Mn含量对6061铝合金组织与力学性能的影响  

Effects of Mn Content on Microstructure and Mechanical Properties of 6061 Aluminum Alloy

作　　者：张新明[1] 柯彬[1] 唐建国[1] 刘胜胆[1] 邓运来[1] 

机构地区：[1]中南大学材料科学与工程学院,长沙410083

出　　处：《材料研究学报》2013年第4期337-341,共5页Chinese Journal of Materials Research

基　　金：国家重大基础研究2012CB619500;广东省教育部产学研结合重大科技专项2010A090200078资助项目~~

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%。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.

关 键 词：金属材料 6061铝合金 微观组织 力学性能 MN 

分 类 号：TG146[一般工业技术—材料科学与工程]