Integral Tutoarial part 3

i really like this tutorial, it is very well done and showing me a lot. great pictures. one question i have is about the quenches. i understand the quenting the butt end to get it hard, but why quench the blade before you clay coat it? does it hlpe the overall toughness or hardness of the edge with the 2 quenches? :) how long of blade can you do in that forge?
 
Thanks,

The heat treat is still really in the R&D process, but from some testing I`m finding it is leading to a tougher blade. What I`m trying to achieve is a blade strong enough to cut steel with minimum damage, be able to bend the 90, and yet still have a hard enough spine so if a hammer or rock is used to drive the blade through wire, or bone or what have you, the spine will not mushroom to badly. This is tough to do, I`m also trying to say hey...O-1 can and will surpass your original expectations of it, regardless of what you`ve hear about it. As I said the heat treat is in the R&D stages, and although I`m close to my goal, I may not be able to reach it. Every steel has it`s limit, stay tuned to find out if I do it or not.
So far the longest blade I`ve done in this forge is 11"
 
Great tutorial! I was real interested in your heat treating, looks like your pushing it as far as you can, should be one tough knife!
 
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