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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 contents of Mn and Re on the microstructure and properties of AZ102 magnesium alloy were studied. The results showed that the β phase in the alloy was finely dispersed and dispersed in the matrix after addition of Mn, and the granular Al-Mn compound also appeared. With the increase of Mn content, the size of Al-Mn phase became larger. The addition of rare earth into the Mn-containing magnesium alloy results in the grain refinement and the β phase becomes more diffuse. At the same time, the Re addition will form Al4Re phase with Al and will increase with the increase of Re content. Becomes rod-like and then needle-like, and the Al-Mn particle phase is also affected by the Re content, resulting in the formation of large-sized Al-Mn compounds in the alloy. When 0.2% Mn and 0.5% Re were added, some of the granular Al4Re phases in the microstructure turned into short rods and the Al-Mn phase was also finer. The alloy had the best overall properties with a tensile strength of 249.6 MPa and an elongation of 5.65 % And hardness 71 HB compared to 1 # alloy increased by 24.3%, 232.4% and 6.3%.