Definition of case-harden in English:
case-harden
verb ˈkeɪsˌhɑːdnˈkeɪsˌhɑrdn
[with object]1Harden the surface of (a material)
the blades are case-hardened with reinforced backing plates
- 1.1 Give a hard surface to (iron or steel) by carburizing it.
the grade of steel was unsuitable for the type of heat treatment used to case-harden the gears
- 1.2 Make (someone) callous or tough.
years of surgical experience did not case-harden him to suffering
Definition of case-harden in US English:
case-harden
verbˈkeɪsˌhɑrdnˈkāsˌhärdn
[with object]1Harden the surface of (a material)
the blades are case-hardened with reinforced backing plates
- 1.1 Give a hard surface to (iron or steel) by carburizing it.
the grade of steel was unsuitable for the type of heat treatment process used to case-harden the gears
- 1.2 Make (someone) callous or tough.
years of surgical experience did not case-harden him to suffering