So we continue to catch up with our Christmas projects, which can now be revealed. I made a knife for John. It is a big step. I am going from hacksaw blades (or even a cut-up circualr saw blade) to an old file as raw material. As I found out, there are some bumps in the road, although the principles are exactly the same.
I started out with a worn-out file. It was annealed overnight in the woodstove. In retrospect it was not enough! But OK, live and learn. I have, since I did this, gotten a book as a Christmas present. It is a book entitled Hardening, Tempering and Heat Tratment by one Tubal Cain, a pen name for the late T.D. Walshaw. You can google on it faster than than I can type in a long ISBN. Priceless. Anyway, I started with this semi-annealed file.
The rest of the knife is the business of honing. I've been before there on this blog! Try the "sharpening" label. And we must, of course, apply linseed oil to the handle.
Main lesson learned from this project. As if I didn't know it theoretically. The bigger the mass the more heat it needs to work it. Tempering this thing was a bear. From the book I cited above, I now see what I should have done. However, ignorance is bliss. I got away with it, and it is a very nice knife indeed.