Thermodynamics of Nitrogen Solubility and Nitride Formation in Fe–Cr–Ti–Al–Si–N Alloy Melts

Min Paek, Hae-Sol Son, Jung-Mock Jang, Jong-Jin Pak

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Abstract

Thermodynamic behavior of nitrogen in Fe–Cr–Ti–Al–Si–N alloy melts was investigated by measuring the nitrogen solubility and solubility product of TiN and AlN by the metal/gas and metal/nitride/gas equilibration techniques at 1 823–1 873 K, respectively. The nitrogen solubility data measured in Fe–Cr–Ti, Fe–Cr–Si, Fe–Ti–Al and Fe–Cr–Al alloy melts was thermodynamically analyzed to determine the second-order cross-product parameters of Cr–Ti, Cr–Si, Al–Ti and Cr–Al on nitrogen in liquid iron using Wagner’s formalism. By considering the cross-product effect on nitrogen determined in the present study, the effects of the alloying elements on the solubility product of TiN and AlN in the multicomponent Fe–Cr–Ti, Fe–Ti–Al and Fe–Cr–Al alloy melts were successfully reproduced over the wide temperature range.
Original languageEnglish
Pages (from-to)640-648
JournalISIJ International
Volume60
Issue number4
Early online date15 Apr 2020
DOIs
Publication statusPublished - 2020
MoE publication typeA1 Journal article-refereed

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