Composition design of CaO-Al<sub>2</sub>O<sub>3 </sub>series low reactivity continuous casting molding flux for high titanium steel

Wang Xingjuan; Wang Yu; Zhu Liguang; Di Tiancheng; Jin Hebin; Piao Zhanlong

doi:10.7513/j.issn.1004-7638.2022.04.021

Volume 43 Issue 4

Sep. 2022

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Article Navigation > IRON STEEL VANADIUM TITANIUM > 2022 > 43(4): 134-141

Wang Xingjuan, Wang Yu, Zhu Liguang, Di Tiancheng, Jin Hebin, Piao Zhanlong. Composition design of CaO-Al2O3 series low reactivity continuous casting molding flux for high titanium steel[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(4): 134-141. doi: 10.7513/j.issn.1004-7638.2022.04.021

Citation:

Wang Xingjuan, Wang Yu, Zhu Liguang, Di Tiancheng, Jin Hebin, Piao Zhanlong. Composition design of CaO-Al₂O₃series low reactivity continuous casting molding flux for high titanium steel[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(4): 134-141. doi: 10.7513/j.issn.1004-7638.2022.04.021

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Composition design of CaO-Al₂O₃series low reactivity continuous casting molding flux for high titanium steel

doi: 10.7513/j.issn.1004-7638.2022.04.021

Wang Xingjuan^{1, 2
,},
Wang Yu^{1, 2},
Zhu Liguang^{3
,
,},
Di Tiancheng^{1, 2},
Jin Hebin^{1, 2},
Piao Zhanlong²

1.
College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, Hebei, China
2.
Hebei High Quality Steel Continuous Casting Technology Innovation Center, Tangshan 063000, Hebei, China
3.
School of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050000, Hebei, China

Received Date: 2022-03-11
Publish Date: 2022-09-14

Abstract

Abstract

In the continuous casting process of high-titanium steel, the traditional CaO-SiO₂-Al₂O₃ mold slag will produce a violent steel/slag interface reaction, which will affect the continuous casting process stability. In order to weaken the interface reaction of steel/slag, a low reactivity mold flux for casting high titanium steel had been designed and the feasibility of CaO-Al₂O₃ based mold flux had been determined through the thermodynamic calculation of the steel slag interface by using Factsage thermodynamic software to calculate the composition range of the low reactivity mold flux. The viscosity and melting point of the three groups of mold slag were measured by rotary viscosity tester and automatic slag melting point and melting rate tester, and the newly developed mold slag suitable for continuous casting production was tested by VSgr-60-2000 vacuum atmosphere pressure sintering furnace. The CaO/Al₂O₃ in newly developed mold flux at 1.1, with addition of 10%CaF₂, 7%MgO, 5%Na₂O, 3%K₂O, 13%B₂O₃ and 5%SiO₂, its viscosity measured by viscometer is 0.413 Pa·s, and the melting point is 1106 ℃. After the steel/slag interface reaction test, the Ti content in the steel decreases by 0.03%, and the TiO₂ content in the mold slag increases by 0.002%, and the interface reaction is weak. The newly developed mold slag can extremely suppress the progress of the interfacial reaction of steel/slag.
- continuous casting,
- high titanium steel,
- low reactivity mold flux,
- interface reaction,
- Factsage thermodynamics calculation,
- interface properties

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References(21)

References

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