A heat treatment process which cases a steel component with a very hard skin, usually with carbon. Carburizing, nitriding, and flame hardening are good examples of case-hardening. Case-hardening is a good process for hardening bend dies, clamp dies, and pressure dies because it combines a hard wear surface with toughness — i.e., resistance to chipping and breakage. Compare through-hardening.
by builtbyRVWS | Jul 3, 2017