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Re: Re: Re: DIY case hardening
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Posted by D.L. on January 11, 2004 at 17:39:44 from (216.67.186.250):
In Reply to: Re: Re: DIY case hardening posted by Craig on January 11, 2004 at 16:41:30:
When we did this experiment, we literally had a coffee can full of crushed charcoal... had heated the bar stock a total of about 6"... just jammed the whole thing into the charcoal. No flames, no indication of combustion, just sort of sat there! We did this in the college welding shop. Just in case, you might want to try this outside, away from trees, etc... but we had no problems. Once you harden steel to this degree, it will be very brittle... you'll need to temper it (actually a softening process) if you want to make tools (chisels, etc) because, as I mentioned earlier, the "case" went through the steel more than 3/16". If you want steel that's not quite so hard (and not so brittle), quench in oil. should harden to about Rc 30.
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