Quenching & Tempering

Very common sequence of heat treatment: quenching followed by tempering

The union of quenching and tempering (called “bonifica” in Italian) is divided into 3 main phases:

  • Heating metal to its austenitization temperature;
  • Rapid cooling of the material (quenching) in water, polymers & water, oil or salt;
  • Reheating of the metal (tempering) to modify its mechanical properties.
Common usages

The union of quenching & tempering is used to modify the mechanical features of metal, enhance its mechanical resistance as well as hardness.

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Pros
  • Increased mechanical resistance
  • Increased hardness
  • Increased toughness
  • Cons