theWeatherman
Well-Known Member
So I know there is a couple different ways that would allow you to Heat Treat the blade to allow for the 90 Degree bend test for the JS test.
However, I know that you can use a torch and edge quench and that would work but what about other methods to differentially Heat Treat that would allow the blade to pass?
I am guessing that using clay wouldn't allow enough change in hardness from the edge to the spine. So what about drawing back the spine? You could use a torch on a fully hardened blade and draw back the spine by sticking the edge in water or sand and then heating the spine to a blue/grey which would temper it and making it springy.
What would you need to look for to be able to draw back the spine or differentially harden the blade so it will pass the 90 degree test?
-Brian-
However, I know that you can use a torch and edge quench and that would work but what about other methods to differentially Heat Treat that would allow the blade to pass?
I am guessing that using clay wouldn't allow enough change in hardness from the edge to the spine. So what about drawing back the spine? You could use a torch on a fully hardened blade and draw back the spine by sticking the edge in water or sand and then heating the spine to a blue/grey which would temper it and making it springy.
What would you need to look for to be able to draw back the spine or differentially harden the blade so it will pass the 90 degree test?
-Brian-