冒口保温条件对大型钢锭凝固过程影响的数值模拟  

Numerical Simulation on Influence of Riser Heat Preservation Conditions on Solidification Process of Steel Ingot

作　　者：马薇[1] 赵建华[1,2] 宋刚[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400045 [2]国家镁合金材料工程技术研究中心,重庆400045

出　　处：《热加工工艺》2011年第21期41-43,共3页Hot Working Technology

基　　金：国家科技重大专项(G09003.2-1);重庆市科技攻关项目(CSTC2009AA3012-3)

摘　　要：为了优化大型钢锭的浇注工艺,以铸造数值模拟软件为模拟平台,通过建立基于0,50,100,200,300和500mm不同的发热剂厚度的数学模型来研究冒口保温条件对175t大型钢锭凝固过程的影响。模拟结果表明:随着发热剂厚度的增加,钢锭最后凝固区域更易向冒口补缩,缩孔"V"形开口逐渐增大;发热剂加至一定厚度时,钢锭内部缩孔不再发生明显变化;300 mm是最佳的发热剂厚度。Based on the casting simulation software, the solidification process of steel ingot under different riser heat preservation condition was simulated respectively with 0, 50, 100, 200, 300, 500 mm heating agent thickness in order to optimize the casting process of steel ingot. The simulated results show that, with the increase of heating agent thickness, the final solidified area is apt to move to the riser and ＂V＂-shaped opening increases gradually; when the heating agent thickness achieves to some value, the shrinkage cavity in the ingot is no longer change; 300 mm heating agent thickness is the best value.

关 键 词：大型钢锭 发热剂厚度 凝固 数值模拟 

分 类 号：TG224.4[金属学及工艺—铸造]