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17th December 07, 01:07 PM
#1
No oven gets hot enough for hardening. An oven can be used for tempering. See page 3 of this thread.
Kilted Teacher and Wilderness Ranger and proud member of Clan Donald, USA
Happy patron of Jack of the Wood Celtic Pub and Highland Brewery in beautiful, walkable, and very kilt-friendly Asheville, NC.
New home of Sierra Nevada AND New Belgium breweries!
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17th December 07, 01:38 PM
#2
 Originally Posted by Alan H
I remember reading, recently about heat treating a blade in the oven. I assume you set the oven on "broil" with the blade as close to the heating element as you can get it. After doing so, you then pull it out and quench in motor oil.
Any comments?
Hardening requires heating to non-magnetic "cherry red". There is a possibility of flash (fire) when using motor oil. I have always used automatic transmission fluid and quenched the blade facing North. Why? because my Dad did it that way. As for tempering, that has been covered well already.
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