通过控制挤压比、成形温度的方法,对汽车发动机用铸造Al-17Si-5Fe合金进行了半固态成形工艺研究,研究了不同工艺参数下合金的组织与性能变化规律。结果表明,Al-17Si-5Fe合金适宜的半固态成形工艺为:成形温度600℃、挤压比10︰1;合金中的初生硅和富Fe相得到了较好的细化,分布较为均匀,合金取得了良好的强度与塑性结合。 By controlling the extrusion ratio and forming temperature, the semi-solid forming of Al-17Si-5Fe alloy for automobile engine was studied, and the microstructure and properties of the alloy under different process parameters were studied. The results show that the suitable semi-solid forming process of Al-17Si-5Fe alloy is as follows: the forming temperature is 600 ℃ and the extrusion ratio is 10: 1; the primary silicon and Fe-rich phase in the alloy are well refined and the distribution is relatively uniform, Alloy made good combination of strength and plasticity.