本文研究国产８０９０铝锂合金热处理工艺及其组织性能。研究表明：８０９０铝锂合金在５７２±３℃固溶加热、保温３０～６０分钟，水冷，自然时效时间长达３５天以上，机械性能差；在１９０℃，１９小时人工时效，机械性能σｂ＝５１６～５７６ＭＮｍ－２，δ＝６．２～６．３％，金相组织均匀。适当延长固溶处理加热保温时间，对铝锂合金强度有益。用扫描电镜对固溶短时保温水冷的人工时效与自然时效Ａｌ－Ｌｉ合金试样进行了断口分析。 This paper studies the domestic 8090 Al-Li alloy heat treatment process and its microstructure and properties. The results show that the 8090 Al-Li alloy is solution-heated at 572 ± 3 ℃ for 30-60 minutes, water-cooled and naturally aged for more than 35 days with poor mechanical properties. The artificial aging at 190 ℃ for 19 hours has the mechanical properties σb = 516 ~ 576MNm-2, δ = 6.2 ~ 6.3%, the microstructure is uniform. Appropriate to extend the solution heat treatment holding time, beneficial strength of aluminum-lithium alloy. Scanning electron microscopy (SEM) was used to analyze the fracture toughness of artificial aging and natural aging Al-Li alloy specimens.