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采用散干砂的紧实振动台对ZL101合金消失模壳型铸造的凝固过程施加了机械振动处理,研究了机械振动频率对ZL101合金凝固组织和力学性能的影响,并探讨了机械振动的作用机理。结果表明,随着机械振动频率的增加,ZL101合金中初生相晶粒尺寸和二次枝晶臂间距呈现先减小后增大的趋势,而初生相形状系数则表现为先增加而后减小的趋势;共晶硅长度和共晶硅长宽比呈现先减小而后增加的趋势;ZL101合金的抗拉强度、屈服强度、伸长率和硬度都呈现为先增加后降低的趋势。在机械振动频率为100 Hz时,ZL101合金的组织细化效果最好,且强度、硬度和伸长率达到最大值。
Mechanical vibration treatment was applied to the solidification process of ZL101 alloy lost foam casting, and the influence of mechanical vibration frequency on solidification microstructure and mechanical properties of ZL101 alloy was studied. The mechanism of mechanical vibration was also discussed . The results show that with the increase of mechanical vibration frequency, the grain size and the secondary dendritic arm spacing of ZL101 alloy first decrease and then increase, while the shape coefficient of primary phase increases first and then decreases The trend of eutectic silicon length and eutectic silicon aspect ratio first decreases and then increases. The tensile strength, yield strength, elongation and hardness of ZL101 alloy first increase and then decrease. When the mechanical vibration frequency is 100 Hz, ZL101 alloy has the best microstructure refinement effect and the maximum strength, hardness and elongation.