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作者对高铝铸造锌合金ZA27(Z_n-27Al)和ZA12(Z_n-12Al)的铸造性能进行了系统的研究,并与具有优良铸造性能的铝硅合金,ZL102进行了对比.试验结果表明,ZA12锌铝合金具有和ZL102铝硅合金相似的优良铸造性能,ZA27锌铝合金也具有较好的铸造性能,但它具有较大的热裂、缩孔和缩松倾向,特别是在较厚壁砂型铸件中,易产生下部收缩现象,试验认为,这是由于ZA27合金结晶温度范围、较宽,凝固时富铝相和富铜相产生比重偏析的结果.
The authors systematically studied the casting properties of ZA27 (Z_n-27Al) and ZA12 (Z_n-12Al) cast high-aluminum cast zinc alloys and compared them with that of ZL102, an Al-Si alloy with excellent casting performance.The experimental results show that ZA12 Zinc-aluminum alloy has the same excellent casting performance as ZL102 aluminum-silicon alloy, ZA27 zinc-aluminum alloy also has better casting performance, but it has larger tendency of thermal cracking, shrinkage and shrinkage, especially in the thick wall sand Castings, prone to the lower contraction phenomenon, the experiment that this is due to ZA27 alloy crystallization temperature range, wide, solidification of the aluminum-rich phase and the proportion of heavy copper segregation results.