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2198鋁鋰合金的熔煉、軋制和熱處理
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1.沈陽航空航天大學(xué);2.中國科學(xué)院金屬研究所

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國家自然科學(xué)基金資助(51605310)；遼寧省教育廳基金資助(L201631)；航空制造工藝數(shù)字化國防重點學(xué)科實驗室開放基金資助(SHSYS2016004)


Processing of 2198 Al-Li alloy: melting, rolling and heat treatment
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1.Shenyang Aerospace University;2.Institute of Metal Research Chinese Academy of Sciences

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    摘要:

    鋁鋰合金具有高比強(qiáng)度和高比模量等優(yōu)點，廣泛應(yīng)用于航空領(lǐng)域。本文系統(tǒng)研究了2198鋁鋰合金的制造工藝，成功制備了性能優(yōu)越的板材，為其工業(yè)生產(chǎn)提供了理論依據(jù)。采用真空感應(yīng)熔煉法制備了2198鋁鋰合金鑄錠，均勻化處理后，利用多道次熱軋將鑄錠軋制為板材，經(jīng)過固溶、淬火、預(yù)變形、自然時效和人工時效處理，板材沿軋制方向的抗拉強(qiáng)度高達(dá)486MPa。人工時效過程中析出的T1時效相（Al2CuLi），不僅能明顯提高板材強(qiáng)度，而且有利于弱化其各向異性。

    Abstract:

    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.

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引用本文

趙天章,金龍,高鐵軍,劉春忠,徐勇,張士宏.2198鋁鋰合金的熔煉、軋制和熱處理[J].稀有金屬材料與工程,2019,48(7):2305~2309.[Zhao Tianzhang, Jin Long, Gao Tiejun, Liu Chunzhong, Xu Yong, Zhang Shihong. Processing of 2198 Al-Li alloy: melting, rolling and heat treatment[J]. Rare Metal Materials and Engineering,2019,48(7):2305~2309.]
DOI：10.12442/j. issn.1002-185X.20180795

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  • 收稿日期:2018-07-24
  • 最后修改日期:2018-08-06
  • 錄用日期:2018-08-31
  • 在線發(fā)布日期: 2019-08-01
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