旋转磁场对铸造Al-Si合金凝固组织及硬度的影响

Effect of Rotating Magnetic Field on Solidification Microstructure and Hardness of Casting Al-Si Alloy

以Al-7Si-0.45Mg合金为研究对象,通过控制变量法分别研究了旋转磁场激励电压、磁场频率、磁场换向时间间隔对亚共晶Al-Si合金凝固组织和硬度的影响。结果表明:当旋转磁场激磁电压为90 V、旋转磁场频率为170 Hz、旋转磁场换向时间间隔为15 s时,Al-7Si-0.45Mg合金组织更加均匀,晶粒更加细小,合金的力学性能更好。

Taking Al-7Si-0.45Mg alloy as the research object,the effects of the excitation voltage,frequency and commutation time interval of rotating magnetic field on the solidification microstructure of hypoeutectic Al-Si alloy were studied by the variable controlling method.The results show that when the exciting voltage was 90 V,the frequency was 170 Hz,and the commutation time interval was 15 s,the microstructure of the Al-7Si-0.45Mg alloy was more uniform,the grains were finer,and the mechanical properties of the alloy were better.