宇航材料工艺2026，Vol.56Issue(4)：93-100,8.DOI:10.12044/j.issn.1007-2330.2026.04.009
Al-2.5Cu-1.9Li-X合金的淬火敏感性及淬透性研究
Study on the Quenching Sensitivity and Hardenability of the Al-2.5Cu-1.9Li-X Alloy
李劲风 1曾广俊 1刘添乐 1马鹏程 2陈永来2
作者信息
- 1. 中南大学材料科学与工程学院,长沙 410083
- 2. 航天材料及工艺研究所,北京 100076
- 折叠
摘要
Abstract
The quenching sensitivity and hardenability of the Al-2.5Cu-1.9Li-X alloy were investigated by the interrupted quenching treatment and the method of testing the strength of laminated thin-sheet end-quenching after T8 aging treatment.After solution treatment,the number density of quenching precipitation phases is maximum in the alloys subjected to isothermal annealing at 350 to 380℃,and the electrical conductivity is the highest.Subsequent T6 aging results in a significant reduction of T1(Al2CuLi)precipitates and a rapid decrease in hardness.Based on these results,the C-curve of the alloy is established,and the"nose tip"temperature is approximately 380℃.The incubation period for 5％transformation near the nose temperature is 5.5 s,which is much higher than that of the 2195 Al-Li alloy.Furthermore,after laminated thin-sheet end-quenching and T8 aging,the strength gradually decreases with increasing distance from the quenched end.Taking a 10％decrease in strength relative to that at the quenched end as the depth of hardenability,the quenching depth of the Al-Li alloy reaches 80 to 90 mm,indicating a much better hardenability than that of the high-strength 2195 Al-Li alloy.关键词
铝锂合金/淬火敏感性/淬透性/微观组织Key words
Al-Li alloy/Quenching sensitivity/Hardenability/Microstructure分类
矿业与冶金引用本文复制引用
李劲风,曾广俊,刘添乐,马鹏程,陈永来..Al-2.5Cu-1.9Li-X合金的淬火敏感性及淬透性研究[J].宇航材料工艺,2026,56(4):93-100,8.
