(1 哈爾濱工業(yè)大學(xué)材料科學(xué)與工程學(xué)院，哈爾濱 150001；
2 韓國機(jī)械材料研究院，昌原 641-010，韓國)
摘 要: 采用光學(xué)顯微鏡，掃描電子顯微鏡，透射電子顯微鏡，電子探針X射線微區(qū)分析儀和定量圖像分析儀研究了3 004鋁合金鑄態(tài)和均勻化退火態(tài)的顯微組織以及均勻化退火溫度和時(shí)間對顯微組織的影響。在鑄態(tài)組織中發(fā)現(xiàn)了一種新的富MgSiCu的共晶體。在均勻化退火過程中發(fā)生β→α相變和α彌散相的脫溶析出。在試驗(yàn)條件下，最佳均勻化退火工藝為615℃，20 h。經(jīng)此工藝處理可獲得較均勻的顯微組織。
關(guān)鍵字: Al-Mn-Mg合金；均勻化退火；顯微組織
（1. College of Materials Science and Engineering，Harbin Institute of Technology，Harbin 150001，P. R. China
2. Korea Institute of Machinery and Materials，Changwon 641-010，Korea）
Abstract: The microstructure of 3004 alloy in as-cast and homogenized states and the effect of heating temperature and soaking time on the microstructure were studied by OM, SEM, TEM, EPMA and quantitative image analyzer. A new MgSiCu-rich eutectic in the as-cast ingot has been found. During homogenization the transformation of β→α and the precipitation of α dispersoids took place. The best homogenization process is 615 ℃，20 h by which the more uniform microstructure can be obtained.
Key words: Al-Mn-Mg alloys; homogenizing annealing; microstructure
