Mn、Re对AZ102镁合金组织性能的影响  

Effects of Mn and Re on Microstructure and Mechanical Properties of AZ102 Alloys

作　　者：鲁进波 王静鸽[1] 王智民[1] 

机构地区：[1]西安理工大学材料科学与工程学院,陕西西安710000

出　　处：《热加工工艺》2015年第16期171-174,共4页Hot Working Technology

摘　　要：研究了不同含量的Mn和Re对AZ102镁合金组织性能的影响。结果发现,加入Mn后合金中的β相被细化成颗粒状弥散分布于基体内,还出现了颗粒状的Al-Mn化合物,随Mn含量的增加,Al-Mn相尺寸变大。在含Mn的镁合金基础上加入稀土后,晶粒尺寸明显细化,β相变得更加弥散,同时加入的Re会和Al形成Al4Re相并随Re含量的增加,Al4Re相会由颗粒状变为短杆状再变为针状,并且Al-Mn颗粒相也会受到Re含量的影响使得合金中形成大颗粒的Al-Mn化合物。添加0.2%Mn和0.5%Re时,组织中的一部分颗粒状Al4Re相转变为短杆状,Al-Mn相也较细小,该合金的综合性能最好,抗拉强度249.6 MPa、伸长率5.65%和硬度71 HB相比1#合金分别提高了24.3%、232.4%和6.3%。The effects of different levels of Mn and Re on the tissue properties of AZ102 alloys were studied. The results show that β phase is refined into granule and disperses in the matrix after adding Mn, and the granular Al-Mn compounds appear, with the increases of Mn, the size of AI-Mn becomes larger. After adding rare earth in magnesium alloy which containing Mn, the grain size refines obviously, β-phase becomes more diffusely, while the Re can form Al4Re with Al, with Re content increasing, Al4Re phase changes by granular the short rod further into the needle, and the particulate phase of Al-Mn also will be affected by the content of Re so that the large particles compounds appear. When adding 0.2% Mn and 0.5% Re, the part of the microstructure of the granular Al4Re phase becomes a short rod, Al-Mn is tiny, which is best for the comprehensive performance of the alloy, compared with 1^# alloy, the tensile strength of 249.6 MPa, elongation of 5.65% and hardness of 71HB increases by 24.3%, 232.4% and 6.3%, respectively.

关 键 词：MN RE AZ102镁合金 微观组织 力学性能 

分 类 号：TG131[一般工业技术—材料科学与工程]