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讨论了Flemings,M.C.对具有宽结晶温度范围合金充填铸型能力所提出的分析式,认为对细薄铸件而言其假设是可接受的,但对涂料层的作用没有考虑,因而还不能全面说明铸件-铸型界面在充填过程的热交换现象。在上述分析式的基础上本文作者提出一个考虑了铸件、涂料层和铸型三部分换热作用的分析式并对具有宽结晶温度范围的Al-4.5Cu合金进行了验证。作者采用组合式螺旋试样对不同铸型及不同涂料进行了比较,实验结果说明:1)铸型紧实度对其被充填性有显著影响;2)干砂型与湿砂型的被充填性相近,较水玻琍砂型高～40—30%;3)烟黑涂料显著地提高了Al-4.5Cu合金的充填铸型能力;4)具有相当厚度的涂料层对一定铸件而言在充填过程中相当于半无限大铸型。
The formula proposed by Flemings, MC for ability to alloy fill molds with a wide range of crystallisation temperatures is assumed to be acceptable for thin castings, but does not account for the effect of the coating layer and therefore does not provide a full description Casting - casting interface in the filling process of heat exchange phenomenon. Based on the above analysis, the author proposes an analytical formula that considers the heat transfer of the three parts of the casting, the coating layer and the mold and verifies the Al-4.5Cu alloy with a wide range of crystallization temperature. The authors compared the different molds and different coatings by using the combined spiral specimen. The experimental results show that: 1) the compaction degree of the mold has a significant effect on its filling ability; 2) the filling properties of dry sand and wet sand are similar , Which is 40-30% higher than that of water glass; 3) the smoke black coating significantly improves the filling moldability of the Al-4.5Cu alloy; and 4) the coating layer with a considerable thickness is suitable for certain castings during the filling process Equivalent to semi-infinite mold.