Effects of electromagnetic field on the cooling curve and solidification structure of Al-Si alloy were described.The cooling curves of alloy in horizontal continuous casting were measured.The results indicate that with alternative electromagnetic field

the initial solidification temperature of the alloy can be increased from 645 ℃ to 656.4 ℃

narrowing the temperature interval

and the solidification time is shortened.In addition

the solidification structure of Al-Si alloy can be evidently refined with exerting electromagnetic field

which is more and more refined and homogenized with the increase of exciting current to 120A.However

the solidification structure can be coarsened with exciting current increasing to 120 A.