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研究了RE对改良铸造铝硅合金力学性能的影响。研究结果表明,RE对改良铸造铝硅合金力学性能有着显著的影响。随着稀土元素加入量的增加,改良合金的强度、塑性均显著提高,但过多的稀土元素加入量会使改良合金形成大量的AlxV3CuRE化合物,反而会导致改良铸造铝硅合金的力学性能恶化。
The effect of RE on the mechanical properties of modified cast Al-Si alloy was investigated. The results show that RE has a significant effect on the mechanical properties of modified cast Al-Si alloys. With the addition of rare earth elements, the strength and plasticity of the modified alloys are significantly increased. However, excessive addition of rare earth elements will lead to the formation of a large amount of AlxV3CuRE compounds in the modified alloys, which may lead to the deterioration of the mechanical properties of the modified cast Al-Si alloys.