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采用铝合金半固态表观粘度模型,耦合流动基本方程,使用有限差分方法及交错网格技术,对铝合金半固态充型过程进行了模拟研究,成功实现了对铝合金半固态流动场的计算分析,并通过条形铸件对模拟结果进行了试验验证。模拟结果表明,相比于普通的铝合金浆料,半固态浆料会沿着型腔壁缓慢向前推进,充型液面前端平滑。模拟结果与相似条件下成形的试验结果充型特征基本吻合。
The semi-solid aluminum alloy semi-solid filling process was simulated by using semi-solid aluminum viscoelastic viscosity model and coupled flow basic equation. The finite difference method and staggered-grid technique were used to simulate the semi-solid flow field of aluminum alloy. The simulation results were analyzed and verified by strip castings. The simulation results show that compared with the common aluminum alloy slurry, the semi-solid slurry advances slowly along the cavity wall, and the front end of the filling liquid is smooth. The results of the simulation are consistent with those of the test results formed under similar conditions.