2015-Sustainable Industrial Processing Summit
SIPS 2015 Volume 8: Composite & Ceramic, Quasi-crystals and Nanomaterials
| Editors: | Kongoli F, Pech-Canul M, Kalemtas A, Werheit H |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2015 |
| Pages: | 300 pages |
| ISBN: | 978-1-987820-31-7 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Deoxidation of Molten Titanium by Calcium Treatment
Byungmoon Moon1; Jong-Hyun Seo1; Hyun-Do Jung1;1KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY, Incheon, Korea (Republic of [South] Korea);
Type of Paper: Regular
Id Paper: 304
Topic: 8
Abstract:
Titanium (Ti), the fourth richest metallic element in the earth's crust, is widely used and researched in a variety of applications such as aerospace, marine, and medicine due to its excellent specific strength and corrosion resistance. Recently, many researchers have focused on the refining process of Ti because the global production of Ti is low compared to iron and aluminium and recycling Ti waste is crucial. The important step in refining Ti is the deoxidation process. The oxygen dissolved in Ti reduces the ductility and fatigue resistance of the material, which consequently causes poor forming ability. However, Ti's inherent properties such as its high melting point (1668 C) and oxygen affinity at high temperatures cause the deoxidation process to be difficult. Particularly, the Ti scrap and chip have high oxygen contents owing to hot processing and cutting. In this study, the effects of Ca which has higher oxygen affinity than titanium on deoxidation of titanium and the rate of deoxidation in terms of time were evaluated. The Ti scrap was melted using electro-magnetic induction and deoxidized with calcium (Ca) granules.
Keywords: Titanium, Deoxidation, Oxygen, Refining mechanism