(山東工業(yè)大學(xué)材料科學(xué)與工程學(xué)院，濟(jì)南 250061;
哈爾濱工業(yè)大學(xué)材料科學(xué)與工程學(xué)院， 哈爾濱 150001)
摘 要: 采用熔體離心試驗、 DTA熱分析和快速凝固方法對Zn-Al合金熔體結(jié)構(gòu)特征進(jìn)行了試驗研究 ， 考察了Cu和Fe元素及溫度對熔體結(jié)構(gòu)特征的影響。 結(jié)果表明，ZA27和ZA42合金液在81 0～885 ℃區(qū)域產(chǎn)生熱效應(yīng)變化，低溫時呈現(xiàn)較明顯的微觀不均勻性， 高溫過熱使 熔體結(jié)構(gòu)趨向均勻。熔體高溫過熱及快速凝固冷卻使ZA42合金中α-Al 固溶體的晶體常數(shù)值增加。
關(guān)鍵字: Zn-Al合金 熔體結(jié)構(gòu) 微觀不均勻性
（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
