电磁搅拌制备ZL112Y铝合金流变半固态浆料的实验及模拟研究

Experiment and Simulation of Preparing Semi-solid Slurry of ZL 112Y Aluminum Alloy by Electromagnetic Stirring

对不同温度及不同搅拌工艺下得到的材料的显微组织的比较,确定了合理的半固态温度和搅拌工艺,即半固态温度为590oC,震荡电流为500A。随后对单个线圈电磁搅拌过程进行建模及电磁场和流速场的耦合模拟得到了电磁场和流速场分布,此结果与电磁搅拌的原理及实验结果相一致。计算出在该温度和工艺下熔体内部的平均流动速度为3.2cm/s,将该结果作为能否得到半固态浆料的判据。

A reasonable semi -solid temperature, 590℃, and electromagnetic stirring process, the concussive current 500A, were comfirmed through the comparison of the microstructures of the alloy at different temperature and stirring process. The distribution of electromagnetic coupling with single coil. The result was in 3. 2 cm/s in the melt was calculated at slurry can be gained or not field and fluid field can be obtained by modeling and simulating the conformity with the principle and test results, An average velocity of this condition, which was considered as a criterion whether semi -solid slurry can be gained or not.