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2020 | OriginalPaper | Buchkapitel

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

verfasst von : Lina Jiao, Shihua Wang, Fuhao Xiong, Guangyao Chen, Zhihe Dou, Xionggang Lu, Chonghe Li

Erschienen in: TMS 2020 149th Annual Meeting & Exhibition Supplemental Proceedings

Verlag: Springer International Publishing

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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.

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Titel: Deoxidation of TiAl Alloy Scraps with Metallic Yttrium and Calcium Fluoride Slag
verfasst von: Lina Jiao
Shihua Wang
Fuhao Xiong
Guangyao Chen
Zhihe Dou
Xionggang Lu
Chonghe Li
Verlag: Springer International Publishing
Buch: TMS 2020 149th Annual Meeting & Exhibition Supplemental Proceedings
Print ISBN: 978-3-030-36295-9

Electronic ISBN: 978-3-030-36296-6

Copyright-Jahr: 2020
DOI: https://doi.org/10.1007/978-3-030-36296-6_156

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