Ni-Hard hardening is a type of hardening in which the carbon is not separated as soft graphite, but rather as hard iron cementite. Ni-Hard hardening is resistant to load and pressure, but is also brittle. It also has a low tensile strength. By means of suitable cooling and alloying elements, the hardened surface or surface layer is hard and the core is Ni-Hard hardening with a fully hardened structure.
Ni-Hard hardening is used for parts that need to be hard and wear-resistant, such as crusher plates, balls for spherical mills, and abrasion parts of cleaning and casting machines.