For anyone interested in making their own micro-tools cheaply, including chisels and awls, I buy music wire from local hobby shops, where it is commonly sold for control rods and such for a few $ a stick in various diameters. They are high-carbon steel that is easily cut, worked and hardened with modest tools and a blow torch.
You can flatten a rod by heating and hammering it on an anvil or other hard steel object, or use a grinder or sander to rough shape before hardening. Otherwise you might overheat and ruin the temper.
To harden, heat the tip using a blow torch until bright orange for a couple minutes. Then quench in oil (I use olive or vegetable) -- this helps with rust.
I'm not sure if it's necessary to temper such small items that aren't subjected to high breaking stresses. Sometimes I heat them in a toaster oven for a few hours, also in oil to stabilize and distribute the heat..
Finally, use a wet stone or water wheel to sharpen.