大型钢锭凝固模拟计算中发热剂的优化处理
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摘要
在大型钢锭的数值模拟计算过程中,发热剂模型不随钢锭收缩而变化,使数值模拟的温度场、缩孔缩松预测产生偏差。针对这一问题,以ProCAST为计算软件,建立可替代发热剂模型的数学模型,即钢锭的体积表面热,并以96 t金属模钢锭的传热凝固过程为研究对象,设置体积表面热参数与发热剂模型进行对比,得到完全凝固时间与实际情况相符的参数数据。
In the process of numerical simulation of large ingots,the exothermic compound model does not change with the shrinkage of ingots,which makes the prediction of temperature field and shrinkage porosity deviate.In order to solve this problem,a mathematical model,that is,the volume surface heat of the ingot,which can replace the exothermic compound model has been established by using ProCAST as the calculation software,and the heat transfer and solidification process of the 96 t metal mold steel ingot has been taken as the research object. The volume surface thermal parameters have been compared with the exothermic compound model,and the parameter data which make the complete solidification time consistent with that in the actual situation have been obtained.
In the process of numerical simulation of large ingots,the exothermic compound model does not change with the shrinkage of ingots,which makes the prediction of temperature field and shrinkage porosity deviate.In order to solve this problem,a mathematical model,that is,the volume surface heat of the ingot,which can replace the exothermic compound model has been established by using ProCAST as the calculation software,and the heat transfer and solidification process of the 96 t metal mold steel ingot has been taken as the research object. The volume surface thermal parameters have been compared with the exothermic compound model,and the parameter data which make the complete solidification time consistent with that in the actual situation have been obtained.
引文
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[2]徐亚东,沈厚发,雷丙旺,等.模拟软件在钢锭模设计中的应用[J].铸造技术,2014,35(9):2056-2058.
[3]赵艳红,高建军,王欢.数值模拟在大钢锭制造中的应用[J].大型铸锻件,2012(2):12-16.
[4]张颖娟,寇宏超,李鹏飞,等.真空自耗电弧熔炼TC4铸锭的凝固组织和疏松缩孔的模拟[J].特种铸造及有色合金,2012,32(5):418-421.
[5]党卫东,吴晓春,闵永安,等.冒口高度对大型锻造钢锭内部质量影响的数值模拟研究[J].铸造技术,2010,31(6):753-758.
[6]董洁,袁守谦,邓林涛,等.锻造用钢锭凝固过程温度场数值模拟[J].铸造技术,2007,28(2):268-270.
[7] Jiaqi Wang,Paixian Fu,Hongwei,et al. Shrinkage porosity criteria and optimized design of a 100-ton 30Cr2Ni4MoV forging ingot[J]. Materials and Design,2012,35:446-456.
[8]徐亚东,沈厚发,雷丙旺,等.帽口高度对钢锭内部品质影响的模拟分析[J].特种铸造及有色合金,2014,34(5):483-485.
[9]徐亚东,沈厚发,韩非.基于凝固模拟的冒口高度设计及验证[J].热加工工艺,2015,44(9):165-172.
[10]艾新港,张书豪,曹震,等.帽部传热条件对钢锭缩松影响的数值模拟[J].特种铸造及有色合金,2015,35(11):1158-1162.
[11]段建平,张永亮,傅排先. 8. 4 t钢锭冒口保温效果优化与改进[J].炼钢,2016,32(5):67-71.
[12]马薇,赵建华,宋刚.冒口保温条件对大型钢锭凝固过程影响的数值模拟[J].热加工工艺,2011,40(21):41-43.
[13]王晓花,厉英.钢锭凝固过程温度场数值模拟[J].铸造,2013,62(5):410-419.
[14]徐亚东,沈厚发,胡永平,等.冒口发热效果对钢锭内部质量的影响[J].热加工工艺,2015,44(1):84-87.
[15]崔雅茹,马占彪,赵俊学,等.冒口参数对17CrNiMo6钢锭质量及利用率的影响[J].铸造,2017,66(7):719-722.
[16] ESI集团. Pro CAST用户手册[M].法国.
[17]王皆腾,陈由旺,陈军.高温空气燃烧系统的能量利用率分析[J].承德石油高等专科学校学报,2004,6(1):12-15.