Optimization on Reducing Slag Entrapment in 150 × 1270 mm Slab Continuous Casting Mold

Wang, Yang; Yang, Shufeng; Wang, Rui; Li, Jingshe

doi:10.3390/ma12111774

Cited by 13 publications

(7 citation statements)

References 24 publications

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“…In addition, as is shown in Figure 10 , the peeling width of the TCFSS strip decreased as the degree of overheating increased and increased as the casting speed increased. This is because the increased degree of overheating [ 12 ] increased the fluidity of the molten steel [ 18 ]. Furthermore, a decrease in the casting speed results in the adequate floating of titanium oxide, aluminum oxide, and titanium nitride [ 19 ], which effectively reduces clogging in the steel nozzle and inhibits the formation of peeling defects on the surface of the cold-rolled steel strip.…”

Section: Resultsmentioning

confidence: 99%

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Optimization of Continuous Casting for Preventing Surface Peeling Defects on Titanium-Containing Ferrite Stainless Steel

Feng

Lin

Chen³

et al. 2023

Materials

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The surfaces of cold-rolled titanium-containing ferrite stainless steel (TCFSS) strips produced from scrap are prone to severe peeling owing to cracking near slab inclusions during hot rolling. In this study, the Taguchi method was used to prevent peeling defects and clogging of the submerged entrance nozzle, and the optimal casting parameters, such as the degree of casting overheating, casting speed, stirring time, and inclination, were determined. The results showed that increasing the degree of casting overheating and decreasing the casting speed prevented clogging and effectively mitigated peeling defects. Sample A3B1C3D2 had the optimal parameters to reduce the clog thickness to less than 1.5 mm, i.e., a degree of overheating of 60 °C, a casting speed of 0.80 m/min, a stirring time of 12.0 s, and an inclination angle of 6.0°. Sample A3B1C1D3 had the optimal parameters to prevent peeling defects, i.e., a degree of overheating of 60 °C, a casting speed of 0.80 m/min, a stirring time of 10.0 s, and an inclination angle of 6.2°. When casting using these optimal parameters, no peeling defects were observed on the surfaces of the TCFSS strips. The TCFSS strips produced using the optimized parameters exhibited the required mechanical properties and satisfied the design criteria. The parameters included a tensile strength of ≥415 MPa, a yield strength of ≥205 MPa, an elongation of ≥22%, and a hardness of ≤89 HRB.

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Section: Resultsmentioning

confidence: 99%

“…However, breakout may occur at high casting speeds owing to the thin solidified shell [ 10 ]. In previous studies, casting speeds of less than 2 m/min have been applied (for example, 0.6–1.4 m/min [ 7 ], 1.3 m/min [ 11 ], 1.6–1.8 m/min [ 12 ], and 0.7 m/min [ 13 ]).…”

Section: Introductionmentioning

confidence: 99%

Optimization of Continuous Casting for Preventing Surface Peeling Defects on Titanium-Containing Ferrite Stainless Steel

Feng

Lin

Chen³

et al. 2023

Materials

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“…This is because increasing the overheat [18][19] increases the uidity of molten steel [20][21]. Further, a decrease in the casting speed results in adequate oating of Ti oxide, Al oxide, and Ti nitride [22][23][24][25][26], which effectively reduces clogging in the steel nozzle and inhibits the formation of peeling defects on the surface of the cold-rolled steel strip.…”

Section: Relationship Between the Casting Parameters And Surface Qual...mentioning

confidence: 99%

Optimization of continuous casting for preventing the surface peeling defects of Ti-containing ferrite stainless steel

Feng¹,

Lin²,

Chen

et al. 2022

Preprint

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Owing to the durability of stainless steel, stainless steel components can be effectively reused, remanufactured, and indefinitely recycled. The production of stainless steel from scrap is expected to be a trend in the future to achieve a circular economy. However, the surface of cold-rolled Ti-containing ferrite stainless steel strips produced from scrap is prone to severe peeling. In this study, it was found that peeling defects were caused by cracking near slab inclusions during hot rolling. These inclusions mainly comprised Ti oxides, Ti nitrides, and Al oxides generated from clogged and submerged entrance nozzles. To prevent peeling defects and the clogging of the submerged entrance nozzle, the Taguchi method was used and the optimal casting parameters, such as casting overheating, casting speed, stirring time, and inclination, were determined. Increasing casting overheating and decreasing the casting speed inhibited clogging and effectively mitigated peeling defects. When casting overheat was fixed at 60°C with a casting speed in the range of 0.8–0.9 m/min, no peeling defects on the surface of the steel strip were observed. The steel strip produced using the optimized parameters fulfilled the required mechanical properties (tensile strength ≥ 415 MPa, yield strength ≥ 205 MPa, elongation ≥ 22%, and hardness ≤ 89 HRB) and design criteria.

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“…The mold remains the last stage in the continuous casting process, where the proper implementation of processes can lead to significant inclusion removal. To properly control nonmetallic inclusions during the continuous casting process, it is of the utmost importance to understand the inclusion motion behavior in the continuous casting mold [ 2 , 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

Simulation of Inclusion Particle Motion Behavior under Interfacial Tension in Continuous Casting Mold

Siddiqui

Albaqami²,

Arifudin³

et al. 2022

Materials

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Inclusions entrapped by the solidifying front during continuous casting adversely affect the properties of the final steel products. In this study, we investigated the effect of the interfacial tension due to surfactant concentration, particularly sulfur, on alumina inclusion motion behavior during molten steel solidification in a continuous casting mold. A two-dimensional numerical model was developed in Ansys Fluent software to simulate the inclusion motion in a continuous casting mold. Further, the impacts of different values of the alumina inclusion diameter, sulfur concentration, and melt temperature were studied to understand the inclusion motion behavior. The inclusion diameter affected the inclusion distribution throughout the domain. The alumina inclusion entrapment percentage varied in the case of sulfur mixing (using an empirical relationship for modeling). It was found that the removal percentage varied according to the sulfur concentration. The addition of sulfur at concentrations from 10 ppm to 70 ppm resulted in a 4% increase in the removal of alumina inclusions (trapped in the solidifying shell), except for the 100-ppm case. Smaller-sized inclusion particles had a 25% higher chance of entrapment at the top level of the mold. Under the effect of a higher surface tension gradient between inclusions and the melt, the predicted findings show that inclusions were vulnerable to engulfment by the solidification front.

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Optimization on Reducing Slag Entrapment in 150 × 1270 mm Slab Continuous Casting Mold

Cited by 13 publications

References 24 publications

Optimization of Continuous Casting for Preventing Surface Peeling Defects on Titanium-Containing Ferrite Stainless Steel

Optimization of Continuous Casting for Preventing Surface Peeling Defects on Titanium-Containing Ferrite Stainless Steel

Optimization of continuous casting for preventing the surface peeling defects of Ti-containing ferrite stainless steel

Simulation of Inclusion Particle Motion Behavior under Interfacial Tension in Continuous Casting Mold

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