ZL305 alloy containing Ce and La elements was prepared by squeeze casting and permanent mould casting.The effects of squeeze casting as well as Ce and La mixed additions on the microstructure and mechanical properties of the alloy were analyzed.The results reveal that the Ce and La mixed addition can reduce positively the grain size of ZL305 alloy prepared by permanent mould casting and the mechanical properties reach the satisfied values with 0.1% mixture RE addition

where the tensile strength and elongation are increased to 227.88 MPa and 6.47%

respectively.The squeeze casting process can refine grain size

which are responsible for the improvement of mechanical properties

such as elongation and tensile strength.With 0.2% of mixture RE addition

the tensile strength and elongation are increased to 302.35 MPa and 7.23%

respectively.After T6 solution treatment at 430℃for 10 h

mechanical properties of the squeezed casting alloy are enhanced obviously.