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Estimation of the Temperature-Dependent Nitrogen Solubility in Stainless Fe-Cr-Mn-Ni-Si-C Steel Melts During Processing

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Abstract

The influence of chemical composition, temperature, and pressure on the nitrogen solubility of various high alloy stainless steel grades, namely Fe-14Cr-(0.17-7.77)Mn-6Ni-0.5Si-0.03C [wt pct], Fe-15Cr-3Mn-4Ni-0.5Si-0.1C [wt pct], and Fe-19Cr-3Mn-4Ni-0.5Si-0.15C [wt pct], was studied in the melt. The temperature-dependent N-solubility was determined using an empirical approach proposed by Wada and Pehlke. The thus calculated N-concentrations overestimate the actual N-solubility of all the studied Fe-Cr-Mn-Ni-Si-C steel melts at a given temperature and pressure. Consequently, the calculation model has to be modified by Si and C because both elements are not recognized in the original equation. The addition of the 1st and 2nd order interaction parameters for Si and C to the model by Wada and Pehlke allows a precise estimation of the temperature-dependent nitrogen solubility in the liquid steel bath, and fits very well with the measured nitrogen concentrations during processing of the steels. Moreover, the N-solubility enhancing effect of Cr- and Mn-additions has been demonstrated.

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Acknowledgments

The financial support of this research by the German Research Foundation (DFG) within the framework of the Collaborative Research Center 799 (CRC 799) is gratefully acknowledged.

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Authors and Affiliations

  1. Institute of Iron and Steel Technology, TU Bergakademie Freiberg, 09599, Freiberg, Germany

    Marco Wendler, Michael Hauser, Eckhard Frank Sandig & Olena Volkova

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  1. Marco Wendler
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  2. Michael Hauser
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  3. Eckhard Frank Sandig
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  4. Olena Volkova
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Correspondence to Marco Wendler.

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Manuscript submitted August 9, 2017.

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Wendler, M., Hauser, M., Sandig, E.F. et al. Estimation of the Temperature-Dependent Nitrogen Solubility in Stainless Fe-Cr-Mn-Ni-Si-C Steel Melts During Processing. Metall Mater Trans B 49, 581–589 (2018). https://doi.org/10.1007/s11663-017-1165-8

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  • DOI: https://doi.org/10.1007/s11663-017-1165-8

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