Research shows non-metallic inclusions vary during secondary treatment of bearing steel, suggesting methods to reduce contamination.
The nature of the formation and features of the evolution of nonmetallic inclusions during the steelmaking conversion of bearing steel (ШX15) has been studied. It was found that the maximum contamination corresponds to the beginning of secondary treatment and after solidification (in CCB). The main types of inclusions observed at all stages of the conversion are calcium aluminates (CaO•Al2O3) and magnesia spinel (MgO∙Al2O3). Metal rejection occurs due to large complex inclusions (2CaO∙Al2O3∙SiO and MgO∙Al2O3×CaO∙Al2O3). Critical parameters have been determined and technological recommendations have been developed to reduce contamination with large globular inclusions.
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Дроздов et al. (2025) studied this question.
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