Solubility limit of nitrogen in Fe–Cr–C–N alloy melt under reduced N2 partial pressure

Min-Kyu Paek; Daniel Lindberg; Jong-Jin Pak

doi:10.1016/j.vacuum.2020.109726

Solubility limit of nitrogen in Fe–Cr–C–N alloy melt under reduced N2 partial pressure

Min-Kyu Paek, Daniel Lindberg, Jong-Jin Pak

Hanyang University

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Abstract

The N solubility in Fe–Cr–C–N melt was measured by the addition of Cr and C in liquid iron using the metal/gas equilibration technique at 1600 °C under a reduced N ₂ partial pressure. Cr increased the N solubility by the attraction force between Cr and N, while C showed the opposite effect on N in liquid iron. The present experimental results were thermodynamically analyzed by Wagner's interaction parameter formalism. The existence of the simultaneous effect of Cr and C on the N solubility was confirmed, which was determined as the second-order cross-product parameter of Cr and C on N in liquid iron. This parameter set in the multicomponent Fe–Cr–C–N system can be used to predict the solubility limit of N in the degassing process of stainless steelmaking.

Original language	English
Article number	109726
Number of pages	5
Journal	Vacuum
Volume	182
Early online date	26 Aug 2020
DOIs	https://doi.org/10.1016/j.vacuum.2020.109726
Publication status	Published - Dec 2020
MoE publication type	A1 Journal article-refereed

Keywords

Ferritic stainless steel
N solubility
Fe-Cr´-C-N system
Wagner's interaction parameter formalism

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10.1016/j.vacuum.2020.109726

CHEM_Paek_et_al_Solubility_limit_of_nitrogen_VacuumAccepted author manuscript, 1.49 MBLicence: CC BY-NC-ND

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title = "Solubility limit of nitrogen in Fe–Cr–C–N alloy melt under reduced N2 partial pressure",

abstract = "The N solubility in Fe–Cr–C–N melt was measured by the addition of Cr and C in liquid iron using the metal/gas equilibration technique at 1600 °C under a reduced N 2 partial pressure. Cr increased the N solubility by the attraction force between Cr and N, while C showed the opposite effect on N in liquid iron. The present experimental results were thermodynamically analyzed by Wagner's interaction parameter formalism. The existence of the simultaneous effect of Cr and C on the N solubility was confirmed, which was determined as the second-order cross-product parameter of Cr and C on N in liquid iron. This parameter set in the multicomponent Fe–Cr–C–N system can be used to predict the solubility limit of N in the degassing process of stainless steelmaking. ",

keywords = "Ferritic stainless steel, N solubility, Fe-Cr´-C-N system, Wagner's interaction parameter formalism",

author = "Min-Kyu Paek and Daniel Lindberg and Jong-Jin Pak",

year = "2020",

month = dec,

doi = "10.1016/j.vacuum.2020.109726",

language = "English",

volume = "182",

journal = "Vacuum",

issn = "0042-207X",

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TY - JOUR

T1 - Solubility limit of nitrogen in Fe–Cr–C–N alloy melt under reduced N2 partial pressure

AU - Paek, Min-Kyu

AU - Lindberg, Daniel

AU - Pak, Jong-Jin

PY - 2020/12

Y1 - 2020/12

N2 - The N solubility in Fe–Cr–C–N melt was measured by the addition of Cr and C in liquid iron using the metal/gas equilibration technique at 1600 °C under a reduced N 2 partial pressure. Cr increased the N solubility by the attraction force between Cr and N, while C showed the opposite effect on N in liquid iron. The present experimental results were thermodynamically analyzed by Wagner's interaction parameter formalism. The existence of the simultaneous effect of Cr and C on the N solubility was confirmed, which was determined as the second-order cross-product parameter of Cr and C on N in liquid iron. This parameter set in the multicomponent Fe–Cr–C–N system can be used to predict the solubility limit of N in the degassing process of stainless steelmaking.

AB - The N solubility in Fe–Cr–C–N melt was measured by the addition of Cr and C in liquid iron using the metal/gas equilibration technique at 1600 °C under a reduced N 2 partial pressure. Cr increased the N solubility by the attraction force between Cr and N, while C showed the opposite effect on N in liquid iron. The present experimental results were thermodynamically analyzed by Wagner's interaction parameter formalism. The existence of the simultaneous effect of Cr and C on the N solubility was confirmed, which was determined as the second-order cross-product parameter of Cr and C on N in liquid iron. This parameter set in the multicomponent Fe–Cr–C–N system can be used to predict the solubility limit of N in the degassing process of stainless steelmaking.

KW - Ferritic stainless steel

KW - N solubility

KW - Fe-Cr´-C-N system

KW - Wagner's interaction parameter formalism

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DO - 10.1016/j.vacuum.2020.109726

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SN - 0042-207X

VL - 182

JO - Vacuum

JF - Vacuum

M1 - 109726

ER -

Solubility limit of nitrogen in Fe–Cr–C–N alloy melt under reduced N2 partial pressure

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