凝固过程中自然对流作用下组织演化模拟

李强; 莫春立; 李殿中; 钱百年

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凝固过程中自然对流作用下组织演化模拟
Simulation for the Effects of Natural Convection on Microstructural Evolution du ring Solidification Process
2003年第4期页码：18-21
纸质出版日期： 2003 ，
DOI：

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[1]李强,,,,,,,,,,莫春立,,,,,,,,,,李殿中,,,,,,,,,,钱百年.凝固过程中自然对流作用下组织演化模拟[J].特种铸造及有色合金,2003(04):18-21+68.

Li Qiang Mo Chunli Li Dianzhon g Qian Bainian. Simulation for the Effects of Natural Convection on Microstructural Evolution du ring Solidification Process[J]. Special Casting & Nonferrous Alloys, 2003,(4):18-21.
[1]李强,,,,,,,,,,莫春立,,,,,,,,,,李殿中,,,,,,,,,,钱百年.凝固过程中自然对流作用下组织演化模拟[J].特种铸造及有色合金,2003(04):18-21+68. DOI：

Li Qiang Mo Chunli Li Dianzhon g Qian Bainian. Simulation for the Effects of Natural Convection on Microstructural Evolution du ring Solidification Process[J]. Special Casting & Nonferrous Alloys, 2003,(4):18-21. DOI：

摘要

以Fe C二元合金铸锭为例

模拟了其冷却过程中自然对流对凝固组织形成的影响。首先采用有限差分方法计算宏观温度场、速度场和溶质场。然后将计算得到的温度场和溶质场作为已知值耦合元胞自动机方法（CA）对铸锭的组织演化进行模拟。通过模拟发现

在冷却过程中自然对流改变了铸锭内的温度场、速度场和溶质场的分布

进而影响到凝固组织的形貌。

Abstract

The effects of natural convection on the microstructure in Fe C binary alloy ingot during solidification process were simulated. First ly

finite differential method was used to calculate macro temperature field an d velocity field as well as solute transfer. Microstructural evolution of the in got was simulated by above calculated known value coupled cellular automation（CA）. The simulation results showed that natural convection can change the distribution of te mperature

solute and velocity field in the ingot during cooling and solidificat ion process so as to affect the evolution of solidified microstructure.