固溶时效处理对AlMg5Si2Mn铝合金组织与性能的影响  

Effect of solution and aging treatment on microstructure and properties of AlMg5Si2Mn aluminum alloy

作　　者：邸抑非 李佳 李勇 赵荣达[1] 相珺[1] 伍复发[1] Di Yifei;Li Jia;Li Yong;Zhao Rongda;Xiang Jun;Wu Fufa(School of Materials Science and Engineering,Liaoning University of Technology,Jinzhou Liaoning 121001,China)

机构地区：[1]辽宁工业大学材料科学与工程学院,辽宁锦州121001

出　　处：《金属热处理》2024年第1期148-153,共6页Heat Treatment of Metals

基　　金：辽宁省自然科学基金博士科研启动基金(2022-BS-310);辽宁省教育厅科学研究经费项目(LJKMZ20220959)。

摘　　要：利用硬度测试、显微组织观察、XRD、拉伸性能测试及断口截面组织观察等表征手段研究了固溶时效处理对AlMg5Si2Mn铝合金组织与性能的影响。结果表明,AlMg5Si2Mn铝合金固溶时效处理后的组织中Mg2Si形貌发生改变,从迷宫状和棒状转变为细小圆球状,分布更为均匀,并且铝合金的硬度显著提高,还随固溶温度的升高而先增加后降低,同时拉伸性能亦有显著提高。经530℃×30 min固溶和190℃×6 h时效后,合金的硬度较高,为49.5 HRB,抗拉强度、屈服强度和断后伸长率分别为260 MPa、173 MPa和17%。Effects of solution and aging treatment on microstructure and properties of the AlMg5Si2Mn aluminum alloy were studied by means of hardness testing,microstructure observation,XRD,tensile testing and cross⁃section fracture observation.The results show that after solution and aging treatment,the morphology of Mg2 Si in the alloy changes from labyrinth and rod to fine spherical shape and distributes more uniform,and thardness of the alloy is significantly improved,which increases first and then decreases as the solution treatment temperature increases,meanwhile,the tensile properties are also significantly improved.After solution treatment at 530℃for 30 min and aging at 190℃for 6 h,the hardness of the AlMg5Si2Mn aluminum alloy is high and up to 49.5 HRB,the tensile strength,yield strength and elongation after fracture is 260 MPa,173 MPa,17%,respectively.

关 键 词：AlMg5Si2Mn铝合金 MG2SI 固溶时效处理 力学性能 

分 类 号：TG156.9[金属学及工艺—热处理] TG146.21[金属学及工艺—金属学]