sethorly wrote:Would you mind letting us know how you did that? What sort of vessel did you use to melt the metal in? What materials did you make the molds from? Or did you rather heat the metal up until it was maleable and then beat and hammer it into shape?
No melting - cast steel would be a terrible knife, and the melting point of steel is much higher than I'd be able to get it.
I'm very very far from an expert (or competent amateur) on blacksmithing, and I'm sure there are people on the forum who could give lots of very good tips, but here's what I did/learned:
1 - Heat the steel; I used a shallow pit full of burning charcoal which I blew air into through a pipe, using an old airbed pump I had.
2 - When steel is glowing, hammer it into shape - I found it's better to move the piece of metal and to keep the hammer in the same place rather than vice versa. Periodically re-heat the steel as it cools down and stops glowing.
3 - When you've shaped it, let it cool and then clean up your shoddy work with files/grinders.
4 - When that's done and you're happy with the shape, heat it up again until it won't stick to a magnet or you can see it's glowing a bright red, and then stick it into a pot of oil (or water in a pinch) to cool it very quickly - this'll harden it.
5 - The steel is now hard but brittle. Stick it in the oven on a high heat for an hour or two (google for more exact tempering advice!) to reduce the hardness slightly but add more flexibility.
That's more or less my understanding of it! But there's a lot of very good youtube videos by people with more knowledge that explain things very well. Or probably some smiths on the forum?