Abstract
High-nitrogen stainless steel exhibits remarkable toughness and corrosion resistance, which can make it widely used in diverse fields such as marine engineering and biomedicine. Simultaneously, the presence of the M2(C, N) phase, functioning as a secondary phase particle, significantly enhances the mechanical properties of high-nitrogen stainless steel. Therefore, this study focuses on FeCr17Mn11Mo3Nx powder as the research material, choosing JMatPro thermodynamic software to compute the composition of precipitated phases, solidification paths, and pitting corrosion resistance across varying nitrogen contents. The results indicate that with an increase in nitrogen content from 0.703 wt% to 1.010 wt%, the content of the M2(C, N) phase will increase from 6.09 wt% to 8.82 wt%. There are two solidification paths can be observed: L → L + α → L + α + γ and L → L + γ → L + γ + α. Time–temperature-transformation (TTT) curves demonstrate that higher nitrogen content can increase the cooling rate of the M2(C, N) phase. Furthermore, elevated nitrogen content results in increased material hardness and strength.
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Acknowledgements
The authors are grateful for the support from the National Natural Science Foundation of China (No. 52304351), Natural Science Foundation of Hebei Province, China (No. E2022209136 and No. E2021209146), Science and Technology Project of Hebei Education Department, China (No. BJK2023073), Tangshan Science and Technology Plan Project (No. 22130202G).
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Wang, D., Ni, G., Wang, S., Liu, J. (2024). Thermodynamic Calculations of Precipitate Phases in FeCr17Mn11Mo3Nx Powder Based on JMatPro. In: TMS 2024 153rd Annual Meeting & Exhibition Supplemental Proceedings. TMS 2024. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-031-50349-8_82
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DOI: https://doi.org/10.1007/978-3-031-50349-8_82
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