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研究了稀土Ce、Sm对AZ80镁合金组织和力学性能的影响。结果表明,添加稀土元素Ce和Sm后合金晶粒明显细化;组织中分别形成杆状析出相(Al4Ce)和颗粒状析出相(Al3Sm),减少了合金中β相(Mg17Al12)数量,并使连续网状分布的β相变得断续,从而提高合金的强度、硬度和伸长率。综合分析认为AZ80-1.0Sm合金的力学性能最优,抗拉强度达到213 MPa。
The effects of rare earth Ce, Sm on the microstructure and mechanical properties of AZ80 magnesium alloy were studied. The results show that the grain size of the alloy is obviously refined with the addition of rare earth elements Ce and Sm. The precipitated phase (Al4Ce) and the precipitated phase (Al3Sm) are formed respectively in the microstructure, and the amount of β phase (Mg17Al12) The continuous reticular distribution of β phase become intermittent, thereby increasing the strength of the alloy, hardness and elongation. The comprehensive analysis shows that AZ80-1.0Sm alloy has the best mechanical properties and the tensile strength reaches 213 MPa.