supersaturation
Sulfurization - heat treatment, which is subjected to, among others steel to stabilize austenite. Obtaining stable austenite increases the corrosion resistance of steel. It involves heating the steel to the temperature at which the austenitic transformation occurs, and then, as in hardening, rapid cooling. The difference between quenching and supersaturation lies in the fact that supersaturation avoids the occurrence of martensitic transformation. Therefore, the supersaturation can be used only for steels where the beginning of the martensitic transformation is lower than the ambient temperature, i.e. for high carbon steels or containing alloy additives that lower this temperature and stabilize austenite such as chromium. Filtration is usually used for stainless and acid-resistant steels. wiki