Identifying the Thermal Nature of Formation of Non-Metallic Inclusions in Hot-Rolled Billet From Fe-Ni-Cr Alloy

Identification of inclusions showed that a large proportion of inclusions are represented by refractory oxides MgO∙Al2O3 in a CaO∙6Al2O3 shell. steelmaking origin, on which the sulfide component is released, which leads to the formation of crystallization oxysulfide inclusions, which consist of CaO∙6Al2O3 oxides in a sulfide shell. The proportion of oxide and oxysulfide inclusions is 46 and 47 % respectively. The distribution of inclusions over the cross section of a hot-rolled billet is of a hereditary nature and retains the distribution of inclusions of the original ingot.