Effects of added ways

such as direct addition and master alloy addition

on absorptivity of MM in die casting magnesium alloy were investigated.The results indicate that mistchmetal absorptivity is less than 50% by directly adding mistchmetal with melting at 720℃ in well type crucible furnace for less than 30 min.Mg matrix mischmetal can be prepared by casting combining with squeezing casting method

which exhibits Mg-RE metallic compound with various types and fine grain sizes from OM（optical microscope）analysis

and melting point is higher than die casting temperature from DSC observation

leading to fast solution velocity.The mistchmetal absorptivity can reach 94% and 96%

respectively

with adding mischmetal in as-cast ways and in extruded ways at 720℃ within 10 min in well type crucible furnace.Mischmetal absorptivity can reach up to 80% in die casting AZ91D magnesium in conventional cold chamber die casting machine with adding extruded master alloy

showing acceptable alloying process for RE element.