基于数值模拟的铝合金电机机盖高压铸造

High Pressure Die Casting for Al-alloy Motor Cover Based on Numerical Simulation

基于数值模拟仿真了铝合金电机机盖高压铸造充型过程,分析了浇注温度对铸件充型完成时刻的温度场、卷气含量和表面氧化程度的影响,得出铝合金电机机盖高压铸造最合理的浇注温度为983K。实验结果表明,铸件充型完整,轮廓清晰,表面无冷隔、氧化,初生α-Al相组织最细最均匀,密度、抗拉强度和断后延伸率都达到最大值,实验结果同仿真结果吻合较好。

In this paper,the filling process for aluminum motor cover during high pressure die casting is simulated. The effects of poring temperature on thermal field distribution,volume of gas porosity and oxidation are analyzed by using numerical simulation. It is found that the optimized pouring temperature is 983 K. The experimental results also show that the cast displays a clear outline and the cold shut and oxidation are not detected. The α-Al phases are pretty fine and uniform. The density,yield stress and elongation for the cast can reach its maximum value. The experimental results match well with the simulated results.