[TheForge] Drilling hard metal

[Demon Buddha]

Grant Marcoux wrote:
> Andy:  The L-6 likely does not want to be drilled because of the Molybdenum
> found in that grade.  The Mo makes it slightly air hardening. It would be
> more so if the volume of Mo were higher. I use a fair amount of L-6 for
> blades myself and the slowest possible cooling rate is helpful.  Also, drill
> bits will not always bite into the layer of scale formed on the piece.  I
> slow cool, pickle to remove scale, punch mark my hole location, start with a
> pilot hole and then use my desired final size bit. 

	The scale on some of these steels is incredibly tough.  D-2 is just 
about the worst I've encountered.  It is miserable.