| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Processing Fundamentals: Thermodynamics and Rate Phenomena
|
| Presentation Title |
Thermodynamic equilibria of yttrium and sulfur in liquid iron |
| Author(s) |
Jian Kang, Hong-po Wang, Yu Wang |
| On-Site Speaker (Planned) |
Jian Kang |
| Abstract Scope |
Sulfur is an impurity element that generally reduces the mechanical performance and corrosion resistance of steel, and should be removed as much as possible in steelmaking. Yttrium has a strong affinity for [S] and significantly reduces the content of [S] by forming sulfides. Accurate thermodynamic data is integral to studying the Y-desulfurization reaction and inclusion modification. This work used a high-purity yttria crucible to investigate the thermodynamic equilibrium of [Y] and [S] under an argon atmosphere in an induction furnace. The equilibrium constant and interaction coefficient of yttrium desulfurization in liquid iron were determined at 1600-1700℃. The results show that the relationship between the equilibrium constant of Y-desulfurization and temperature can be expressed as:
logK(K=aYaS/aYS)=-15151.05/T+3.12 1600-1700℃
K'=[%Y][%S] can be expressed as:
logK'=(-15151.05/T+3.12)-(-8076.88/T+1.47)(2.8[%S]+[Y])
The first-order interaction coefficient e(S,Y) can be presented as:
e(S,Y)=-8076+1.47 |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Other, Other, Other |