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Guys, I've run into a horrible problem. Currently I am working on the biggest commission of my life, and this blade keeps twisting along it's axis no matter how many times I re-heat and hammer it down flat. So, I've created this 40cm long blade, with 20cm long tang, consisting of 3 bars folded and twisted steel - as pr. my usual blades. Currently I am trying to normalize the blade before moving forward with grinding the ricasso and edge onto it - however - the blade keeps twisting along it's axis every time I re-heat and hang it by the tang from the ceiling to cool down. I heat it up to welding temperature, beat the damn thing nice and flat, stick it back into the fire to get it to above critical again - then I hang it up to cool down. By the time the blade has cooled down, it has twisted itself right back into it's original warped shape. At the moment I am at a complete loss as to what to do. Please have a look at the video below to see in what exact way the blade is twisted / warped: Any kind of input on this would be greatly appreciated! Sincerey, Alveprins.

I think everyone knows the phenomenon. I wrote a short rant about it: https://makesg.wordpress.com/2015/08/26/the-painful-truth-about-blade-warping/ Now I'm curious: is it a daily issue for everyone? How much warpage is too much?