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Article

Research on the Solidification Structure, Properties and Composition Segregation of GCr15 Bearing Steel Under Double-Electrode Regulation

by
Qinghe Xiao
1,
Shengli Li
1,
Siyao Liu
1,
Jiyu Zhao
1,
Xingang Ai
1,
Ye Zhou
1,*,
Xincheng Miao
1,* and
Min Wang
2,*
1
School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, China
2
Technical Support Center for Prevention and Control of Disastrous Accidents in Metal Smelting, University of Science and Technology Beijing, Beijing 100083, China
*
Authors to whom correspondence should be addressed.
Metals 2025, 15(10), 1086; https://doi.org/10.3390/met15101086
Submission received: 30 July 2025 / Revised: 20 September 2025 / Accepted: 25 September 2025 / Published: 29 September 2025
(This article belongs to the Special Issue Green Super-Clean Steels)
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Abstract

To explore the influence of double-electrode regulation technology on the solidification microstructure and properties of GCr15 bearing steel, the double-electrode insertion process was employed in this study, combined with metallographic analysis, mechanical property testing, and electron probe composition characterization. We analyzed the mechanisms of solidification microstructure evolution and mechanical property improvement, as well as the composition segregation control effect, of GCr15 steel under double-electrode regulation. The results show that the double-electrode technology significantly refines the microstructure and improves the internal quality of the ingot by optimizing the temperature field and electromagnetic field distribution in the molten pool and enhancing the internal flow of the melt. The tensile strengths in the upper and middle parts were increased by 84.6% and 29.6%, respectively, which can be attributed to the uniform distribution of carbides at the grain boundaries and the reduction of segregation. Composition analysis indicates that the macroscopic segregation index of C element was decreased under the dual-electrode process. This research provides a theoretical basis and process optimization direction for the high-quality preparation of high-carbon chromium bearing steel.
Keywords: double electrodes; GCr15 bearing steel; solidification microstructure; compositional segregation; mechanical properties double electrodes; GCr15 bearing steel; solidification microstructure; compositional segregation; mechanical properties

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MDPI and ACS Style

Xiao, Q.; Li, S.; Liu, S.; Zhao, J.; Ai, X.; Zhou, Y.; Miao, X.; Wang, M. Research on the Solidification Structure, Properties and Composition Segregation of GCr15 Bearing Steel Under Double-Electrode Regulation. Metals 2025, 15, 1086. https://doi.org/10.3390/met15101086

AMA Style

Xiao Q, Li S, Liu S, Zhao J, Ai X, Zhou Y, Miao X, Wang M. Research on the Solidification Structure, Properties and Composition Segregation of GCr15 Bearing Steel Under Double-Electrode Regulation. Metals. 2025; 15(10):1086. https://doi.org/10.3390/met15101086

Chicago/Turabian Style

Xiao, Qinghe, Shengli Li, Siyao Liu, Jiyu Zhao, Xingang Ai, Ye Zhou, Xincheng Miao, and Min Wang. 2025. "Research on the Solidification Structure, Properties and Composition Segregation of GCr15 Bearing Steel Under Double-Electrode Regulation" Metals 15, no. 10: 1086. https://doi.org/10.3390/met15101086

APA Style

Xiao, Q., Li, S., Liu, S., Zhao, J., Ai, X., Zhou, Y., Miao, X., & Wang, M. (2025). Research on the Solidification Structure, Properties and Composition Segregation of GCr15 Bearing Steel Under Double-Electrode Regulation. Metals, 15(10), 1086. https://doi.org/10.3390/met15101086

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