COMPARISON OF ARC SLAG REMELTING VS. P-ESR MELTING FOR HIGH NITROGEN STEELS

摘要

High Nitrogen Steels with nitrogen contents above atmospheric solubility are usually melted using an advanced P-ESR process under elevated pressure. The nitrogen pick up can be controlled by Si_3N_4 or nitrogen gas. This paper provide a comparison of alloying by nitrogen gas by ASR vs P-ESR process in terms of processing and nitrogen distribution. In two series of ASR and PESR separate trials the nitrogen content was increased at remelting in nitrogen atmosphere practically twice in spite of big difference in nitrogen pressure. Comparison of P-ESR and ASR processes abilities in steel alloying by nitrogen from gas phase shown quite close results that gives us reasons for experiments continuation.