Deoxidation of steel intended for castings is particularly important. Because
rimmed steel, or even half-killed steel, cannot be used for castings, the oxygen content
must be as low as possible. Low oxygen content is also associated with non-metallic
inclusions nascent during solidification. Their morphology (number, location and size)
decides on the mechanical properties in service conditions (e.g. sub-zero temperatures
and in heat resistance conditions). Elimination of oxygen from steel must be combined
with the removal of inclusions and their impact on the quality of cast steel.
Keywords: Effect of deoxidation, Morphology of non-metallic inclusions,
Oxygen content, Type of deoxidation.
