Study on the composite inclusions of MnS-Al<sub>2</sub>O<sub>3</sub> in wheel steel

Ding Xiaoming; Li Tao; Guo Xiaopei; Zhuang Qianyu; Liu Kai

doi:10.7513/j.issn.1004-7638.2023.04.026

Volume 44 Issue 4

Aug. 2023

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Ding Xiaoming, Li Tao, Guo Xiaopei, Zhuang Qianyu, Liu Kai. Study on the composite inclusions of MnS-Al2O3 in wheel steel[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(4): 183-189. doi: 10.7513/j.issn.1004-7638.2023.04.026

Citation:

Ding Xiaoming, Li Tao, Guo Xiaopei, Zhuang Qianyu, Liu Kai. Study on the composite inclusions of MnS-Al₂O₃ in wheel steel[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(4): 183-189. doi: 10.7513/j.issn.1004-7638.2023.04.026

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Study on the composite inclusions of MnS-Al₂O₃ in wheel steel

doi: 10.7513/j.issn.1004-7638.2023.04.026

Ding Xiaoming^{1, 2
,},
Li Tao^{3
,
,},
Guo Xiaopei⁴,
Zhuang Qianyu²,
Liu Kai³

1.
Beijing Institute of Aeronautical Materials, AECC, Beijing 100095, China
2.
Aviation Materials Guochuang (Qingdao) High-speed Railway Materials Research Institute Co., Ltd., Qingdao 266109, Shandong，China
3.
College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, Hebei，China
4.
School of Materials Science and Engineering, Chongqing University, Chongqing 400044, China

Received Date: 2022-09-13
Publish Date: 2023-08-30

Abstract

Abstract

The composite inclusions of MnS-Al₂O₃ in high-speed railway wheel steel can reduce the effect of Al₂O₃ on fatigue properties of wheel steel. In this study, the types of inclusions in wheel steel were determined as MnS, Al₂O₃ and MnS-Al₂O₃ composite inclusions by testing wheel steel prepared in laboratory. The inclusions of Al₂O₃ were extracted by acid dissolution method. XRD results showed that crystal texture of Al₂O₃ inclusion in steel was α-Al₂O₃. The composite inclusion in steel was extracted by non-aqueous electrolysis method, and the morphology of MnS-Al₂O₃ composite inclusion was detected. Based on the thermodynamic calculation of steel composition, the relationship between the solidus and liquidus temperatures of experimental steel and the precipitation temperature of inclusions was analyzed. The results show that Al₂O₃ inclusions in wheel steel can provide nucleation sites for the precipitation of MnS. It was clarified that the surface of (100) of MnS can precipitate on the Al₂O₃ (0001) through the calculation of the mismatch between the two phases of MnS and Al₂O₃. This works provides a theoretical basis for the formation of MnS-Al₂O₃ composite inclusions in steel and the reduction of the damage of Al₂O₃ inclusions.
- wheel steel,
- composite inclusions,
- MnS-Al₂O₃,
- mismatch,
- non-aqueous electrolysis

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References(23)

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