(山东工业大学材料科学与工程学院，济南 250061;
哈尔滨工业大学材料科学与工程学院， 哈尔滨 150001)
摘 要: 采用熔体离心试验、 DTA热分析和快速凝固方法对Zn-Al合金熔体结构特征进行了试验研究 ， 考察了Cu和Fe元素及温度对熔体结构特征的影响。 结果表明，ZA27和ZA42合金液在81 0～885 ℃区域产生热效应变化，低温时呈现较明显的微观不均匀性， 高温过热使 熔体结构趋向均匀。熔体高温过热及快速凝固冷却使ZA42合金中α-Al 固溶体的晶体常数值增加。
关键字: Zn-Al合金 熔体结构 微观不均匀性
（School of Materials Science and Engineering, Shandong University of Technology, Ji'nan 250061, P. R. China
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China）
Abstract:Structure features of molten Zn-Al based alloys were studied by melt centrifugal test, DTA and rapid solidification methods. The effects of Cu and Fe elements and superheating temperature on the structure feature were examined. The results showed that at lower temperatures ZA27 and ZA42 alloy melts presented micro-heterogeneity, with some heat effects at 810～855 ℃. High temperature superheating made the alloy melts tend to be homogeous, and its combination with the rapid solidification could increase the lattice constant of α-Al solid solution in the ZA42 alloy.
Key words: Zn-Al based alloy melt structure micro-heterogeneity
