Composite aluminum alloy wheel and manufacturing method thereof

The invention discloses a composite aluminum alloy wheel and a manufacturing method thereof. A rim part and each spoke part of the wheel are cast and molded correspondingly by adopting different casting methods so as to meet the overall performance requirements of the wheel in the service process; in order to meet different casting process requirements, the alloy material at the rim part is composed of the following components of, in percentage by mass, 4.1%-4.5% of Si, 0.80%-0.85% of Mg, 0.17%-0.2% of Ti, 0.10%-0.15% of Cr, 0.10%-0.15% of Mn, 0.015%-0.017% of Sr and the balance pure aluminum;and the alloy material at each spoke part is composed of the following components of, in percentage by mass, 6.5%-6.7% of Si, 0.21%-0.25% of Mg, 0.13%-0.16% of Ti, 0.18%-0.22% of Cr, 0.18%-0.22% of Mn, 0.16%-0.2% of Zr, 0.011%-0.013% of Sr and the balance pure aluminum. 本发明公开了一种复合铝合金车轮及其制造方法，在车轮的轮辋、轮辐部位分别采用不同的铸造方法进行铸造成型，以满足车轮在服役过程中的整体性能要求；为满足不同的铸造工艺要求，其中轮辋部位合金材料的成分设计按质量百分比构成为：Si 4.1～4.5％，Mg 0.80～0.85％，Ti 0.17～0.2％，Cr 0.1