Modeling and Simulation of Void Closure during Steckel Mill Rolling for Steel Plate,Steel Research International

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Modeling and Simulation of Void Closure during Steckel Mill Rolling for Steel Plate
Steel Research International ( IF 1.9 ) Pub Date : 2020-09-29 , DOI: 10.1002/srin.202000293
Shouvik Ganguly ₁ , X. Wang ₁ , K. Chandrashekhara ₁ , M. F. Buchely ₂ , S. Lekakh ₂ , R. J. O'Malley ₂ , D. Bai ₃ , Y. Wang ₃

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Internal void defects as shrinkage porosity, gas bubble, and thermo‐mechanical cracks are usually formed during steel casting processes. These defects have critical impact on the quality and service life of hot‐rolled products. Study of the possibility of self‐healing of existing internal defects during hot‐rolling process has been of interest to industry and researchers. Prediction of void closure is extremely useful in relation to better product design and manufacturing process optimization. Herein, a 3D finite element model of the slab hot‐rolling process is developed to simulate and analyze the healing of internal voids in hot‐rolled steel plate. The material model for the steel plate is developed based on Johnson–Cook constitutive relation to accurately represent its viscoplastic behavior at high temperatures as well as account for strain rate sensitivity. The study evaluates the thermal and mechanical response of low‐carbon steel slabs having pre‐existing voids during multi‐pass strands reverse hot‐rolling process. Through thickness plastic strains within the slab are found to influence void closure. Results show that variation in void size and locations also affect the healing possibilities. Finally, the effect of thermal history and thermo‐mechanical stresses on void closure is studied.

中文翻译：

钢板卷板轧制过程中空隙闭合的建模与仿真

在铸钢过程中通常会形成内部空隙缺陷，如收缩孔隙，气泡和热机械裂纹。这些缺陷对热轧产品的质量和使用寿命具有至关重要的影响。对热轧过程中现有内部缺陷进行自我修复的可能性的研究已经引起了行业和研究人员的兴趣。空隙闭合的预测对于更好的产品设计和制造工艺优化非常有用。在此，开发了板坯热轧过程的3D有限元模型，以模拟和分析热轧钢板内部空隙的修复。钢板的材料模型是基于Johnson-Cook本构关系开发的，可以准确地表示其在高温下的粘塑性行为，并考虑了应变速率敏感性。这项研究评估了多道坯反向热轧过程中具有空隙的低碳钢坯的热和机械响应。在整个厚度范围内，发现板坯中的塑性应变会影响空隙的闭合。结果表明，空隙大小和位置的变化也会影响治愈的可能性。最后，研究了热历史和热机械应力对空隙封闭的影响。在整个厚度范围内，发现板坯中的塑性应变会影响空隙的闭合。结果表明，空隙大小和位置的变化也会影响治愈的可能性。最后，研究了热历史和热机械应力对空隙封闭的影响。在整个厚度范围内，发现板坯中的塑性应变会影响空隙的闭合。结果表明，空隙大小和位置的变化也会影响治愈的可能性。最后，研究了热历史和热机械应力对空隙封闭的影响。

更新日期：2020-09-29

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