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Old 03-02-2011, 07:59 AM
Ed Tipton Ed Tipton is offline
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Join Date: Apr 2009
Posts: 352
This discussion leads to another question: I do know that by applying clay to the spine you can limit the amount of heat that is applied directly to the spine and thereby achieve a level of differential hardening. Aside from using a torch with a directed flame, is there any other accepted metheod of applying enough heat directly to the edge while at the same time limiting the amount of heat getting to the spine...for example, could you clamp the spine between two "plates" of heavier steel in a vise leaving only the edge exposed and apply heat directly to the edge using a torch while allowing the plates to act as a heat sink on the spine? I can see where this metheod could work, but I am concerned that the edge might not be heated equally throughout it's length....but perhaps with enough "back and forth motion" with the torch it could be done. Comments please.
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