Development of Al-15%Si Hypereutectic Alloy Automotive Part by Local Squeeze and Vacuum Diecasting

Abstract

A functional automotive part, reaction shaft support, was fabricated by local squeeze and vacuum Diecasting (LSVD) with light-weight Al-15%Si hypereutectic alloy which has good fluidity and excellent wear resistance. The effects of local squeezing pressure and time-lag of LSVD process on the microstructure of the product were investigated. Measurement of specific gravity with the change of local squeeze pressure and time-lag showed that the local squeezing effect can be increased by increasing squeeze pressure and decreasing time-lag. However, too high a squeeze pressure and too a low time-lag brought about insufficient squeezing effect due to instant movement to the squeeze plunger stroke end point. Through the combination of vacuum suction before melt injection and local squeezing after melt injection in LSVD process, light-weight Al-15%Si alloy reaction shaft support was successfully developed, resulting in excellent microstructural and mechanical properties

Effect of the processing parameters on the microstructure and properties of the ZL116 aluminium alloy after vacuum suction casting

“…1,2 It is most often used in casting. 3 In recent years, the pursuit of light weight in the aerospace and automotive industries also gives the ZL116 aluminium alloy a wide range of applications. [4][5][6] However, there are a large number of solid solutions, an uneven distribution of the microstructure and other defects, 7 which seriously affect the mechanical properties of the castings.…”