进气岐管铸造工艺模拟及工艺研究

铝合金进气歧管在国产化过程中，由于缩孔和气（针）孔问题，其合格率很低。根据工艺要求，建立了进气歧管的实体模型，对其铸造过程的流动和凝固现象进行了数学物理模拟，并利用商业化的MAGMAsoft软件对其浇注和凝固过程进行了流场和温度场的分析，预测了其铸造过程可能发生缩孔和卷气等缺陷的位置。根据模拟分析的结果，从工艺上采取了相应的措施，通过引入排气管和放大冒口，将产品合格率由原来的20％左右提高到了93％左右。

Simulation of Casting Process for Manifold

Shrinkage porosity and gas (pin) hole formed in localization of alloy manifold result in the low qualified product rate. A model for the manifold was established to simulate the flow and solidification during filling process, and commercial MAGMAsoft software was employed to analyze the flow field and temperature field to predict the possible position formed shrinkage porosity and entrapped gas during filling process. Based on above results, the countermeasures were adopted to increase the qualified rate from about 20% to 93%, including introducing exhausting tube and enlarging riser.