(重庆大学 材料科学与工程学院，重庆 400044)
摘 要: 研究了AA1235铝箔坯料中温温度范围内相形成和转变的规律。 结果表明， AA1235铝箔坯料在中温温度范围内存在两个相变反应： 一个是从铝基体中析出α(AlFeSi)相的脱溶相变， 另一个是β′(AlFeSi)→α(AlFeSi)的相变； α(AlFeSi)相的尺寸非常细小，在nm数量级； 中间退火过程中Fe、 Si元素在铝基体中的固溶度存在一极小值点， 即最佳固溶贫化点， 该现象的存在是上述两个对固溶度的变化起相反作用的相变过程共同作用的结果。
关键字: 铝箔； 相变； 组织； 中间退火
AA1235 aluminium sheets for foils
（College of Materials Science and Engineering,
Chongqing University, Chongqing 400044, China）
Abstract: The formation and transformation of intermetallic compounds in AA1235 aluminium sheets for foils in medium temperature range in which recrystallization occurs was systematically studied. The results show that there are two types of phase transformations in the medium temperature range: one is the precipitation of α(AlFeSi) from the matrix, the other is the phase transformation of β′(AlFeSi) to α(AlFeSi). The transformation products α(AlFeSi) are nano-sized particles. An experimental phenomena, 'minimum solution point during intermediate annealing process, is also found and deemed to be the combined results of the two above mentioned phase transformations having inverse contribution to the solid solution of Si and Fe in Al matrix.
Key words: aluminium foils; phase transformation; microstructure; intermediate annealing
