Case hardening or surface hardening is the process of hardening the surface of a metal, often a low carbon steel, by infusing elements into the material's surface, forming a thin layer of a harder alloy. Case hardening is usually done after the part in question has been formed into its final shape, but can also be done to increase the hardening element content of bars to be used in a pattern welding or similar process
A generic term covering several processes applicable to steel that change the chemical composition of the surface layer by absorption of carbon, nitrogen, or a mixture of the two and, by diffusion, create a concentration gradient The processes commonly used are carburizing and quench hardening-, cyaniding-, nitriding; and carbonitriding The use of the applicable specific process name is preferred
A generic term covering several processes applicable to steel that change the chemical composition on the surface layer by absorption of carbon, nitrogen, or a mixture of the two and, by diffusion, create a concentration gradient The processes commonly used are carburizing and quench hardening; cyaniding; nitriding,; and carbonitriding He use of he applicable specific process name is preferred
A process of hardening a ferrous alloy so that the surface layer or case is made substantially harder than the interior or core Typically case hardening process are carburizing, carbonitriding, and nitriding
A process of surface hardening involving a change in the compsition of the outer layer of an iron base alloy by inward diffusion from a gas or liquid, followed by appropriate thermal treatment Typical hardening processes are carburizing, cyaniding, carbonitriding, and nitriding