(重慶大學(xué) 材料科學(xué)與工程學(xué)院，重慶 400044)
摘 要: 研究了AA1235鋁箔坯料中溫溫度范圍內(nèi)相形成和轉(zhuǎn)變的規(guī)律。 結(jié)果表明， AA1235鋁箔坯料在中溫溫度范圍內(nèi)存在兩個相變反應(yīng)： 一個是從鋁基體中析出α(AlFeSi)相的脫溶相變， 另一個是β′(AlFeSi)→α(AlFeSi)的相變； α(AlFeSi)相的尺寸非常細小，在nm數(shù)量級； 中間退火過程中Fe、 Si元素在鋁基體中的固溶度存在一極小值點， 即最佳固溶貧化點， 該現(xiàn)象的存在是上述兩個對固溶度的變化起相反作用的相變過程共同作用的結(jié)果。
關(guān)鍵字: 鋁箔； 相變； 組織； 中間退火
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
