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Deoxidation of TiAl Alloy Scraps with Metallic Yttrium and Calcium Fluoride Slag

  • Lina Jiao
  • Shihua Wang
  • Fuhao Xiong
  • Guangyao Chen
  • Zhihe Dou
  • Xionggang Lu
  • Chonghe LiEmail author
Conference paper
  • 358 Downloads
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

Recently, the recycle of TiAl scrap becomes an important issue; however, its high oxygen content, which deteriorates mechanical properties, should be deoxidized. In this study, the scrap of TiAl alloy is melted using the water-cooling copper crucible, then the metallic yttrium and calcium fluoride slag are added on this melt. The deoxidation behavior of scrap is investigated, and the change of oxygen concentration is measured to evaluate the performance of this novel deoxidation technology. The results showed that the oxygen content of TiAl alloys under atmospheric pressure varied between 0.169 and 0.182 wt%. When the sample cell was vacuumed, the oxygen content varied between 0.131 and 0.167 wt%. In addition, the TiAl alloy contains a certain amount of element Y after deoxidation. This fact shows that the metallic yttrium and calcium fluoride slag exhibit a good deoxidation for the TiAl alloy melts. It may be one of the promising deoxidation processes of scrap of TiAl alloy.

Keywords

Ti–46Al–8Nb alloy Recycling Deoxidation Yttrium 

Notes

Acknowledgements

This work was financially supported by Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education) open subject; the National Natural Science Foundation of China-CHINA BAOWU STEEL GROUP Joint research fund for iron and steel (No. U1860203); National Natural Science Foundation of China (No. U1760109); Shanghai education commission innovation program (No. 15ZS030).

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Copyright information

© The Minerals, Metals & Materials Society 2020

Authors and Affiliations

  • Lina Jiao
    • 1
    • 3
  • Shihua Wang
    • 4
  • Fuhao Xiong
    • 1
  • Guangyao Chen
    • 1
  • Zhihe Dou
    • 2
  • Xionggang Lu
    • 1
    • 5
  • Chonghe Li
    • 1
    • 5
    Email author
  1. 1.State Key Laboratory of Advanced Special Steel, Shanghai Key Laboratory of Advanced Ferrometallurgy, School of Materials Science and EngineeringShanghai UniversityShanghaiChina
  2. 2.Key Laboratory for Ecological Metallurgy of Multimetallic Mineral, Ministry of EducationNortheastern UniversityShenyangChina
  3. 3.School of Metallurgy and Materials EngineeringJiangsu University of Science and TechnologyZhangjiagangChina
  4. 4.Shanghai University LibraryShanghaiChina
  5. 5.Shanghai Special Casting Engineering Technology Research CenterShanghaiChina

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