擇優(yōu)取向程度的鈮板,且再結(jié)晶后,仍然具有較強的{001}擇優(yōu)取向,該織構(gòu)的占優(yōu)有助于獲得微觀組織更均勻的鈮板,本實驗的顯微硬度曲線、再結(jié)晶組織顯微表征、儲存能的半定量計算結(jié)果都印證了這一點。還有一點值得注意,相比于單向軋制,135°周向軋制下獲得的Nb板材在厚度方向上{111}、{100}取向的儲存能差異較小,不會顯示明顯的能量梯度,這一點同樣有助于對高純鈮組織均勻性的優(yōu)化。"/>

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135°周向軋制對高純鈮組織均勻性的優(yōu)化
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作者單位:

1.南昌大學材料科學與工程學院;2.九江有色金屬冶煉有限公司

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基金項目:

國家自然科學基金資助(51564036);江西省重點研發(fā)計劃項目(20192BBE50034)


Optimization of 135° Clock-Rolling for Microstructure Uniformity of High-Purity Niobium
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Affiliation:

1.School of Materials Science and Engineering,Nanchang University;2.Jiujiang Tanbre Co.Ltd

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    摘要:

    傳統(tǒng)工業(yè)上獲取鈮板多采用單向軋制(Unidirectional-Rolling),該工藝下獲得的鈮板在晶粒尺寸和織構(gòu)分布上常表現(xiàn)出強烈的不均勻性,導致其在現(xiàn)代工業(yè)的使用上具有一定局限性。本實驗采用135°周向軋制(135° Clock-Rolling)和單向軋制獲得鈮板,研究了兩種工藝條件下獲得的鈮板在厚度方向上的組織差異。實驗結(jié)果表明,135°周向軋制有助于減小高純Nb板材在厚度方向上的織構(gòu)梯度。此外,135°周向軋制工藝條件下可以獲得具有更高{001}擇優(yōu)取向程度的鈮板,且再結(jié)晶后,仍然具有較強的{001}擇優(yōu)取向,該織構(gòu)的占優(yōu)有助于獲得微觀組織更均勻的鈮板,本實驗的顯微硬度曲線、再結(jié)晶組織顯微表征、儲存能的半定量計算結(jié)果都印證了這一點。還有一點值得注意,相比于單向軋制,135°周向軋制下獲得的Nb板材在厚度方向上{111}、{100}取向的儲存能差異較小,不會顯示明顯的能量梯度,這一點同樣有助于對高純鈮組織均勻性的優(yōu)化。

    Abstract:

    In traditional industries, niobium plates are usually obtained by Unidirectional-Rolling. The niobium plates obtained by Unidirectional-Rolling often show strong unevenness in grain size and texture distribution, which leads to their use in modern industries. The above has certain limitations. In this experiment, 135° Clock-Rolling and Unidirectional-Rolling were used to obtain niobium plates, and the differences in the thickness direction of the niobium plates obtained under the two process conditions were studied. The results show that 135° Clock-Rolling can help reduce the texture gradient of the high-purity niobium sheet in the thickness direction. In addition, niobium plates with a higher degree of {001} preferred orientation can be obtained under the conditions of 135° Clock-Rolling process, and after recrystallization, they still have a strong {001} preferred orientation. This texture The dominance of niobium helps to obtain a more uniform niobium plate, which is confirmed by the microhardness curve, microscopic characterization of recrystallized structure, and semi-quantitative calculation results of storage energy in this experiment. It is also worth noting that compared to Unidirectional-Rolling, the niobium plate obtained under 135° Clock-Rolling has a smaller difference in the storage energy of {111} and {100} orientations in the thickness direction, and does not show a significant energy gradient. This also helps to optimize the uniformity of high-purity niobium.

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曹招,譚敦強,唐曄,馮美兵,朱芳,劉俊榮,聶騰飛,朱楹楹,侯肖.135°周向軋制對高純鈮組織均勻性的優(yōu)化[J].稀有金屬材料與工程,2022,51(5):1705~1712.[Cao Zhao, Tan Dunqiang, Tang Ye, Feng Meibing, Zhu Fang, Liu Junrong, Nie Tengfei, Zhu Yingying, Hou Xiao. Optimization of 135° Clock-Rolling for Microstructure Uniformity of High-Purity Niobium[J]. Rare Metal Materials and Engineering,2022,51(5):1705~1712.]
DOI:10.12442/j. issn.1002-185X.20210355

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  • 收稿日期:2021-04-21
  • 最后修改日期:2021-04-29
  • 錄用日期:2021-05-24
  • 在線發(fā)布日期: 2022-06-09
  • 出版日期: 2022-05-30