帽部传热条件对钢锭缩松影响的数值模拟  

Numerical Simulation of Effects of Riser Heat Transfer Conditions on Shrinkage Porosity in 3.1 t Ingot

作　　者：艾新港[1] 张书豪[1] 曹震[1] 李胜利[1] 王国承[2] 刘海啸[1] 孟凡童[1] 

机构地区：[1]辽宁科技大学冶金工程辽宁省重点实验室 [2]辽宁科技大学化学冶金辽宁省重点实验室

出　　处：《特种铸造及有色合金》2015年第11期1158-1162,共5页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(51374125);辽宁省教育厅项目(L2015251);辽宁省大学生创新创业训练计划项目(201510146007)

摘　　要：绝热板、发热剂等帽部传热条件对钢锭的内部缩松、缩孔有决定性作用。采用Anycasting软件建立了某厂3.1t钢锭凝固过程的数学模型,模拟了绝热板导热系数、发热剂加入时间和发热剂加入量对3.1t钢锭内部缩松、缩孔的影响,并进行了生产试验。结果表明,绝热板导热系数不大于0.17 W·m-2·K-1时,可以很好地抑制3.1t钢锭本体内的缩松缺陷;发热剂应在浇注完成后及时加入,加入量为0.67～1.33kg。The insulating board and heating agent play a decisive role in the quality of ingot.On the basis of Anycasting software,a mathematical model for the solidification field of 3.1tingot was established to predict effects of thermal conductivity of insulation board,heating agent adding time and addition on the shrinkage porosity in 3.1tingot,meanwhile,production verification was carried out.The results show that with thermal conductivity of insulation board less than 0.17 W ·m-2·K-1,appearance of the shrinkage porosity can be inhibited well.The heating agent should be added in time after mold casting or even earlier,and heat agent addition can be controlled in 0.67～1.33 kg.

关 键 词：钢锭 数值模拟 绝热板 发热剂 缩松、缩孔 

分 类 号：TG245[金属学及工艺—铸造]