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首页> 外文期刊>Journal of Materials Science >Prediction of macrosegregation during the solidification involving a peritectic transformation for multicomponent steels
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Prediction of macrosegregation during the solidification involving a peritectic transformation for multicomponent steels

机译：多组分钢凝固过程中的宏观偏析的预测，包括包晶转变

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Micro-macro segregation models are based on the multi-scale approach of the segregation, i.e., on the coupling of a macrosegregation model, which describes transport phenomena at the ingot scale, with a microsegregation model, which describes solidification at the scale of the primary or secondary dendrite arm spacing. The goal of this work is to illustrate the influence of the microsegregation phenomena on the macrosegregation. A microsegregation model for multicomponent steel alloys has been developed which takes into account solutal diffusion in solid and liquid phases, a correct description of the multicomponent phase diagram, and the variation of the local average solute concentration (open system). The peritectic transformation has been tackled and specific attention has been drawn on the accurate determination of the delta/gamma and gamma/liquid interface movements during solidification. Examples of micro-macro calculations obtained with this microsegregation model on ingot cases are presented and original results which illustrate specific effects of the peritectic transformation on macrosegregation are discussed. (C) 2004 Kluwer Academic Publishers.
机译：微观宏观偏析模型基于偏析的多尺度方法，即基于宏观偏析模型和微观偏析模型的耦合，宏观偏析模型描述了铸锭尺度上的传输现象，微观偏析模型描述了原坯的凝固或次生枝晶臂间距。这项工作的目的是说明微观偏析现象对宏观偏析的影响。已开发出一种用于多组分钢合金的微偏析模型，该模型考虑了固相和液相中的溶质扩散，对多组分相图的正确描述以及局部平均溶质浓度的变化（开放系统）。已经解决了包晶​​转变，并特别注意了凝固过程中δ/γ和γ/液体界面运动的精确确定。给出了用这种微偏析模型对铸锭进行微宏观计算的例子，并讨论了说明包晶转变对宏观偏析的特定影响的原始结果。 （C）2004 Kluwer学术出版社。

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