The semi-solid slurry of 7075aluminum alloy was prepared through a serpentine pouring channel

and influences of pouring temperature

the curve numbers and the curve diameters in the serpentine channel on the microstructure of semi-solid 7075alloy slurry were investigated.The results demonstrate that the semi-solid 7075aluminum alloy slurry with satisfied quality can be generated by a serpentine pouring channel and the solid shell inside the channel can be avoided with the pouring temperature in the range of 660℃～675℃.With a given pouring temperature

the equivalent size of the primary α-Al grains is decreased and the shape factor is increased with the increase of the curve numbers or the decrease of the curve diameters.During the slurry preparation of semi-solid 7075aluminum alloy

the alloy melt changes flow direction many times when it flows in a curved and closed serpentine channel

which result in the primary nuclei gradually evolving into spherical and near-spherical grains as a result of the effect of"stirring" in the serpentine curve.