Thanks fellas.
I start with a piece of 01 tool steel gauge plate, mark out the profile of the knife i want out of it, and then with a bench grinder and files do all the shaping around the profile and put on a bevel with the files. The process is known as 'stock removal' knife making, as opposed to forging the shape out of one piece of steel and not grinding any off. Once all the metal work is done, (not forgetting to drill the holes for the pins! Did that once and then had to drill for ages in hardened steel!) the now finished blank is heat treated. Mine all average about 58.1 RC hardness.
I've made one knife with someone elses blade blank, a Scandinavian style stick tang. It was good fun, but it's not knife making exactly, just handling and sheathing. It is however a great way to get a blade shape that takes your fancy and making it your own with the handle materials of your choosing, and they're a damn site cheaper! Scandi blades all heat treated and most of the way sharp can be had for as little as £35-£40.
It really is remarkably easy to turn out a perfectly useable knife with just a few basic tools, doesn't have to be a masterpiece. There's a few guys out there that can do all your heat treating for you, which is a bit of an art in itself to get it just right without warping the steel in the quench! Good old Youtube has a wealth of good and bad videos that cover every aspect of it.