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低膨脹高溫合金晶粒長大規(guī)律及對其性能的影響
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1.西部超導(dǎo)材料科技股份有限公司;2.中國科學(xué)院沈陽金屬研究所

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陜西省重大科技項(xiàng)目(項(xiàng)目號(hào)2020zdzx04-04-02)


Grain growth of low expansion superalloy and its effect on its properties
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1.Western Superconducting Technologies Co,Ltd Xi’an;2.Institute of Metal Research,Chinese Academy of Sciences Shenyang

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    摘要:

    本文通過研究不同熱處理制度對低膨脹高溫合金析出相的行為以及晶粒長大的影響。實(shí)驗(yàn)結(jié)果表明,在Laves相析出峰溫度范圍(980℃~990℃)保溫不同時(shí)間,Laves相尺寸逐漸增大,晶粒不長大。在1000℃~1040℃保溫1h后Laves相開始溶解,晶粒逐漸長大至4級(jí)、3.5級(jí)、3級(jí)、2級(jí),因此在熱加工過程中為避免晶粒度長大,熱變形加熱溫度不應(yīng)超過1010℃,或在1000℃變形且保溫時(shí)間不應(yīng)超過1h。晶界Laves相的含量對合金性能影響較小,而合金的晶粒度對其影響較大。

    Abstract:

    Effects of different heat treatment regimes on the precipitate behavior and grain growth of low expansion superalloy were studied. The experimental results show that the size of Laves phase increases gradually but the grain size does not grow when under the Laves phase precipitation peak temperature ranges from 980℃ to 990℃. After holding at 1000℃~1040℃ for 1h, Laves phase began to dissolve, and the grain size gradually grew to grade 4, 3.5, 3 and 2. Therefore, in the process of hot working, to avoid the growth of grain size, the thermal deformation temperature should not exceed 1010℃, or the deformation at 1000℃ and holding time should not exceed 1h. Laves phase content at grain boundary has little effect on the properties of the alloy, but the grain size has a great effect on it.

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引用本文

李萬禮,曹國鑫,劉向宏,孫文儒.低膨脹高溫合金晶粒長大規(guī)律及對其性能的影響[J].稀有金屬材料與工程,2023,52(4):1499~1506.[LI Wanli, CAO Guoxin, LIU Xianghong, SUN Wenru. Grain growth of low expansion superalloy and its effect on its properties[J]. Rare Metal Materials and Engineering,2023,52(4):1499~1506.]
DOI：10.12442/j. issn.1002-185X.20220220

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歷史
  • 收稿日期:2022-03-20
  • 最后修改日期:2022-04-07
  • 錄用日期:2022-04-26
  • 在線發(fā)布日期: 2023-05-01
  • 出版日期: 2023-04-25