Mechanical properties and microstructure of squeezing casting A356.2 spring seat were investigated

and the filling and solidification were simulated by the Anycasting software.Meanwhile

the phenomenon of tensile fractures concentrated on the bottom of the samples was described by the Anycasting software.It is found that the tensile strength

yield strength and elongation of as-cast samples reach 268 MPa and 184 MPa

9.3%

respectively

and after T6 treatment

the mechanical properties of the spring seat reach 330 MPa and 266 MPa

6.4%

respectively.Within a certain range

with the increase of the filling speed and casting pressure

tensile strength and elongation are increased

while change of yield strength can be ignored.After squeeze casting

α-Al phase in the spring seat is refined and tends to agglomeration

however

little impact on the eutectic phase can be observed.The filling and solidification simulation results show that there are three eddy distributed in the bottom

middle and upper of spring seat

and hot spot at the corner of spring seat can be observed

leading to the possible occurrence of shrinkage porosity.The tensile fractures concentrated on the bottom of the samples is attributed to coaction of inclusions and gas involved

which can be eliminated by sectionally changing velocity technique.