Cementite (Fe3C) is formed when the solubility limit of α ferrite phase C below 727 0C is exceeded. In terms of mechanical properties, cementite is very hard and brittle and plays an important role in strengthening the structure of steel. The cementite can remain compound at room temperature for half-stable indefinitely, but when it is subjected to aging heat treatment, it converts to α ferrite and graphite.
The structure formed by the combination of α ferrite and Fe3C layers (Lamels) is called perlite repeating one by one as a result of slow cooling of the steels. Due to its ferrite and cementite structure, perlite is more ductile, it has mechanical properties such as ferritic structure and harder and brittle cementite phase.
Figure 6 and 7 shows the EDS analysis that we have taken from the whole of the material and some parts of it. In the analysis we received from the overall structure, the distribution in the structure was better observed by making different coloring for each metal alloy. As a result of EDS analysis it is seen that the matrix consists of 96.93% Fe and other elements are in small amounts.
When we examine the spectrum peaks obtained from the EDS analysis, the two compounds come to the fore: in addition to compounds consisting of C, Mn and Si, compounds consisting of Fe and Mn are observed.