HSS needs fairly precise heat treatment. It's quite difficult to anneal HSS; it needs a closely-controlled heating and cooling cycle. I'm not sure you can do anything that would be satisfactory in a home shop, but give it a try! Look up the heat treatment specs and see how close you can come.
You could certainly make a tool and take it to a commercial heat-treat facility though, and have them harden it. A local shop here will take work "off the street" and as long as you're willing to wait until they have a batch of the same stuff going through the oven, the price is fairly reasonable. You might want to check around.
For home shop work, ordinary tool steel is much more practical. As long as you keep from overheating it in use, I think it's just as satisfactory as HSS.
[This message has been edited by SGW (edited 12-13-2002).]
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