铸锭凝固过程缩孔缺陷的数值模拟  

Numerical Simulation Research of the Shrinkage Defects in Ingot Casting

作　　者：黄婷[1] 李京社[1] 唐海燕[1] 杨宏博[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《铸造》2013年第7期633-636,640,共5页Foundry

摘　　要：为减少铸锭的缩孔缺陷,采用有限元分析软件ProCAST对某厂5 t铸锭的凝固过程进行模拟,讨论了浇注温度、锭身换热系数以及锭身锥度对缩孔缺陷的影响。结果表明:浇注温度较高时缩孔缺陷严重;锭身换热条件对铸锭缺陷的影响很大,锭身冷却较佳换热系数是200 W/(m2.K);随着锭身锥度的增加,一次缩孔和二次缩孔深度先减小后增加,其适宜锭身锥度为0.09。To reduce the shrinkage defects of ingot casting, the solidification process of a factory＇ s 5 tons ingot casting was simulated by finite element software ProCAST. The effects of pouring temperature and heat transfer coefficient and taper of ingot body were discussed. The results show that shrinkage defects got worse as the pouring temperature is high; heat transfer coefficient of ingot body has a large influence on the defects of the ingot, 200 W/（mz.K） is a better heat transfer coefficient for the ingot cooling. The depth of first shrinkage and secondary pipe both increase at the beginning and then decrease with the increase of taper, the appropriate value is 0.09.

关 键 词：缩孔 凝固过程 数值模拟 

分 类 号：TG244[金属学及工艺—铸造]