The use of inoculating modification to increase durability of cast stainless steel blanks to intergranular corrosion

Abstract

The problem of improving the quality of centrifugal pipes made of stainless steel is considered. It is proposed to tap ferro-titanium in a furnace under slag, after its deep deoxidation by REM-containing additive for receiving such pipes with high mechanical and service properties. Before tapping the melt from the furnace, the melt must be processed by nano-dispersed titanium carbonitride in the modifying briquette composition. Implementing the above conditions allows increasing the tensile strength of cast metal by 10–15 %, plasticity by 30–45 % with increasing resistance to intergranular corrosion (IGC) in the casting section.