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利用光学显微镜、X射线衍射仪研究了直流磁场作用下的熔体温度对Mg97Y2Cu1合金凝固组织的影响。结果表明:施加直流磁场并控制熔体温度,合金的凝固组织得到改善,其初生相转变为破碎的枝晶,第二相分布变得均匀和连续。在直流磁场作用下,随着熔体温度的提高,合金的晶粒尺寸先增大后减小,其转折点为750℃;在相同的熔体温度下,磁场处理后的合金晶粒尺寸均比未处理时小。直流磁场对合金的结晶取向能产生显著的影响,合金X射线衍射图谱的最强峰从(0002)面转移到(1010)面;熔体温度对合金的结晶取向影响较小。
The effect of melt temperature on the solidification microstructure of Mg97Y2Cu1 alloy was studied by means of optical microscope and X-ray diffractometer. The results show that when the DC magnetic field is applied and the melt temperature is controlled, the solidified microstructure of the alloy is improved. The primary phase is transformed into broken dendrite, and the second phase is distributed uniformly and continuously. Under the action of DC magnetic field, the grain size of the alloy first increases and then decreases with the increase of the melt temperature, and the turning point is 750 ° C. At the same melt temperature, the alloy grain size after the magnetic field treatment is both Not treated when small. DC magnetic field has a significant effect on the crystal orientation of the alloy. The strongest peak of the X-ray diffraction pattern of the alloy is transferred from the (0002) plane to the (1010) plane. The melt temperature has little effect on the crystal orientation of the alloy.