First, heat treating a knife.
First time I’ve done this for about 6.5 years… Worked out pretty well, although I remembered why I stopped making blades this long; its a pain to get the whole thing the same temp all at the same time!
Was nice though, it only slightly warped, meaning the grinding I did on this blade was pretty even, and thats amaing since its the first blade I’ve ground for the same 6.5 years! 😉 Might have warped from my un-even heating though too. I’m betting it was both. But it pressed out OK before final cooling(yeah, I got cheeky and put a freshly hardenedm hard and brittle as glass blade in the vise and tweeked it before tempering it!)
Pre-heating the high end quench medium (veggie oil 😉 );
Oxy/acyt. torch ready to rock and roll;
And moments after quench;
The lighter grey area on the blade is where it hardened.
And, into the oven to temper for a couple hours at about 450F/500F
After “cooking” blades, and while waiting for the temper cycle, I went and cooked dinner;
One of my original recipes, a beef chorizo and mushroom chilli. 😀