To use the "quench it with water" method you need to get it like
"orange hot" (yeah, I know everyone -sez- "cherry red" ;) so it'll
need at least MAPP gas IMO but not my experience, since I haven't
actually tried it. :/
Propane works great out in the open is all I know, see? :/
The easy out is prob'ly plain high carbon steel about 1%C??
Barely glowing red in the dark is 750F so you need to get it about
twice that hot. ;)
And you need to get it below 850F in less than a second and not
let the temperature climb back up both...
Get that little sucker as hot as you can and then -squirt- water
down into the hole to cool it as fast as you can and have enough
water to keep the cooling-going for the surrounding metal too.
That way the hot surrounding metal won't temper the Easy-Out.
Leaving it "dead hard" will leave it more fragile than glass.
No kidding on that, BTDT. :)
See how boiling water can toughen it?
But that only works if you cool it then let the temperature come
-back up- to like 212 or worse 350F.
Was typed out for the OP but maybe more for Papa's minions? :)
First try it with a tungsten bit of some sort then try quenching
it then just try drawing all the temper out, in that order? LOL :)
Either way get back with the method that worked for you in your
situation. Please. :)
Alvin in AZ