Formation and Control of Central Cracks in Alloy Steel ZKG223

Zhang, Mengyun; Bao, Yanping; Zhao, Lihua; Zheng, Hewu

doi:10.1002/srin.202200289

Cited by 3 publications

(1 citation statement)

References 30 publications

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“…A 3D thermal-mechanical coupled model was developed by the commercial finite element software MSC Marc 2018 to simulate the heat transfer and deformation behavior of billets during the reduction process. The heat transfer equation and constitutive equation used for this 3D thermal-mechanical coupled model were introduced in authors' previous work [25] and relevant literature [26]. The thermal material properties of the studied steel grade such as thermal conductivity, solidification latent heat, and specific heat capacity were obtained by the JMatPro software (JmatPro 12.0), while the relevant mechanical parameters, such as Young's modulus and Poisson's ratio are adopted from relevant references [27,28].…”

Section: Description Of Thermal-mechancial Coupling Simulationmentioning

confidence: 99%

On the Macrosegregation of Continuous Casting of High Carbon Steel Billet with Strand Reduction Process

Gao,

Bao,

Wang

et al. 2024

Metals

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A mathematical model of the macrosegregation of continuous cast high carbon steel billet was developed based upon a representative volume element, considering the flow of enriched liquid, solidification rate, and solidification shrinkage as well. It was found that a lower casting velocity, higher cooling intensity, and shorter solidification interval positively contributed to the inhibition of macrosegregation in a continuously cast billet when a mechanical reduction process was not applied. A numerical expression for the relative flow velocity of liquid was further proposed incorporating such aspects as casting velocity, densities of different phases, and the variation of cross section areas as well. The analysis based on this numerical expression indicated that the overall effect of the reduction process on the macrosegregation of billets depended not only on the reduction zone but also on the reduction amount and its distribution for the active reduction rolls. The test results of further practical plant trials demonstrated a reasonable agreement with the predictions obtained from the proposed numerical model, indicating the reliability of this analysis model to be employed for the continuous casting of high carbon steel billet with strand reduction process.

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Section: Description Of Thermal-mechancial Coupling Simulationmentioning

confidence: 99%

On the Macrosegregation of Continuous Casting of High Carbon Steel Billet with Strand Reduction Process

Gao,

Bao,

Wang

et al. 2024

Metals

Self Cite

View full text Add to dashboard Cite

show abstract

Investigation on the effect of reduction process on internal quality of high carbon steel billet and its evolution in as-rolled wire rod

Gao,

Bao,

Wang

et al. 2024

Metall. Res. Technol.

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The effect of reduction process, especially the reduction zone on the internal quality of continuous casting high carbon steel billets was studied by shifting active reduction rolls while at same casting condition, as well as identical reduction amount and gradient. In the present study, the heredity of the main internal defects emerged in billets with different reduction zones was also investigated after subsequent rolling process in terms of severity, regional distribution, and microstructure formation as well. For the investigated high carbon steel grade, the evolution of the internal quality in relation to the macrosegregation, internal crack and porosity illustrates the effectiveness and importance of applying mechanical reduction for the homogeneity improvement from the cast billet to the as-rolled wire rod product. Meanwhile, it is also suggested by the investigation the necessity of fine control for the implement of mechanical reduction process, or it may not have sufficient positive impact on homogeneity and compactness of billet and as-rolled product, but some other undesirable defects may even be induced by mechanical reduction.

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Study on the synergistic effect of electromagnetic stirring and mechanical reduction on the improvement of the internal homogeneity of high-carbon steel billet

Gao,

Bao,

Wang

et al. 2024

Ironmaking & Steelmaking: Processes, Products and Applicati

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The synergistic effect of electromagnetic stirring (EMS) and mechanical reduction on the improvement of the internal homogeneity has been studied during the continuous casting of high-carbon steel billet. Plant trials were conducted with different parameters both for mold electromagnetic stirring (M-EMS) and final electromagnetic stirring (F-EMS), at the same casting condition and with a unified mechanical reduction process. As the stirring intensity of EMS increases, both the initiation and termination of columnar to equiaxed transition occur at an earlier timing. The results also indicate that, EMS could result in a decline trend for the compactness of the casting billet to a certain extent, especially in the pure equiaxed crystal zone at the core part of the billet. Under the proper intensity setting of M-EMS and F-EMS, the crack susceptibility of the high-carbon steel billet was markedly decreased by enlarging the mixed crystal zone, which is not arrayed with distinct directionality while featured with a relatively high compactness. The effect of EMS on the solidification behavior, and therefore on the crack susceptibility of the high-carbon steel billet was further explained with the numerical simulation. Consequently, a superior inner quality of high-carbon steel billet was successfully achieved with the effective synergy of EMS and mechanical reduction.

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Formation and Control of Central Cracks in Alloy Steel ZKG223

Cited by 3 publications

References 30 publications

On the Macrosegregation of Continuous Casting of High Carbon Steel Billet with Strand Reduction Process

On the Macrosegregation of Continuous Casting of High Carbon Steel Billet with Strand Reduction Process

Investigation on the effect of reduction process on internal quality of high carbon steel billet and its evolution in as-rolled wire rod

Study on the synergistic effect of electromagnetic stirring and mechanical reduction on the improvement of the internal homogeneity of high-carbon steel billet

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