Thermo-mechanical simulation and parameters optimization for beam blank continuous casting

Chen, W.; Zhang, Y.Z.; Zhang, C.J.; Zhu, Lingkai; Lu, Wei; Wang, B.X.; Ma, Jian

doi:10.1016/j.msea.2007.11.116

Cited by 26 publications

(17 citation statements)

References 4 publications

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“…Compute the air gap thickness and update the comprehensive heat transfer coefficient in order to determine the temperature distribution in the H-beam blank mold in the following step; (5) compute the temperature distribution of the H-beam blank mold; (6) restart the analysis from the last sub-step of the stress analysis. The results of the preceding stress analysis are taken as the loads for the subsequent stress analysis in order to obtain the genetic behavior of stress, which only represents that the stress of this step is related to the stress of the previous step, in this way, the inheritance of stress from the previous step to the next step is realized [15]; (7) repeat Steps (4)-(6) until the strand reaches the end of the mold; (8) the air gap thicknesses at selected points along the surface of the H-beam blank mold are obtained after carrying out steps (1)- (7). By minimizing the air gap thickness at these points, propose a preliminary mold taper scheme and run the simulations for the H-beam blank mold; (9) repeat steps (1)- (7); (10) evaluate the air gap thickness at selected points along the surface of the H-beam blank mold, modify the mold taper design, and run the simulations until the air gap diminishes completely or the air gap is minimized at the mold exit.…”

Section: Multiple Load Step Methodsmentioning

confidence: 99%

“…In previous studies, Chen et al developed a three-dimensional FEM to compute the flow field of molten steel in the beam blank mold and found that the most rational rake angle for the three lateral hole SEN is 9°and the SEN immersion depth is 200-250 mm when casting speed is 0.9-1.1 m·min À1 [6]. Chen et al conducted a transient thermo-mechanical FEM, analyzed the two-dimensional temperature and stress-strain fields of the solidification process in detail and search out the optimum cooling parameters [7]. Chen et al also optimized a cooling water project by using a multiobjective optimization program [8].…”

Section: Introductionmentioning

confidence: 99%

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Mold taper optimization for continuous casting of H-beam blanks

Chen

Yang

Zhu

et al. 2019

Metall. Res. Technol.

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The objective of this study is to optimize the mold taper for continuous casting of H-beam blanks. A thermo-mechanical coupled mathematical model was established to analyze the heat transfer, solidification, and shrinkage of the strand in the mold based on the multiple load step method. Based on the simulation results of the air gap distribution in the mold, the mold taper was optimized at selected points on the surface of H-beam blank mold by minimizing the air gap thickness and the best taper scheme was proposed. The results show that the original mold tapers are relatively larger and the optimum mold tapers are as follows: (1) taper at the flange surface: 0.81%/m; (2) taper at the narrow face: 0.68%/m; (3) taper at the fillet: À1.44%/m. The optimum mold size obtained from taper optimization was used in the actual continuous casting process and based on the results, it can be concluded that the optimum mold taper scheme proposed in this study reduced the formation of surface cracks in H-beam blanks.

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Section: Multiple Load Step Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mold taper optimization for continuous casting of H-beam blanks

Chen

Yang

Zhu

et al. 2019

Metall. Res. Technol.

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“…The authors used the heuristic search technique in order to determine the optimal cooling condition in continuous casting process, good results were obtained in billet quality and casting performance with this condition. Chen et al 15 optimized the process parameters of beam blank continuous casting with focus on quality and productivity of process, via coupled heat and stress models. The results obtained by Chen et al 15 showed that the cracks in casting blanks were reduced of 6% and water demand were decreased by 25% in secondary cooling zone.…”

Section: Introductionmentioning

confidence: 99%

“…Chen et al 15 optimized the process parameters of beam blank continuous casting with focus on quality and productivity of process, via coupled heat and stress models. The results obtained by Chen et al 15 showed that the cracks in casting blanks were reduced of 6% and water demand were decreased by 25% in secondary cooling zone. A continuous casting of copper tube billets with rotating *e-mail: alexandrefurtado@id.uff.br electromagnetic field, was investigated by Xintao et al 11 .…”

Section: Introductionmentioning

confidence: 99%

An Experimental Investigation of Continuous Casting Process: Effect of Pouring Temperatures on the Macrosegregation and Macrostructure in Steel Slab

et al. 2020

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The solidification control is of extreme importance, because it strongly affects the final casting quality sanity. The structure obtained is generally not homogeneous and gives rise to great variations in composition, with position at small and large scales, which is known as segregation. An understanding of the way segregation occurs in continuous casting is of great importance for steels and in designing post-casting processes. As-cast structures are responsible the reduction in both scale and extension of segregation, because mass transport is dependent on the time required to diffuse a solute over a characteristic distance, e.g., the dendrite spacing that the characterizes the solidification structure. In this work, the effect of pouring temperature in steel slabs on the continuous casting processes are systematically investigated. Relationships between pouring temperature (P T) and center macrosegregation was qualitatively examined. Photomicrographs of specimen taken from transverse sections of steel slabs, shows that macrosegregation is strongly affected by pouring temperature (P T). For solute of carbon, phosphorus and sulfur, has been shown that the pouring temperature (P T) has a significant role on the resulting macrosegregation profiles, while that the elements as such silicon, manganese and aluminum, the said thermal parameter seems not able to affect its macrosegregation profiles. This is due to the fact that the solutes with lower partition coefficients favors segregation during the continuous casting process. It is shown for considered steels, the pouring temperature (P T) influences the position of the columnar to equiaxed transition (CET). Experimental results show that the end of the columnar region is abbreviated when lower pouring temperatures is used in continuous casting process. One can observe that as the pouring temperature (P T) increase in continuous casting process, the secondary dendritic arm spacing (λ 2) increase, i.e., the dendritic morphology became coarsen.

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“…According to the deformation of a copper plate mould and beam blank, Shen Quan proposed the concept of tapered optimization for each side [9]. A 3D flow field model for a beam blank mould was built by our team to optimize flow behaviour and accelerate inclusion removal [10], and a thermal-mechanical model was proposed to optimize the second cooling system [11,12]. Although these efforts have resulted in many benefits to beam blank production, such studies are usually based on only a single process or defect, rather than the entire continuous casting production process.…”

Section: Introductionmentioning

confidence: 99%

Reducing Surface Cracks and Improving Cleanliness of H-Beam Blanks in Continuous Casting — Improving continuous casting of H-beam blanks

Chen

Yang

Zhu

et al. 2019

High Temperature Materials and Processes

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A beam blank is ideal for H-beam production, but there are more defects in/on beam blanks than other common blanks. The study of the H-beam blank quality assurance system has great significance for production to determine the key factors causing defects and optimise the casting process parameters. Experimental analysis and numerical simulation, based on an actual production process, were used as research methods. The former was used to test and analyse the cracks, inclusions, and the flux in the mould to determine the preliminary factors causing defects in a beam blank. The latter was used to simulate the flow and temperature fields and the movement of inclusions to determine the key factor leading to defects and to optimize the casting process parameters. Online implementation of the recommendations of this project was developed, which proved that it is very useful and efficient to control surface cracks on the web and enhance cleanliness of an H-beam blank.

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Thermo-mechanical simulation and parameters optimization for beam blank continuous casting

Cited by 26 publications

References 4 publications

Mold taper optimization for continuous casting of H-beam blanks

Mold taper optimization for continuous casting of H-beam blanks

An Experimental Investigation of Continuous Casting Process: Effect of Pouring Temperatures on the Macrosegregation and Macrostructure in Steel Slab

Reducing Surface Cracks and Improving Cleanliness of H-Beam Blanks in Continuous Casting — Improving continuous casting of H-beam blanks

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