某典型复杂薄壁铝合金支架铸件采用ZL114A合金,基于支架铸件结构形状与铸造工艺难点分析,试验设计了熔模与石膏型复合型壳结合低压铸造成形工艺进行生产。结果表明,通过在铸件薄壁区域增设加强筋与排气条、优化低压充型及T6热处理参数,有效解决了薄壁支架铸件的浇不足、缩松等缺陷,生产出了高性能的合格铸件。 ZL114A alloy is used to cast a typical complex thin-walled aluminum alloy bracket. Based on the structural shape of the bracket castings and the difficulties in the casting process, the design of the investment and gypsum composite shell combined with the low-pressure casting and forming process was conducted. The results show that by adding stiffeners and exhaust bars in the thin-wall area of ​​castings, optimizing the parameters of low-pressure filling and T6 heat treatment, the defects such as inadequate pouring and shrinkage of thin-wall support castings are effectively solved, and qualified castings with high performance are produced .