Prediction of Nonmetallic Inclusion Composition and Amount During Low-Alloy Pipe Steel Production

Abstract

Thermodynamic modeling is provided for nonmetallic inclusion formation during extra-furnace treatment and solidification of low-alloy low-carbon steels intended for use in corrosion-active media. Relationships are established for the effect on inclusion composition of alloying element additives, a periclase lining, calcium-containing materials, and presence of sulfur within a melt. Conditions are determined for a reduction in the amount of corrosion-active nonmetallic inclusions.