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过在合金凝固过程中施加机械搅拌制备含长周期结构的Mg_(97)Zn_1Y_2合金,通过改变搅拌时间以及搅拌转速工艺参数制备多组试样,研究机械搅拌对镁合金组织细化及力学性能的影响。通过光学显微镜、扫描电镜(SEM)观察合金的显微组织,利用显微硬度仪对试样进行了硬度测试,采用析氢法对试样进行耐腐蚀性能的测试,探究最佳搅拌时间及搅拌速率。研究结果表明:经搅拌处理后,试样的组织形态及尺寸发生不同程度的细化,合金的硬度及耐腐蚀性能也发生了较大变化。就本实验参数而言,搅拌速率为700 r/min、搅拌时间为2 min时合金力学性能最好。
A series of samples were prepared by changing the mixing time and the process parameters of stirring speed, and the mechanical stirring was used to study the microstructure and mechanical properties of the magnesium alloy after mechanical stirring was applied to solidify Mg_ (97) Zn_1Y_2 alloy with long periodical structure. influences. The microstructure of the alloy was observed by optical microscope and scanning electron microscope (SEM). The hardness of the alloy was measured by microhardness tester. The corrosion resistance of the sample was tested by hydrogen evolution method. The optimum mixing time and stirring rate . The results show that the microstructure and the size of the sample are refined to different degrees after being stirred, and the hardness and corrosion resistance of the alloy also change greatly. In terms of the experimental parameters, the mechanical properties of the alloy are the best when the stirring rate is 700 r / min and the stirring time is 2 min.