摘要
以多道浇铸为特征的浇铸床生产高碳锰铁为对象,使用大型凝固有限元计算软件Procast对八道次浇铸条件下各层铁合金的凝固行为进行了模拟研究。结果表明:各层铁合金的凝固均先从与铸型接触界面开始向中间进行,底面凝固较与空气接触的表面快;各浇次铁合金凝固行为有显著差别,计算得出第一层、第四层和第八层铁合金各自总凝固达到7%的时间分别为689 s,680 s,368 s,完全凝固时间分别为3 899 s,2 789 s,1 796 s;新浇铸铁合金凝固过程中会影响到已浇铸铁合金层温度,铁合金层间距离越远,热量传递要经过的铁合金层数越多,传递时间越长,影响越小;第一层铁合金中心点温度在八道浇铸中随时间的变化,第二炉和第三炉有显著影响,第四炉、第五炉和第六炉有一定影响,第七炉和第八炉影响很小。
In order to study the solidification feature of high carbon ferromanganese produced by 8-process casting,the solidification behavior of each ferroalloy layer was simulated by FEM soft Procast in this paper. The calculation shown the solidification process was similar for each ferroalloy layer, in which the solidification started from the mold-cast interface to the central of cast and from the bottom to top. However, the solidification time（ts） for same solidification volume（fs） was influenced by the number ferroalloy layer. When the fs attained 7%, the ts for the first,the fourth, and the eighth ferroalloy layer was 689 s, 680 s, and 368 s respectively, and the complete solidification time of this three casting layer was 3 899 s, 2 789 s, and 1 796 s. The impact on the temperature field of solidified ferroalloy layer because of the new casting process was depended on the distance between the two ferroalloy layers.The analysis for the temperature evolution with total casting time for the center point of first layers shown：（1）largest influence came from the second and third casting;（2）the fourth, the fifth, and the sixth casting could influence the temperature obviously;（3） the variation in the seventh and eighth casting was little.
出处
《铁合金》
2016年第5期18-24,共7页
Ferro-alloys
基金
云南省科技创新强省计划(2015AA018)
关键词
高碳锰铁合金
多道浇铸
有限元
high carbon ferromanganese
multi-process casting
Finite Element Method
