The betterment process is an intensive heat treatment type, also called “Quench and Temper” in English. It is a heat treatment process that can be applied to medium and high carbon alloy steels with good hardenability.
Martensitic structure is formed by cooling the workpiece taken to the austenite field in an oil or polymer bath. Temper martensite is made by tempering in order to remove the tension of the fragile martensite. The tempering temperature is determined according to the mechanical properties required by the application. Generally, the breeding hardness is in the range of 28-32 HRC.