Heat treating a large circular saw blade.
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Previously:
https://www.homemadetools.net/forum/...716#post225905
https://www.homemadetools.net/forum/...715#post178638
https://www.homemadetools.net/forum/...486#post222671
https://www.homemadetools.net/forum/...226#post191988
https://www.homemadetools.net/forum/...280#post227709
