Effects of pulsed magnetic field with different magnetic intensity and frequency on primary Si and eutectic Si phase in microstructure of Al-12.6Si-1Cu Alloy were investigated.At a fixed pulsed magnetic intensity

effect of pulse magnetic field frequency on primary Si and eutectic silicon in microstructure of eutectic Al-Si alloy was analyzed.The result shows that with the frequency of the pulsed magnetic field increased from 0.5Hz to 5Hz

microstructure of primary silicon and eutectic silicon in Al-12.6Si-1Cu alloy are refined obviously firstly and then coarsened.In the case of the pulsed magnetic field frequency of 2Hz

with the intensity of the pulse magnetic field increased from 5×104 A/m to 7×105 A/m

the size of primary silicon and eutectic silicon in the Al-12.6Si-1Cu alloy can be refined firstly

and then coarsened.The influence of the magnetic field intensity on the primary silicon and eutectic silicon is more than that of the frequency.