Raitajäähdytys
Raitajäähdytys, also known as temper or tempering, is a process in metallurgy where a hardened steel is reheated to a specific temperature below its critical point and then cooled. This process is performed after quenching, which makes steel very hard but also brittle. Tempering reduces the brittleness by allowing some of the trapped stresses to relax and by forming more stable microstructures. The specific tempering temperature chosen directly influences the final properties of the steel, affecting its hardness, toughness, and ductility.
Lower tempering temperatures, typically between 150-300 degrees Celsius, result in a material that retains a significant
The cooling rate after tempering can also play a role, though it is generally less critical than