The Nitrogen Solubility in Molten Stainless Steel

Nitrogen solubility in the austenitic stainless steel melts was measured in the laboratory by bubbling nitrogen gas under different partial pressures of nitrogen and temperatures. A new thermodynamic model for the calculation of nitrogen solubility in molten stainless steel in a wide range of alloy...

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Published in:Steel research international 2005-10, Vol.76 (10), p.740-745
Main Authors: Jiang, Zhouhua, Li, Huabing, Chen, Zhaoping, Huang, Zongze, Zou, Deling, Liang, Lianke
Format: Article
Language:English
Subjects:
Alloy steels
Concentration (composition)
ferritic stainless steel
high nitrogen steel
Mathematical models
Nitrogen
nitrogen solubility
Partial pressure
Solubility
stainless steel
Stainless steels
Steels
thermodynamic model
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description Nitrogen solubility in the austenitic stainless steel melts was measured in the laboratory by bubbling nitrogen gas under different partial pressures of nitrogen and temperatures. A new thermodynamic model for the calculation of nitrogen solubility in molten stainless steel in a wide range of alloy concentrations, temperatures, and pressures has been successfully established by introducing a new term for the effect of pressure on the nitrogen activity coefficient. The calculation results were in good agreement with the measured values. The influences of temperature, nitrogen partial pressure and chemical composition on the nitrogen solubility in molten stainless steel are discussed based on the calculated results. It is possible to produce high nitrogen steels at normal pressure by optimizing the design of the alloy composition and controlling the lowest melting temperature from a thermodynamic point of view.
doi_str_mv 10.1002/srin.200506090
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source Wiley-Blackwell Journals
subjects Alloy steels
Concentration (composition)
ferritic stainless steel
high nitrogen steel
Mathematical models
Nitrogen
nitrogen solubility
Partial pressure
Solubility
stainless steel
Stainless steels
Steels
thermodynamic model
title The Nitrogen Solubility in Molten Stainless Steel
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