G040083 Metal flow joining for aluminium die-casting components

Abstract

Aluminum die-casting (ADC) is light and functional material that is extensively used in car parts for lightweight solution. But, joining ADC and other metal is difficult, because ADC is brittle, low-thermal conductance and low electrical resistance materials. So, previously, bolts and nuts joining which is expensive and troublesome are used for ADC. Therefore this is obstacle for popular use in low-end car. In this study, we apply metal flow joining to ADC joining focus on property that in compression state even brittle material has ductility. At first, we investigate plastic deformability of ADC in compression state. Next, we set some parameter of ADC ring width, punch width, punch angle and groove shape, and experienced axial and circumferential direction strength test to optimize metal flow joining. As a result, ADC strained up to 18% in compression state. Therefore, ADC can apply to metal flow joining. And, Metal flow joining's strength is related to metal flow volume.