In this article, the effect of heat treatment on the microstructure and
mechanical behavior of medium-carbon steel wire intended for the spring mattress
is investigated using scanning electron microscopy (SEM), electron backscatter
diffraction (EBSD), X-ray diffraction, Vickers hardness (Hv), and tensile
strength. The results indicate that the microstructure elongation along the wire
axis is observed with the bending and kinking lamellae at the deformation level
of 57.81%, this change appears as a fracture in the microstructure and leads to
an increase in hardness, tensile strength, and intensities of diffraction
patterns. After heat treatment, we observed a redistribution in the grain, which
is almost the same in the wire rod and drawn wires; indeed, this led to a
decrease in hardness, tensile strength, and augmentation in intensities of
peaks. The EBSD pole figures reveal the development of texture in the cementite
slip plane (001).
