(北京有色金屬研究總院，北京 100088)
摘 要: 采用金相(OM)、掃描電鏡(SEM)、能譜(EDS)和透射電鏡(TEM)，研究6061鋁合金中富鐵相在均勻化過(guò)程中的轉(zhuǎn)變和析出行為。結(jié)果表明：Mn元素直接參與6061鋁合金中富鐵相的相變過(guò)程，使富鐵相由板條狀的β-AlFeSi相轉(zhuǎn)變成顆粒狀的α-Al(FeMn)Si相，在560 ℃未發(fā)現(xiàn)明顯的β-Al5FeSi→α-Al8Fe2Si的相變過(guò)程；在均勻化過(guò)程中，析出塊狀A(yù)l8Fe2Si 相和顆粒狀A(yù)l167.8Fe44.9Si23.9相，其中，Al167.8Fe44.9Si23.9相的析出速度受β-Al5FeSi→α-Al8Fe2Si的相變過(guò)程影響。
關(guān)鍵字: 6061鋁合金；富鐵相；相變；均勻化
6061 aluminum alloy during homogenization
（Central Research Institute for Nonferrous Metals, Beijing 100088, China）
Abstract:The phase transformation and precipitation behavior of iron-rich phase of 6061 aluminum alloy during the homogenization were investigated by optical microscopy(OM)，scanning electron microscopy(SEM), energy dispersive spectrum(EDS) and transmission electron microscopy (TEM). The results show that the element of Mn is directly involved in the phase transformation of iron-rich phase during the homogenization, which makes the needle shaped β-AlFeSi phase transform into particle shaped α-Al(MnFe)Si phase. There is not evident phase transformation of β-Al5FeSi phase → α-Al8Fe2Si phase at 560 ℃. Block shaped phase Al8Fe2Si and granular shaped phase Al167.8Fe44.9Si23.9 precipitate during the homogenization, and the precipitate rate of Al167.8Fe44.9Si23.9 phase is affected by the transition process of β-Al5FeSi phase → α-Al8Fe2Si phase.
Key words: 6061 aluminum alloy; iron-rich phase; phase transformation; homogenization
