The heat treatment is a crucial factor for the performance of the tool and consists of:
preheating – tempering – quenching

Preheating is gradual and tempering is assisted by highly accurate controls of temperature and austenitizing times
4-5 quenching cycles follow for the full transformation of the structure.
The austenitic grain is controlled after austenitization and hardness and structure control after every quenching.
At UFS, tempering is performed in a “vacuum” oven which guarantees high quality and repeatability.