In-depth analysis on the mechanism and reaction efficiency of hydrogen deoxidation in ultra-low carbon steel

Lyu, Ziyu; Gu, Chao; Wang, Zhongliang; Bao, Yanping

doi:10.1016/j.surfin.2024.105284

Surfaces and Interfaces

2024

DOI: 10.1016/j.surfin.2024.105284

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In-depth analysis on the mechanism and reaction efficiency of hydrogen deoxidation in ultra-low carbon steel

Ziyu Lyu,

Chao Gu,

Zhongliang Wang

et al.

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2024

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Thermodynamic Constraints and Prospects for Intensified Steel Deoxidation

Holappa,

Nurmi

2024

steel research int.

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The thermodynamic constraints of steel deoxidation are discussed based on calculated [%Me]–[%O] diagrams for different deoxidizing elements in pure Fe and five examples of steel grades, highlighting the influence of alloying on the equilibria. The role of deoxidation product oxides is considered with special emphasis on the activity of SiO2 and the possibility of utilizing slags with a very low aSiO2 to amplify the deoxidizing power of silicon. This effect was verified for SiCr spring steel and 18Cr8Ni stainless steel. The results indicate a strong reduction in equilibrium oxygen content. Different means for industrial implementation of this principle are discussed. The conventional steel/slag equilibration via gas stirring is tested in practice. As potentially more efficient methods, slag powder injection (argon, lance) and cored wire injection combined with argon bubbling are studied. In such treatments, specific tailored slag additives can be used for divergent steel grades to optimize steel cleanliness and inclusion engineering.

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Thermodynamic Constraints and Prospects for Intensified Steel Deoxidation

Holappa,

Nurmi

2024

steel research int.

View full text Add to dashboard Cite

show abstract

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In-depth analysis on the mechanism and reaction efficiency of hydrogen deoxidation in ultra-low carbon steel

Cited by 1 publication

References 41 publications

Thermodynamic Constraints and Prospects for Intensified Steel Deoxidation

Thermodynamic Constraints and Prospects for Intensified Steel Deoxidation

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