[Woodcarver] Knife making question

[Jan Oegema]

Joe D wrotes 

I think what you're doing is great. The high-speed steel in the drill bit should hold an edge providing the temper wasn't removed during processing. If it was removed by over heating and if the carbon wasn't burned off you can re-harden them and draw them back to 62 Rockwell (which is about where they began
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What repicy do YOU have to harden (or unharden) steel Joe ??

                                   Woodbutcher Jan
 

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