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利用喷射沉积技术制备了Al－20Si－5Fe－3Cu-1Mg合金,借助扫描电镜（SEM），X-射线衍射和拉伸试验等手段研究了喷射沉积合金的微观组织和力学性能，分析了Fe对合金挤压和热处理后的组织变化．拉伸试验结果表明，喷射沉积Al－20Si-5Fe-3Cu-1Mg合金具有比粉末冶金Al-20Si-3Cu-1Mg合金更高的高温（300℃）强度．
The Al-20Si-5Fe-3Cu-1Mg alloy was prepared by spray deposition. The microstructure and mechanical properties of the spray deposited alloy were studied by scanning electron microscopy (SEM), X-ray diffraction and tensile test. Alloy extrusion and heat treatment after the organizational changes. Tensile test results show that spray-deposited Al-20Si-5Fe-3Cu-1Mg alloy has higher high temperature (300 ℃) strength than powder metallurgy Al-20Si-3Cu-1Mg alloy.