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在AM60镁合金的基础上添加不同质量分数的富Y混合稀土(分别为0.5%,1.0%,1.5%,2.0%),研究了富钇混合稀土对AM60镁合金显微组织与力学性能的影响。结果表明:富Y稀土的加入使AM60镁合金的显微组织明显细化,并能显著提高合金的抗拉强度、屈服强度及延伸率。加入混合稀土后,合金中形成块状的铝钇化合物Al2Y,Al6Mn6Y,β-Mg17Al12相数量减少。当稀土加入量为1%时,合金的各方面性能达到最好。
The effects of Yttrium-rich mischmetal on the microstructure and mechanical properties of AM60 magnesium alloy were studied on the basis of AM60 magnesium alloy with Y-rich mischmetal (0.5%, 1.0%, 1.5%, 2.0% . The results show that the microstructure of AM60 magnesium alloy is obviously refined by the addition of Y-rich rare earth, and the tensile strength, yield strength and elongation of the alloy can be significantly improved. After adding rare earth elements, the amount of Al 2 Y, Al 6 Mn 6 Y and β-Mg 17 Al 12 forming massive aluminum yttrium in the alloy decreases. When the amount of rare earth added is 1%, all aspects of the alloy to achieve the best performance.