A complicated thin-walled cone housing was produced with ZL205 Aalloy.Combining with the solidification characteristics and structure formability analysis of ZL205 Aalloy

a bottom pouring gravity filling method was designed for investment casting cone housings

and the distribution of solidification

temperature and solid phase precipitation was calculated by the finite element simulation.The results show that the total gravity filling time is 21 s

and the complete solidification and solid phase precipitation time reach 374 sand 424s

respectively

by designing the bottom gravity filling for investment casting ZL205 Aalloy housings

meanwhile

the directional solidification from bottom to top and from inside to outside can be realized.The average grain size in the alloy housings at as-cast and T5 heat treatment reach 112μm and 94μm

respectively.The mechanical properties of test sample at T5 heat treatment state that cut out from the rib region were tested

where average tensile strength

yield strength

elongation and brinell hardness reach 453 MPa

400 MPa

8.9% and 114 HBS

respectively

meeting the design specification.