Based on the vacuum die casting aluminum shock tower developed for Al arc welding platform vehicle body

process modified methods were analyzed

and mechanical performance of the shock tower was evaluated.The results reveal that through increasing the density of aluminum liquid

reducing the Mg content

optimizing heat treatment

the mechanical properties of shock tower can be improved greatly.After T7 temper

the yield strength

tensile strength and elongation of the modified shock tower reach 128.92 MPa

216.18 MPa which is12.14% higher than previous trial-producet and 11.5% which is 56.89% higher than previous trial-producet

respectively

and the density is 2.682 1 g/cm

3

meeting the requirements of design and application.In addition

the welding filler of ER4043 and ER5356 was used to evaluate the welding performance of shock tower.The strength of ER5356 welding joint is more than 160 MPa

and efficiency of welding joint reaches 76%

which is superior to that of ER4043.