CAJ | 학술논문

通过有限差分法, 利用Visual C++6. 0建立AZ31镁合金电磁连续铸造过程的数学模型, 该模型可预测铸锭及底模的温度分布.利用温升法测量了电磁连铸过程铸锭内部的感应热量值和分布,得到了沿结晶器水平方向、垂直方向不同条件下的感应热分布,并计算获得了该试验条件下的感应加热功率,在数值模拟时有效地合并到了温度场的数值计算模型中.确定一冷区、二冷区以及铸锭与底模之间的边界条件.通过将计算结果与实测温度的比较, 证明该模型可以用来模拟实际铸造过程.研究了不同铸造条件对铸锭温度场分布的影响, 为优化镁合金电磁连铸的工艺参数提供了依据.
통과유한차분법, 이용Visual C++6. 0건립AZ31미합금전자련속주조과정적수학모형, 해모형가예측주정급저모적온도분포.이용온승법측량료전자련주과정주정내부적감응열량치화분포,득도료연결정기수평방향、수직방향불동조건하적감응열분포,병계산획득료해시험조건하적감응가열공솔,재수치모의시유효지합병도료온도장적수치계산모형중.학정일랭구、이랭구이급주정여저모지간적변계조건.통과장계산결과여실측온도적비교, 증명해모형가이용래모의실제주조과정.연구료불동주조조건대주정온도장분포적영향, 위우화미합금전자련주적공예삼수제공료의거.
A mathematical model on the electromagnetic continuous casting magnesium alloy billets was established to predict the temperature distribution in the billet and dummy block using VC　+　+　6.0 and finite differential method(FDM). Induction heating distributions at horizontal and vertical directions along mould at varied conditions were presented by measuring induction heating and its distribution in electromagnetic continuous casting billets based on temperature-increment method, and induction heating power was calculated, which was considered into the mathematical model for calculating temperature field. Boundary conditions of primary、secondary cooling zone and interfacial cooling between billet and dummy block were determined. The simulated results are well in agreement with the experimental ones, showing the availability of the model. Effects of different parameters on distribution of temperature field in billets were investigated to optimize the processing parameters.