Solubility of Nitrogen in Superaustenitic Stainless Steels During Air Induction Melting

Chandrasekar, A.; Anburaj, J.; Narayanan, R.; Balusamy, V.; Nazirudeen, S.S. Mohamed

doi:10.1007/s11665-012-0364-3

Cited by 6 publications

(1 citation statement)

References 17 publications

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“…Mathematical modeling of the combined side and top blowing AOD refining process of stainless steel has been studied by Wei et al [14] Surface tension and composition of gas-iron alloy inter phase were calculated by Riipi et al for Fe-N-S-O system using the modified form of Butler's equations and the derived values of the surface interaction parameters of the system. [7] The effect of alloying element and temperature on nitrogen solubility based on thermodynamic criteria has been studied by Siwka et al [15] The feasibility of manufacturing of nitrogen-alloyed SASS steel in the conventional melting technique using nitrated ferro-chromium has been investigated by Chandrasekar et al [16] Several investigations have been so far reported on the solubility of nitrogen in binary Fe-X (X¼C, Al, Si, Mn, Ni, Cr). [13,17] Anson et al measured nitrogen solubility of the alloys targeting duplex stainless steels whose composition ranged Fe-Cr-Ni-Mo-Mn by sampling method.…”

Section: Introductionmentioning

confidence: 99%

Prediction of Nitrogen Content of Steel Melt during Stainless Steel Making Using AOD Converter

Patra¹,

Nayak

Singhal³

et al. 2016

steel research int.

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A mathematical model has been developed to predict nitrogen content in steel melt with respect to blowing time for making different grades (e.g., 304L, 204Cu, and 18Cr–18Mn–0.5N) of stainless steel using AOD converter. Firstly, bath composition and temperature are calculated based on thermodynamic modeling of refining reactions. Then bath nitrogen content is predicted considering the influence of the bath temperature and composition variation as well as the kinetics of nitrogen absorption and desorption of steel melt. Flux and alloy additions are also taken in account for developing this model. For the purpose of development and validation of the mathematical model for predicting nitrogen content of molten steel, the required plant data is obtained from stainless steel making process performed in a 50 ton AOD converter which is equipped with a top lance and five sidewall nozzles at Jindal Stainless Ltd., Hisar in India. This mathematical model will be effective and beneficial because nitrogen prediction by this model corresponds well with actual measured values collected from steel plant. This numerical model will also help in achieving optimum as well as effective use of argon gas and critical control over final nitrogen content in stainless steels.

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Section: Introductionmentioning

confidence: 99%

Prediction of Nitrogen Content of Steel Melt during Stainless Steel Making Using AOD Converter

Patra¹,

Nayak

Singhal³

et al. 2016

steel research int.

View full text Add to dashboard Cite

show abstract

Effect of Boron on the Solidification Characteristics and Constitutive Equation of S31254 Superaustenitic Stainless Steel

Liu,

Wang,

Chen

et al. 2024

steel research int.

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Solidification structure and segregation behavior of S31254 superaustenitic stainless steel ingot containing 0 wt% B and 0.005 wt% B are investigated. The results show that serious element segregation and massive eutectics are present in the center of the ingot. By contrast, the addition of boron reduces the secondary dendrite spacing, the degree of elemental segregation, and the σ phase. Further, the effect of boron on the solidification process is studied by using the high‐temperature confocal laser scanning microscope and combined with Thermo‐Calc thermodynamic simulation results. The results show that boron can widen the solidification temperature range and greatly retard the matrix solidification. The role of boron in refining dendrite structure and inhibiting precipitation is further confirmed. The effect of boron on the constitutive equation of S31254 superaustenitic stainless steel has also been researched through isothermal compression testing in the temperature range of 950–1200 °C and strain rate range of 0.01–10 s−1. The activation energy of the boron‐free and boron‐containing S31254 superaustenitic stainless steels based on the constitutive equation are 427.77 and 495.80 kJ mol−1, respectively. Processing maps indicate that the instability domain is significantly reduced and the hot ductility is improved after the addition of B.

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Comparative Study on Intergranular Corrosion Characteristics of Cast Duplex Stainless Steel Stabilized with Zirconium

Kumar

Babu

Varghese

2017

Metallogr. Microstruct. Anal.

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Solubility of Nitrogen in Superaustenitic Stainless Steels During Air Induction Melting

Cited by 6 publications

References 17 publications

Prediction of Nitrogen Content of Steel Melt during Stainless Steel Making Using AOD Converter

Prediction of Nitrogen Content of Steel Melt during Stainless Steel Making Using AOD Converter

Effect of Boron on the Solidification Characteristics and Constitutive Equation of S31254 Superaustenitic Stainless Steel

Comparative Study on Intergranular Corrosion Characteristics of Cast Duplex Stainless Steel Stabilized with Zirconium

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