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中文摘要：
研究了Mn含量对含0.15%Fe的6061铝合金的均匀化组织、再结晶分数、时效析出相和力学性能的影响。结果表明：未添加Mn的合金均匀化后组织以β-Al9Fe2Si2相为主,Mn含量大于0.1%的合金均匀化后的组织以α-Al8（FeMnCr）2Si相为主;同时一种块状的Al9（MnFe）3Si结晶相随着Mn含量的增加开始出现,并随之增多;时效处理时,Mn优先与Mg,Si元素结合形成的AlMnSi和AlFeMnSi相,减少了主要时效析出相,使强化效果减弱;Mn的添加量为0.2%时σb=390 MPa,σ0.2=330 MPa,δ=22.2%,比AA6061铝合金的标准力学性能分别提高90 MPa,55 MPa,延伸率提高10%。
英文摘要：
The effects of Mn content on the homogenized microstructure, recrystallized fraction, pre cipitates and mechanical properties of 6061 aluminum alloy containing 0.15% Fe （mass fraction） was in vestigated. The results show that： after homogenization the main phases of the 0 Mn alloy isβ-AI9Fe2Si2, and that of 0.1% Mn alloy is α-AIs（FeMnCr）2Si, meanwhile the blocky-shaped AI9 （MnFe） 3Si phase begins to appear and increases with increase of the Mn content; during aging treatment, Mn and Mg, Si form the AIMnSi and AIFeMnSi phases preferentially, which makes the main hardening precipitates reduce and weakens the strengthening effect. 0.2% Mn alloy is advisable, δb = 390 MPa, δ0.2 = 330 MPa, δ = 22.2%, which is increased by 90 MPa, 55 MPa and 10% respectively, comparing with AA6061 aluminum alloys＇ standard mechanical properties.
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