I think eventually if enough abrasive slips in here, we might just get to the pearls.

Just so there isn't any confusion, here is your original statement.

Quote Originally Posted by jimmyseymour View Post
I saw this done in my bladesmithing class for the ABS. Heating the spine while keeping the blade in the water to straighten out a warped blade. Michael Connor's from winters was teaching the class. I didn't get to see the whole process but no pressure was placed on the blade. It was gently heated and it straightened itself. The guy who did it said he could feel it straighten.

A blade could also warp because it was not stress relieved properly, or at all before harding. If using an oil quench if you move the blade around to much you could also cause a warp.
Heating a spine to correct a warp, implies post-heat treatment. And I clearly specified the conditions that required stress relieving a piece. Post heat treatment is neither a normalized or spherodized state. But you did mention stress relief. There is nothing in your original post about heavy machining cold material that would require stress relief. Nothing in the original post mentioned stress relieving the blade before it was heat treated. Straightening a warped blade in this way is not tempering the blade either. So this doesn't qualify as a stress relieving cycle as well. Sadly, it does not serve to "prove your point."

And how did those brainiacs come up with that number? How can you possibly time that? Are they taking photographs of the change and time it that way? I would hate to be the guy with the stop watch trying to get that one right.
You need to get out and read some better metallurgical and heat treatment books.

Actually it's called a vapor barrier because it causes a barrier. That is why boiler tubes will destroy themeselves from improper cooling if a barrier builds up between the tube wall and the cooling water. The barrier is self sustaining and the only thing the operators can do is correct there actions that caused it. To much heat, to much flow, not enough flow, wrong chemistry, etc...
A knife blade is considerably smaller than a big industrial tube and does not hold within it, a trapped atmosphere.

I think the next time you quench a blade, if you watch carefully, the bubbles grow then pop then regrow and many of them will release from the surface and rise to the top of the quench tank in the convection current caused by the warming of the surrounding water/oil/whatever being warmed by the hot blade, pulling more cooling oil into the proximity of the blade. The fact that the convection current develops shows that the blade is releasing heat into the quenchant, despite the fact that a vapor barrier exists or not. If your theory about vapor barriers being an interference in quenching things was a little more solid, then we'd not be able to harden any kind of steel.

So how does a wooden mallet make it wrong? Oh because you didn't say it.
I didn't say it was wrong. This has nothing to do with whether it's me saying it or not. You misunderstand two entirely separate techniques and call them the same. That's where you got it wrong. I don't mix apples and oranges and try to tell everyone they are grapes. I don't get pissed off about being wrong. I learn from my mistakes and move on.

I'm trying to help you win but you won't see that for a long time I suspect.