A satellite receiver mask casting was manufactured by the ZL114 Aalloy.Based on the analysis of structure characteristics and process properties of casting alloy

the gravity filling system was adopted.The ZL114 A receiver mask castings obtain a solidification sequence from bottom to top and from outside to inside by using of the ProCAST numerical simulation software

and the filling flow field

solidification field and solidified solid phase field were calculated optimizedly together

which avoided the occurrence of gas

slag

loose and shrinkage metallurgical defects.The silicon phase modification was carried out by adding 0.14%Sr element

and the eutectic Si that distributed along the grain boundary shows as spherical and polygonal morphology with the average size of about 4μm.The average tensile strength

yield strength and elongation of body specimens after T6 heat treatment are 333 MPa

273 MPa and 6.2%

respectively

meets the requirements of technical indicators.