OK guys, need info please.
Did the heat treat on my next two D2 blades today.
One turned out great, perfectly flat, nice and hard. Still have to temper it.
The second one is the problem. I don't know if I didn't press down hard enough during the plate quench or if there was an obstruction somewhere I didn't see, or what ever, but it has a very slight warp, just enough that I can see daylight between the middle of the blade and my table saw top. I have to look closely to see the warp when holding it up to a reference line, but it's there. Obviously this will cause significant issues with sharpening. People with better eyes might be able to see it more easily than I can.
So can I re-heat treat it to take out the warp being more careful during the plate quench, or do I have to start over??????
Yes. it was straight before the heat treat process.