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不同熔體熱處理工藝后Al-Cu-Ti合金的晶粒細(xì)化及力學(xué)性能改善
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濟(jì)南大學(xué)

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國家自然科學(xué)基金項(xiàng)目(Grants Nos. 51772132)；山東省自然科學(xué)基金(ZR2019MEM019)


Grain refinement and mechanical properties of Al-Cu-Ti alloys after different melt heat treatment processes
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University of Jinan

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National Natural Science Foundations of China (Grants Nos. 51772132)；Natural Science Foundation of Shandong Province of China (ZR2019MEM019)

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    摘要:

    本文研究了添加細(xì)化劑和不同熱處理工藝（過熱處理和熱速處理）對Al-Cu合金的改性。分析了Al-Cu-Ti合金的相組成、凝固微觀組織和力學(xué)性能。此外，采用差示掃描量熱法（DSC）研究了Al-Cu-Ti合金在不同熔體熱處理工藝后的熔體結(jié)構(gòu)轉(zhuǎn)變行為。實(shí)驗(yàn)結(jié)果表明，熱速處理極大地細(xì)化了Al-Cu-Ti合金晶粒，且力學(xué)性能得到有效改善。通過對熱力學(xué)相變分析，發(fā)現(xiàn)Al-Cu-Ti合金經(jīng)過熱處理和熱速處理后的熔化潛熱隨著界面能的增大而變小，從而在一定程度上細(xì)化了合金的微觀組織。

    Abstract:

    In this study, the modification of Al-Cu alloy by adding grain refiner combined with different heat treatments (superheat treatment and thermal rate treatment) is investigated. The phase composition, solidification microstructure and mechanical properties of Al-Cu-Ti alloys are analyzed. Moreover, the melt structure transformation of Al-Cu-Ti alloys after different melt heat treatments was studied by DSC. The experimental results showed that the thermal rate treatment greatly refined the grain of Al-Cu-Ti alloy and improved the mechanical properties. Through the analysis of thermodynamic phase transition, it was found that the latent heat of fusion of Al-Cu-Ti alloy after superheat treatment and thermal rate treatment became smaller due to the increase of interfacial energy, which leads to refine the microstructure of alloy to some extent.

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王琳,孫昱,薄琳,左敏,趙德剛.不同熔體熱處理工藝后Al-Cu-Ti合金的晶粒細(xì)化及力學(xué)性能改善[J].稀有金屬材料與工程,2020,49(8):2615~2622.[Wang Lin, Sun Yu, Bo Lin, Zuo Min, Zhao Degang. Grain refinement and mechanical properties of Al-Cu-Ti alloys after different melt heat treatment processes[J]. Rare Metal Materials and Engineering,2020,49(8):2615~2622.]
DOI：10.12442/j. issn.1002-185X.20190444

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  • 收稿日期:2019-05-24
  • 最后修改日期:2019-08-18
  • 錄用日期:2019-09-06
  • 在線發(fā)布日期: 2020-09-27
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