Tracking Large-size Inclusions in Al Deoxidated Tinplate Steel in Industrial Practice

Li, Xiaoao; Wang, Nan; Chen, Min; Ma, Tiantian

doi:10.2355/isijinternational.isijint-2020-679

Cited by 5 publications

(1 citation statement)

References 30 publications

(29 reference statements)

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“…There have been some previous studies conducted on large‐size inclusions in steel using large sample electrolysis method. Li and Wang et al [ 15 ] investigated samples taken at various stages of the production process of tinplate steel, including the end of RH refining (Ruhrstahl–Hereaeus refining, a kind of refining method for cyclic degassing under vacuum conditions), tundish, continuous casting slab, and hot‐rolled plate. They extracted the large‐size inclusions from these samples by large sample electrolysis method to study the three‐dimensional morphologies, weight ratios, sizes, and chemical compositions of the inclusions.…”

Section: Introductionmentioning

confidence: 99%

Distribution of Large‐Size Inclusions in Transition Slabs for Automotive Exposed Panel Steel

Ren,

Zhi,

Fan

et al. 2023

steel research int.

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In order to improve the quality of the transition slabs, the large‐size inclusions in 28 m‐long transition slabs are studied by large sample electrolysis and thermodynamic analysis. The results reveal that the length of transition slabs influenced by ladle exchange is 17 m, which is 4 m before the second steel ladle casting and 13 m after the casting. Large‐size inclusions in transition slabs can be divided into five kinds of Al2O3, Al2O3‐CaO, Al2O3‐CaO‐SiO2, Al2O3‐CaO‐MgO, and entrapment slag. The average contents of total inclusions, the inclusions in the range of 30–100 μm, those of 100–200 μm, and those larger than 200 μm in the transition slabs are 4.8, 19, 2.8, and 4.2 times higher than those in the normal slabs, respectively. For the large inclusions greater than 200 μm, the average contents of the Al2O3, Al2O3‐CaO‐SiO2 inclusions, and entrapment slags significantly increase in the transition slabs, being 9.4, 13.1, and 2.4 times higher than those in the normal slabs, respectively. The sources of Al2O3, Al2O3‐CaO‐SiO2 inclusions, and entrapment slags should be the secondary oxidation in tundish, entrapment of tundish flux, and entrapment of mold powders, respectively.

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Section: Introductionmentioning

confidence: 99%

Distribution of Large‐Size Inclusions in Transition Slabs for Automotive Exposed Panel Steel

Ren,

Zhi,

Fan

et al. 2023

steel research int.

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A Novel Nonmetallic Inclusion in High‐Mn and High‐Al Steel Caused by the Interfacial Reaction Between Steel and Ladle Filler Sand

Li,

Zang,

Zhang

et al. 2024

steel research int.

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The influence of chromium‐bearing filler sand on the transformation of inclusions in high‐Mn and high‐Al steel under various reaction times and Mn content levels is studied, and the mechanism of filler sand intrusion into the steel matrix is analyzed. It is demonstrated that an inclusion containing Cr2O3 is discovered. The evolution pathway of oxide inclusions is identified as Al2O3–MnO → Al2O3–MnO–SiO2 → Al2O3–MnO–SiO2–Cr2O3(Cr2O3 + MnO–SiO2) → Al2O3–MnO–Cr2O3–MgO·Al2O3. It is noteworthy that Cr2O3 inclusions tend to diffuse from the outside inward, but the internal content remains almost unchanged, which is due to the strong diffusion hindrance of SiO2. The formation of a liquid phase in the filler sand is a necessary condition for its infiltration into the steel matrix. The critical liquid‐phase content that results in the formation of Cr2O3 inclusions is 42%, which contains 5–8% of Cr2O3. The formation of pore channels provides favorable conditions for sand penetration, with the maximum penetration depth reaching up to 29 mm. Large sand inclusion particles reach millimeter scale in size and are distributed quite randomly. Chemical reactions at the steel/sand interface can lead to an increase in the total oxygen (T.O) content in the steel. The reaction time has little effect on the T.O content, while the Mn content in the steel has a significant impact, with an increase of up to 41 ppm. During the smelting stage, the filler sand can enter the molten steel, thereby affecting the quality of the product.

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Trajectory Tracking of Wheeled Mobile Robot Based on Model Predictive Control without Terminal Constraints

Han,

Gao,

Gao

2023

2023 5th International Conference on Industrial Artificial Intelligence (IAI)

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Tracking Large-size Inclusions in Al Deoxidated Tinplate Steel in Industrial Practice

Cited by 5 publications

References 30 publications

Distribution of Large‐Size Inclusions in Transition Slabs for Automotive Exposed Panel Steel

Distribution of Large‐Size Inclusions in Transition Slabs for Automotive Exposed Panel Steel

A Novel Nonmetallic Inclusion in High‐Mn and High‐Al Steel Caused by the Interfacial Reaction Between Steel and Ladle Filler Sand

Trajectory Tracking of Wheeled Mobile Robot Based on Model Predictive Control without Terminal Constraints

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