Addition of MgO Nanoparticles to Carbon Structural Steel and the Effect on Inclusion Characteristics and Microstructure

Gao, Xifeng; Yang, Shufeng; Li, Jingshe; Liao, Hang; Wu, Tianhui

doi:10.1007/s11663-015-0552-2

Cited by 16 publications

(19 citation statements)

References 33 publications

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“…In this study, MgO nanoparticles acted as the precipitation core to refine the inclusion size. MgO was a thermally stable inclusion in the steel melt, and tended to disperse well in the melt due to the relatively weak affinity among individual particles . Therefore, dispersed MgO particles could finely disperse the total mass of inclusions in steel, which resulted in decreased inclusion size range.…”

Section: Methodsmentioning

confidence: 99%

“…The dispersion process of MgO and AlTi nanoparticles was performed using a planetary ball mill (IKN Mechanical Equipment Co., Ltd, Germany). The detailed operational parameters and processes can be found in ref . The mixed nanoparticles were poured into the liquid steel through a charging hopper located under the furnace cover.…”

Section: Methodsmentioning

confidence: 99%

“…In the author's previous research, an innovative approach for pre‐dispersing MgO nanoparticles with AlSi alloy nanoparticles was established. The small‐sized inclusions could be obtained through adding such nanoparticles into the liquid steel bath.…”

Section: Introductionmentioning

confidence: 99%

“…The small‐sized inclusions could be obtained through adding such nanoparticles into the liquid steel bath. For the laboratory high temperature experiment, these nanoparticles could be added into the liquid steel with a molybdenum rod in a high‐temperature electric pipe furnace . For an actual production, the nanoparticles could be added into molten steel within the mold in the vicinity of the submerged nozzle outlet .…”

Section: Introductionmentioning

confidence: 99%

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Improvement of Utilization Ratio of Nanoparticles in Steel and Its Influence on Acicular Ferrite Formation

Gao

Yang²,

Li³

et al. 2017

steel research int.

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In the present study, 35MnVS experimental steels containing nanoparticles are manufactured using a vacuum induction furnace (VIF), as well as a vacuum induction levitation furnace (VILF). The differences on the utilization ratio of nanoparticles (URN), inclusion characteristics, and steel microstructure between the original steel and experimental steels are compared. The results reveal that the steel processed with a VILF has a higher URN that helps to form a finer inclusion size range. There is a critical size for each inclusion, and only when the inclusion size is the critical value, the inclusions can efficiently induce acicular ferrites (AF). Among the three steels, only the inclusion size range of the VILF steel is less than the critical size which is between %2.2 and %5.2 m. Therefore, the inclusions in VILF steel have a relatively stronger ability on inducing AF, and that is revealed by its microstructure showing large proportions of AF.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Improvement of Utilization Ratio of Nanoparticles in Steel and Its Influence on Acicular Ferrite Formation

Gao

Yang²,

Li³

et al. 2017

steel research int.

Self Cite

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show abstract

“…The addition of the NPs was found to have a significant effect [18,19], although the NPs that entered into the welding pool were found to gather and float to the surface of the steel liquid. Thus, the second-phase particle yield in oxide metallurgy technology is a key problem that must be solved before this production can be applied for real-life applications [20].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Core-Shell MgO Alloy Nanoparticles for Steelmaking

Yang

Guo

et al. 2018

Coatings

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Abstract:In this present study, we aimed to reduce the wetting angle of nanoparticles (NPs) in molten steel and thus, increase their utilization ratio in steel. In order to achieve this, a two-step process was used to synthesize a core-shell AlTi-MgO@C NP structure for steelmaking through a dopamine polymerization process, which used an ammonium persulfate oxidant and high-temperature carbonization. The NP surface characterization was tested by scanning electron microscopy and field emission transmission electron microscopy, while the hydrodynamic NP size was measured by dynamic light scattering. The results showed that a carbon coating that had a thickness of 10 nm covered the NP surface, with the dispersion and stability of the particles in the aqueous solution having improved after the coating. The contact angle of the surface-treated NP was less than that of the uncoated NP in high-temperature molten steel and the corresponding wetting energy was smaller, which indicated improved wettability.

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Effects of Surface-Modified MgO Nanoparticles on Inclusion Characteristics and Microstructure in Carbon Structural Steel

Guo

Yang

et al. 2018

JOM

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Addition of MgO Nanoparticles to Carbon Structural Steel and the Effect on Inclusion Characteristics and Microstructure

Cited by 16 publications

References 33 publications

Improvement of Utilization Ratio of Nanoparticles in Steel and Its Influence on Acicular Ferrite Formation

Improvement of Utilization Ratio of Nanoparticles in Steel and Its Influence on Acicular Ferrite Formation

Synthesis of Core-Shell MgO Alloy Nanoparticles for Steelmaking

Effects of Surface-Modified MgO Nanoparticles on Inclusion Characteristics and Microstructure in Carbon Structural Steel

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