. Temper at 400 degrees for 2 hours, then cool to room temp. Now take a metal shim, a penny or quarter and put it under the bend and clamp to an angle iron or some very thick metal and quench at 450 for 2 hours. Most of the warp should be gone. If there is still some you can clamp it on the ends and putting a shim in the middle slowly bend it straight. Now if you do not have something to clamp it too during temper you can bend it gently in a vise and I hate to tell you that if that is all you have, but if you are careful you can bend it in the vise, but do not try to go past the warp by more than 10% of the bend. Then maybe you can grind the little bit of warp out.

You didn't finish grinding it before heat treat did you?