| Summary: | The way a piece or tool behaves in operation is determined by the quality of the material
from which it is made, the precision of execution and heat treatment applied. In the
present research, it is highlighted the differences that take shape after heat treating
different materials (low carbon steel and high alloyed steel) including heating to
dissimilar austenitic phases (880°C and 1020°C), holding for non-identical times,
tempering at low temperature (260 °C) and then cooling by using separate cooling
mediums (oil, air and water). The results show no noticeable increase in the hardness and
mechanical properties for the low carbon steel after the heat treatment, but on the other
hand, the high alloyed steel, reveals distinguishable changes in both hardness and
mechanical properties. There is a close link between the structure, the parameters of the
thermal processes and the properties that are desired so that future specialists have to
assimilate the basic knowledge related to the phenomena that occur during a heat
treatment but at the same time it is important to equip the companies with machines and
measure devices, like a spectrometer
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