[TheForge] File Making

[James Binnion]

It can take hours for the carbon to migrate even a few thousandths of  
an inch. I think Dave is correct about the decarburization prevention  
and the reason for applying the powder at heat is so that it will melt/ 
stick to the surface.

> I may be exposing my ignorance here, but my understanding was that  
> the length of the heat in case hardening affected the depth of the  
> carbon enrichment.
> If the concern was hardening the sharpened edges on the file there  
> is not much to be had in terms of depth at that point.
>
> Might that be part of the answer?
>
> Mike Graf
>

James Binnion
jbin at well.com