Strona: Heat Treatment Laboratory / Katedra Odlewnictwa i Spawalnictwa

Heat Treatment Laboratory

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Carbolite HTF 1800 Furnace

  • The furnace is controlled by a digital PID controller with the possibility of programming several steps of heat treatment. Overheating protection (EN 605 19-2) adjustable in a wide range. The furnace reaches a maximum temperature of 1800°C. It has very fast heat-up time, durable aluminum oxide insulation and molybdenum disilicide heating elements. Due to these features, the furnace ensures the stability and accuracy of heat treatment.

Nabertherm N 61 / H Furnace

  • The N 61 / H furnace enables heat treatment up to 1280°C. The PID controller allows to program 9 segments with 20 steps of heat treatment and a time delay. There is a possibility of carburizing and nitriding. We have two furnaces of this type.

Digital thermometers

  • Model HD2108.2 by Delta OHM with two K-type thermocouples. It can be changed to different thermocouples and two tests at the same time. There is a possibility to connect and save the results on the computer.
  • Dostmann Electronic P700 series model with K type thermocouple. It can be changed to different thermocouples. There is a possibility to connect and save the results on the computer.

LS 4 Dyaltometr

  • The LS 4 dilatometric test station with computer recording of results enables the study of phase transformations of metals and alloys and the study of the thermal elongation coefficient.

Device for testing the hardening of steel, the so-called Jominy End Quench Test

The term hardening of steel is defined as the tendency to create a martensitic structure, where the hardened zone is defined as a zone containing at least 50% martensite. The hardness of a zone with a structure containing 50% martensite, i.e. the so-called semi-martensite zone, is called the critical hardness.

Hardenability is closely related to the rate of cooling of the steel from the austenitizing temperature. A martensitic structure is obtained at a cooling rate greater than or equal to the critical rate, i.e. the lowest rate that conditions the formation of a martensitic structure only.

From Jominy's end quench test one can read:

  • the maximum hardness of steel, the nature of changes in hardness,
  • so, after appropriate conversion, other mechanical properties,
  • critical diameter in a given cooling medium and, using appropriate monograms, the ideal critical diameter.

Induction hardening device

  • The Termetal device with a power of 15kW enables induction heating of bars and ends of bars, flat bars, pipes and others.

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