( 1. 東北大學(xué) 材料與冶金學(xué)院， 沈陽 110004;
2. 山東輕工業(yè)學(xué)院 機電工程學(xué)院， 濟南 250100)
摘 要: 通過掃描電鏡/能譜、 X射線衍射以及金相分析， 針對含0.3%Fe(質(zhì)量分?jǐn)?shù))的Al-Mg-Si-Cu鋁合金， 研究了Mn含量對其結(jié)晶相的影響。 研究表明： 合金在鑄造過程中形成的結(jié)晶相為Al1.9CuMg4.1Si3.3， Al5(FeMn)Si， Al8(FeMn)2Si以及少量的Mg2Si； 增大含Mn量， 合金中AlFeMnSi型結(jié)晶相數(shù)量增多； 對合金進行均勻化處理時， Al1.9CuMg4.1Si3.3相完全溶解， 發(fā)生Al5(FeMn)Si向Al8(FeMn)2Si相的轉(zhuǎn)變； 對合金進行軋制及最終熱處理后， 結(jié)晶相碎化且沿軋向呈纖維狀分布， 但結(jié)晶相的類型不變。
關(guān)鍵字: Al-Mg-Si-Cu鋁合金; 結(jié)晶相; Al1.9CuMg4.1Si3.3; Al5FeSi; Al8Fe2Si
LIU Chun-ming1, ZUO Liang1
（ 1. School of Materials and Metallurgy,
Northeastern University, Shenyang 110004, China;
2. School of Mechanical and Electrical Engineering,
Shandong Institute of Light Industry, Ji'nan 250100, China）
Abstract: By means of scanning electron microscope/energy spectrum, X-ray diffraction and metallographic analysis, the effect of Mn content on the constituents of Al-Mg-Si-Cu aluminium alloys containing 0.3%Fe (mass fraction) was studied. The results indicate that the constituents formed during cast of alloys are Al1.9CuMg4.1Si3.3, Al5(FeMn)Si, Al8(FeMn)2Si and a little Mg2Si. With increment of Mn content, the number of the constituents of Al(FeMn)Si is increased. During homogenizing treatment， the Al1.9CuMg4.1Si3.3 phase dissolves completely, and the phase transformation of Al5(FeMn)Si to Al8(FeMn)2Si occurs. But the morphology and distribution have not variation. After rolling and final heat treatment, the constituents are crushed and distribute in continuous lines along rolling direction. However, types of the constituents vary no longer.
Key words: Al-Mg-Si-Cu aluminium alloys; constituents; Al1.9CuMg4.1Si3.3; Al5FeSi; Al8Fe2Si
