采用喷射成形和挤压工艺制备了8009耐热铝合金,通过金相显微镜、扫描电镜和力学性能测试等试验,对挤压件的组织和性能进行了分析。结果表明:挤压态合金在室温下的抗拉强度达到415MPa,屈服强度达到345MPa,伸长率达到22.5%;在250℃时,合金抗拉强度为221MPa,屈服强度为208MPa,伸长率为13.33%。挤压态8009合金经400℃暴露24h后对合金的中温力学性能没有影响。 The 8009 heat-resistant aluminum alloy was prepared by injection molding and extrusion process. The microstructure and properties of the extruded parts were analyzed by metallographic microscope, scanning electron microscopy and mechanical properties test. The results show that the tensile strength of the extruded alloy reaches 415MPa, the yield strength reaches 345MPa and the elongation reaches 22.5% at room temperature. The tensile strength of the alloy is 221MPa, the yield strength is 208MPa and the elongation is 13.33%. Extruded 8009 alloy exposed to 400 ℃ for 24h has no effect on the mechanical properties of the alloy at mid-temperature.