STUDY OF NONMETALLIC INCLUSION INHOMOGENEITY AND DISTRIBUTION IN A STEEL 38KHN3MFA INGOT CAST WITH A HEAD SECTION COOLER

摘要

Results are provided for a study of a steel 38KhN3MFA metal ingot weighing 1.53 tons cast with a head section cooler intended for producing hollow forgings. The position of pores and nonmetallic inclusion distribution is studied: oxides, oxysulfides, and sulfides. Features are revealed for the position and amount of pores and nonmetallic inclusions at three ingot levels: lower, central, and head sections. The effect of ingot head section cooling on crystallization and features of oxide, oxysulfide, and sulfide is revealed.