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赵天章,金龙,高铁军,刘春忠,徐勇,张士宏.2198铝锂合金的熔炼、轧制和热处理[J].稀有金属材料与工程(英文),2019,48(7):2305~2309.[Zhao Tianzhang,Jin Long,Gao Tiejun,Liu Chunzhong,Xu Yong and Zhang Shihong.Processing of 2198 Al-Li alloy: melting, rolling and heat treatment[J].Rare Metal Materials and Engineering,2019,48(7):2305~2309.]
Processing of 2198 Al-Li alloy: melting, rolling and heat treatment
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Received:July 24, 2018  Revised:August 06, 2018
Key words: Al-Li alloy  melting  rolling  heat treatment
Foundation item:国家自然科学基金资助(51605310);辽宁省教育厅基金资助(L201631);航空制造工艺数字化国防重点学科实验室开放基金资助(SHSYS2016004)
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Zhao Tianzhang,Jin Long,Gao Tiejun,Liu Chunzhong,Xu Yong and Zhang Shihong  
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      Al-Li alloy is widely used in the aerospace field, due to its high specific strength and high specific modulus. The processing of 2198 alloy is investigated. 2198 alloy sheet with excellent mechanical properties is successfully manufactured. It will help the industrial production of 2198 Al-Li alloy. The ingot is melted and cast in vacuum induction melting (VIM) furnace. During the followed homogenization the as-cast microstructure can be completely vanished. The ingot is rolled to sheet with 2mm thickness, via multi-pass hot-rolling. Then, the solution, water quenching, pre-deformation, naturally aging and artificial aging are respectively carried out. The tensile strength of final 2198 Al-Li alloy sheet in the rolling direction is 486MPa. The precipitate T1 generated in the artificial aging can not only increase the strength obviously, but also decrease the anisotropy of 2198 Al-Li alloy sheet.