针对现阶段大型复杂压铸件一体化成形所面临的工艺调控困难、产品合格率低与不同区域性能差异大等 问题，基于材料基因工程思想，使用集成计算平台研究了压铸工艺中浇注温度和模具温度对压铸件组织与性能的影响， 利用模拟优化参数进行了实验验证，并进一步研究了不同充型距离对材料组织与性能的影响。结果表明，随着模具温度 升高，熔体充型能力得以提高，晶粒尺寸有所增加，而孔隙率呈减小趋势。同时，随浇注温度升高，熔体充型能力、晶粒尺 寸与孔隙率均有所增加。当浇注温度为750℃，模具温度为250℃时合金具有良好的充型能力与微观组织。随充型距离 的增加，合金中的压室预结晶组织(ESCs)的面积分数呈减小趋势，其形貌由粗大树枝晶转变为破碎枝晶状、条状或球粒 状，并且其孔隙率呈现先减小后增加的趋势，力学性能则呈现先增加后减小的趋势。 在充型650mm时仍具有较好的力 学性能，表明在该工艺参数下Al-7Si-Mg-Cu合金的允许最大充型距离达到650mm。

To address the current challenges of difficult process control, low product qualification rates, and significant performance disparities among various sections in large complex die-castings, the effects of pouring temperature and mold temperature on the microstructure and properties of die-castings were investigated via an integrated computational platform guided by the concept of material genetic engineering. The experimental preparation was carried out via the parameters used in the simulation, and the effects of different filling distances on the microstructure and properties of the materials were further studied. The results show that with increasing mold temperature, the melt flow ability increases, the grain size increases, and the porosity decreases. Similarly, with increasing pouring temperature, the melt flow ability, grain size and porosity increase. When the pouring temperature is 750 ℃ and the mold temperature is 250 ℃, the alloy has good filling ability and microstructure. The analysis of microstructure and mechanical properties under different filling distances shows that with increasing filling distance, the area fraction of ESCs (externally solidified crystals) decreases, and their morphology changes from coarse dendrites to broken dendrites, strips and spheres. The porosity first decreases but then increases, and the mechanical properties first increase but then decrease. The material still has good mechanical properties at 650 mm, indicating that the maximum allowable filling distance of the Al-7Si-Mg-Cu alloy reaches 650 mm under this process.