金属热处理 ›› 2020, Vol. 45 ›› Issue (5): 180-182.DOI: 10.13251/j.issn.0254-6051.2020.05.035

• 工艺研究 • 上一篇    下一篇

退火工艺对变形高纯Yb微观组织的影响

邓月华1,2, 王志坚1,2, 刘华1,2, 刘维1,2, 黄美松1,2, 张闻扬1,2, 黄培1,2   

  1. 1. 湖南稀土金属材料研究院, 湖南 长沙 410126;
    2. 稀土功能材料湖南省重点实验室, 湖南 长沙 410126
  • 收稿日期:2019-10-18 出版日期:2020-05-25 发布日期:2020-09-02
  • 作者简介:邓月华(1984—),女,高级工程师,硕士,主要研究方向为有色金属材料加工,E-mail:dyhcsu@163.com
  • 基金资助:
    国家重点研发计划(2017YFB0405900);稀土功能材料湖南省重点实验室(2017TP1031)

Effect of annealing process on microstructure of deformed high purity ytterbium

Deng Yuehua1,2, Wang Zhijian1,2, Liu Hua1,2, Liu Wei1,2, Huang Meisong1,2, Zhang Wenyang1,2, Huang Pei1,2   

  1. 1. Hunan Rare Earth Metal Material Research Institute, Changsha Hunan 410126, China;
    2. Hunan Key Laboratory for Rare Earth Functional Materials, Changsha Hunan 410126, China
  • Received:2019-10-18 Online:2020-05-25 Published:2020-09-02

摘要: 对纯度为99.99%的高纯Yb进行总变形量为35.6%的多道次室温轧制变形加工,并对其分别在240、270、300、330、360 ℃进行退火处理,研究了退火工艺对变形高纯Yb显微组织和显微硬度的影响。结果表明,最佳退火工艺为270 ℃×0.5 h,经270 ℃×0.5 h退火后,变形高纯Yb完全再结晶,晶粒细小、均匀,平均晶粒度为22.5 μm左右,硬度值下降至18.96 HV0.5。随着退火温度的升高,试样的平均晶粒尺寸呈上升趋势,显微硬度呈降低趋势并趋于平稳。

关键词: 变形高纯Yb, 退火工艺, 微观组织, 显微硬度

Abstract: 99.99% high purity ytterbium was rolled by multipass rolling with total deformation of 35.6% at room temperature, and then was annealed at 240, 270, 300, 330, and 360 ℃, respectively. The effects of annealing process on the microstructure and microhardness of the deformed high purity ytterbium were analyzed. The results show that the optimum annealing process is at 270 ℃ for 0.5 h. After annealing at 270 ℃ for 0.5 h, the deformed high purity ytterbium is fully recrystallized and obtains uniform fine grains with the average grain size of about 22.5 μm, while the hardness decreases to 18.96 HV0.5. With the increase of annealing temperature, the average grain size increases, the microhardness decreases and tends to be stable.

Key words: deformed high purity ytterbium, annealing process, microstructure, microhardness

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