Deoxidation Thermodynamics of β-Titanium by Ca-CaCl2 and Ca-CaF2 Fluxes

Seung-Min Han; Young-Seok Lee; Joo-Hyun Park; Good-Sun Choi; Dong-Joon Min

doi:10.2320/matertrans.MRP2008284

This article has now been updated. Please use the final version.

Deoxidation Thermodynamics of β-Titanium by Ca-CaCl₂ and Ca-CaF₂ Fluxes

Seung-Min Han, Young-Seok Lee, Joo-Hyun Park, Good-Sun Choi, Dong-Joon Min

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Keywords: titanium, deoxidation, calcium, halide flux, activity

JOURNAL RESTRICTED ACCESS Advance online publication

Article ID: MRP2008284

DOI https://doi.org/10.2320/matertrans.MRP2008284

The final version of this article is now available: Vol. 50 (2009) , No. 1 p.215

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Abstract

Deoxidation of β-titanium was investigated by Ca-CaCl₂ and Ca-CaF₂ fluxes at 900 to 1400°C. The content of oxygen in Ti was strongly dependent not only on the Ca potential but on the stability of CaO in the fluxes. The present experimental results indicate that deoxidation of Ti by Ca-calcium halide fluxes could be controlled by the activity ratio of CaO to Ca. The ratio of a_CaO⁄a_Ca=0.06∼0.1 was strongly recommended for obtaining oxygen content of 40∼160 ppm.

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