Features and shortcomings of five popular formulas for calculating pouring time in al, cu alloy casting product are described. Every formula's shortcoming in its material range is analyzed.

重点阐述了铝、铜合金铸件生产中较常应用的五种浇注时间计算公式的特点和存在的不足，分析了这几种公式在各自的材质铸件使用范围内出现的缺点及不足。

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The modifying experiments on hypereutectic Al - Si alloy were made by addition of sodium flux and P - Cu alloy.

用磷铜合金和四元钠盐变质剂对过共晶铝硅合金进行了变质处理试验。

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Al-Cu alloy is widely used in aeronautical and space aerocraft light armor vehicle and some parts of automobile owing to its excellent high temperature and super-low temperature mechanical properties.

铝铜合金具有良好的高温和超低温性能，而广泛应用于航空航天飞行器、轻型装甲以及汽车的某些零部件等民用领域。

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