I watched several videos about making hinges. Some examples:
Well, that didn't look too difficult (famous last words...). The most difficult part seemed to be the forge welding, especially because I allready have some failed forge welding experience behind me. But in the end, the welding proved to be the easy part! Just heat it up very very hot, and then very very quickly get it to the anvil and smash it. Oh, and using some real borax this time.
The really difficult part was shaping the hinge pin area. Small parts, loosing heat quickly and fidley manouvering with tongs. I had to dress up the result quite a bit with the file, but this is the result after a long afternoon of experimenting and actually making two halfs of two hinges. To be continued.