Case hardening is the process of hardening the surface of a metal by infusing elements into the material’s surface, forming a thin layer of harder alloy.
Combined with a subsequent hardening operation the desired component properties can be varied to suit the application.
A heat treatment used to achieve high hardness/strength on steel which consists of austenitising, quenching and tempering, in order to retain a tempered martensite or bainite structure.
Quenching technique that reduces the residual internal stresses and distortion resulting from non-uniform transformation and thermal shock typical of conventional oil quenching.
Heat treating process for medium to high carbon ferrous metals producing a metallurgical structure called bainite, used for strength, toughness, and reduced distortion.
Interrupted quenching of steels, at a temperature just above the martensitic phase. Delayed cooling equalises temperature and minimises distortion, cracking and residual stress.
The controlled hardening in restraining dies of close tolerance components, such as gears. Ensures good dimensional control and uniform hardening.
Case hardening process that increases wear resistance, surface hardness and fatigue life via a hardened surface layer while maintaining an unaffected core microstructure.
A treatment in which a part is subjected to two complete hardening operations, or first an annealing process followed by a hardening process.
Tempering is a low temperature heat treatment process normally performed after a hardening process in order to reach a desired hardness/toughness ratio.
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