CAJ | 학술논문

利用商业模拟软件Flow-3D对A357铝合金半固态流变压铸过程进行了研究.对不同压射压力和不同压射速度下的半固态流变充型流动状态及气孔分布进行了模拟,并对其凝固过程进行了模拟,最后通过试验对其进行验证.模拟及试验结果显示,随着压射压力与压射速度的增大,半固态熔体流动状态从层流向紊流过渡;同时压射压力和压射速度的增大对气孔分布也有一定的影响.模拟结果与试验结果基本保持一致,表明利用Flow-3D对压铸工艺进行参数优化是可行的,实现了压铸件性能提高的目的.
이용상업모의연건Flow-3D대A357려합금반고태류변압주과정진행료연구.대불동압사압력화불동압사속도하적반고태류변충형류동상태급기공분포진행료모의,병대기응고과정진행료모의,최후통과시험대기진행험증.모의급시험결과현시,수착압사압력여압사속도적증대,반고태용체류동상태종층류향문류과도;동시압사압력화압사속도적증대대기공분포야유일정적영향.모의결과여시험결과기본보지일치,표명이용Flow-3D대압주공예진행삼수우화시가행적,실현료압주건성능제고적목적.
Filling of rheo-diecasting A357 aluminum alloy and distribution of gas hole in the alloy were simulated by the Flow-3D software at different injection pressure and different injection speed, and solidification process was visualized too. The experiment was conducted to validate the simulated results. The results reveal that flow morphology of semi-solid A357 aluminum alloy melt is transformed from laminar structure into turbulence structure with increasing in injection pressure and injection velocity, meanwhile, distribution of gas hole in the solidification process is also affected. The simulated results are well in agreement with experimental ones, showing that the Flow-3D software can optimize processing parameters of rheo-diecasting A357 aluminum alloy and improve the properties of the die castings.