QUENCH AND TEMPER

THE CLASSIC PROCESS OF QUENCH AND TEMPERING
AUSTENITIZING – QUENCHING – TEMPERING

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The quenching and tempering of metal parts with oil, the oil quenching and tempering, is assigned to the thermal heat treatment processes. It is a combined process of heating to the so-called austenitizing temperature with subsequent quenching in special hardening oil and reheating, the tempering.

1. austenitisation: Here the normally ferritic – pearlitic structure is transformed into the austenitic structure.

2. quenching: The material falls into an oil bath and cools rapidly, forming a martensitic structure. That is very hard and brittle.

3. tempering: The necessary toughness is achieved by reheating.

1. austenitisation
After detailed examination, cleaning and degreasing, the parts are heated in a controlled process. Heating to the perfect austenitizing temperature is our know-how built up in many years.

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2. Quenching
While still in the hardening oven, the parts fall into an oil bath where they cool down again quickly. Although the parts treated in this way are now glass-hard, they still lack the necessary toughness.

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3. Tempering
To increase the tensile strength and bending toughness, the metal parts are heated in a tempering furnace. The desired optimum hardness is achieved through precise temperature control.

ADVANTAGES OF QUENCHING AND TEMPERING

  • Increase of tensile strength and flexural strength
  • Setting of the optimum hardness according to customer requirements

Materials suitable for oil tempering
Classic heat-treatable steels from a Carbon content of approx. 0.22 % (depending on other alloying elements, especially Mn and Cr) up to classic bearing steels, e.g. 100Cr6 with a C content of 1%.

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