Acta Metallurgica Sinica (English Letters) ›› 2011, Vol. 24 ›› Issue (1): 54-64.DOI: 10.11890/1006-7191-111-54

• 研究论文 • 上一篇    下一篇

Numerical study of macrosegregation formation in ingot cast in normal sand mold and water-cooled sand mold

刘东戎1,康秀红2,桑宝光3,李殿中4   

  1. 1. 沈阳中科院金属所;哈尔滨理工大学;
    2. 中国科学院金属研究所
    3. 中科院金属研究所
    4. 中国科学院金属研究所材料加工模拟研究部
  • 收稿日期:2010-06-03 修回日期:2010-08-15 出版日期:2011-02-25 发布日期:2011-02-25
  • 通讯作者: 刘东戎

Numerical study of macrosegregation formation of ingot cast in normal sand mold and water-cooled sand mold

Dongrong LIU1,2, Xiuhong KANG1, Baoguang SANG1, Dianzhong LI1   

  1. 1. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
    2. School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China
  • Received:2010-06-03 Revised:2010-08-15 Online:2011-02-25 Published:2011-02-25
  • Contact: Xiuhong KANG

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摘要： Formation of macrosegregation in 5t steel ingots cast in sand molds with and without water-cooled copper tube is simulated by solving macroscopic mass, momentum, species and energy conservation equations, with the consideration of shrinkage formation. Predicted macrosegregation pattern in the ingots shows a fair agreement with the experimental data. Both calculations and experiments reveal that some positive segregation patches are formed at the bottom of ingot. The ingot cast with water-cooled copper tube has a less intensive macrosegregation. Mechanisms of macrosegregation formation are numerically analyzed. Explanations regarding the influences of fluid flow and temperature change upon the segregation formation are provided.

Abstract: Formation of macrosegregation of 5 t steel ingots cast in sand molds with and without water-cooled copper tube is simulated by solving macroscopic mass, momentum, species and energy conservation equations with the consideration of shrinkage formation. Predicted macrosegregation pattern of the ingots shows a fair agreement with the experimental data. Both calculations and experiments reveal that some positive segregation patches are formed at the bottom of ingot. With the water-cooled copper tube inserted in the sand mold, the ingot cast has a less intensive macrosegregation. Mechanisms of macrosegregation formation are numerically analyzed. Explanations regarding the influences of fluid flow and temperature change upon the segregation formation are provided.

Key words: Macrosegregation, Water-cooled mold, Fe-C alloy, Numerical simulation