Influence Mechanism of Crucible Materials on Cleanliness and Inclusion Characteristics of High-Nitrogen Stainless Bearing Steel During Vacuum Carbon Deoxidation

Li, Huabing; Lu, Peng-Chong; Feng, Hao; Zhang, Peng-Fei; Zhang, Shucai

doi:10.1007/s11663-023-02743-2

Metall Mater Trans B

2023

DOI: 10.1007/s11663-023-02743-2

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Influence Mechanism of Crucible Materials on Cleanliness and Inclusion Characteristics of High-Nitrogen Stainless Bearing Steel During Vacuum Carbon Deoxidation

Huabing Li

Peng-Chong Lu

Hao Feng

et al.

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Cited by 6 publications

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Cerium Addition Improves Cleanliness and Refines Microstructure of As‐Cast High‐Nitrogen Stainless Bearing Steel

Lu,

Feng,

et al. 2023

steel research int.

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High‐nitrogen stainless bearing steel (HNSBS) is the most representative third‐generation aviation bearing steel, and the cleanliness and microstructure characteristics of bearing steel are crucial to its high performance and long service life. In this work, the effect of cerium addition on the cleanliness and microstructure characteristics of as‐cast HNSBS was systematically studied by combining microstructural characterization and thermodynamic analysis methods. The results show that with increasing Ce content, the cleanliness of steel first improved and then decreased, and Ce2O2S, Ce2O3 and CeN inclusions were generated successively. The Ce content should be controlled to ≈0.012 wt% to ensure that all Al2O3, MgO · Al2O3, and MnS inclusions were modified, and minimize the formation of large‐size Ce‐bearing inclusions. Furthermore, cerium addition refined the dendrite structure due to more nucleation sites for γ‐Fe and the enrichment of Ce in the liquid phase at solidifying front. The finer and more dispersed distribution in precipitates was ascribed to the reduction of growth space and Cr segregation, as well as the increase in effective nucleation sites. These results can offer theoretical guidance for inhibiting the formation of harmful inclusions in high‐nitrogen alloy systems and refining the microstructure of alloy systems containing M23(C, N)6 and M2(C, N) precipitates.

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Cerium Addition Improves Cleanliness and Refines Microstructure of As‐Cast High‐Nitrogen Stainless Bearing Steel

Lu,

Feng,

et al. 2023

steel research int.

Self Cite

View full text Add to dashboard Cite

show abstract

Cleanliness Improvement and Microstructure Refinement of As-Cast High-Nitrogen Stainless Bearing Steel by Magnesium Treatment

Lu,

Feng,

et al. 2024

Metall Mater Trans B

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Deoxidation of Nickel-based Superalloy Using Carbon under High Vacuum Degree

Li,

Feng,

et al. 2024

Metall Mater Trans B

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Influence Mechanism of Crucible Materials on Cleanliness and Inclusion Characteristics of High-Nitrogen Stainless Bearing Steel During Vacuum Carbon Deoxidation

Cited by 6 publications

References 54 publications

Cerium Addition Improves Cleanliness and Refines Microstructure of As‐Cast High‐Nitrogen Stainless Bearing Steel

Cerium Addition Improves Cleanliness and Refines Microstructure of As‐Cast High‐Nitrogen Stainless Bearing Steel

Cleanliness Improvement and Microstructure Refinement of As-Cast High-Nitrogen Stainless Bearing Steel by Magnesium Treatment

Deoxidation of Nickel-based Superalloy Using Carbon under High Vacuum Degree

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