CASTING PRACTICE FOR HIGH-CARBON NITROGEN-ALLOYED CHROMIUM-MANGANESE AUSTENITIC STAINLESS STEELS

摘要

Progress concerning carbon additions in nitrogen-alloyed stainless steels presents new possibilities for the future of chromium-manganese based stainless steels. Work has been done to economically produce austenitic stainless steel alloys with improved mechanical properties and corrosion resistance. The metallurgical requirements to achieve enhanced properties are considered. The combination of a series of casting practices is crucial to manufacturing high-carbon nitrogen-alloyed austenitic stainless steel castings with minimal inclusion content. The practices to economically produce these castings at atmospheric pressure are discussed. Alloys of moderate to high nitrogen and carbon concentrations have been produced and examined in comparison to commercially available stainless steels. A review of melting trials, microstructural features, and the results of mechanical testing and corrosion resistance assessments are presented.