Effects of electromagnetic vibration from static magnetic and alternative current on solidification structure of horizontal continuous casting pure Sn thin ribbon and Sn-10Pb thin ribbon were analyzed by thermal-physical experiment. The results reveal that with electromagnetic vibration

solidification structure of pure Sn is greatly refined

which is refiner with increasing in current intensity. By applying electromagnetic vibration on solidification front of Sn-10Pb alloy

creation of equiaxed grain zone in the center of thin-ribbon can be distinctly accelerated

which is enlarged with increasing in electromagnetic intensity. Electromagnetic vibration forces can increase the nucleation rates through cracking and flaking primary phase as a result of periodical mechanical effects

such as tension

compression

shearing

bending and torturing

meanwhile

magnetic vibration can restrain the growth of columnar grain by decreasing gradient as a result of the homogeneous tendency of temperature and solute at solidification front of solid-liquid interface by partial stirring

which are responsible for the refinement and equiaxed grain formation of structure in condition of low intensity electromagnetic vibration.