Caseharden
ahd-5
transitive verb.
To harden the surface or case of (iron or steel) by high-temperature shallow infusion of carbon followed by quenching.
transitive verb.
To make callous or insensitive.
The Century Dictionary and Cyclopedia
To harden the outer part or surface of, as anything made of iron, by converting the iron into steel.
the GNU version of the Collaborative International Dictionary of English
transitive verb.
To subject to a process which converts the surface of iron into steel.
transitive verb.
To render insensible to good influences.
Wiktionary, Creative Commons Attribution/Share-Alike License
verb.
To
harden
the
surface
of
iron
or
steel
by
infusing
carbon
into the surface layer
verb.
To make
insensitive
to
hardship
Word Usage
"A Uberti in 44-40 Blue/caseharden Steel, NM, 5 l/2 bbl, Walnut grips."
verb-form
casehardened
casehardening
casehardens