This time he is starting with a section of 3/4" steel cable. He wired tied them and then welded the ends to prevent fraying.
A lot of heat and some pounding and he had a flat piece of forged steel, this is similar to the hammer forging done to create "Damacus" steel.
After getting it to the right uniform thickness and width he cut out his blank
Cutting the bevel, adding some serrations to the spine and heat treating have been accomplished
Adding the handle and pin
Shaping and finishing the wood