About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
12th International Symposium on High Temperature Metallurgical Processing
|
Presentation Title |
Effect of Lanthanum on Inclusions in a High Sulfur Steel |
Author(s) |
Sha Ji, Lifeng Zhang, Ying Ren, Xindong Wang |
On-Site Speaker (Planned) |
Lifeng Zhang |
Abstract Scope |
Laboratory experiments were performed to study the evolution of inclusions in a high sulfur non-quenched and tempered steel with the addition of 40 ppm, 200 ppm, and 800 ppm lanthanum. With the increase of lanthanum content in the steel, evolution paths of inclusions were Al-Ca-O→ Al-Ca-(La)-O,Al-Ca-O→ La-O-S and La-S → La-S,Al-Ca-O → La-O-S and La-S. Thermodynamic calculation results show that the evolution path of inclusions with lanthanum additions was Al2O3→ La2O3·Al2O3→ La2O2S→ La2O2S + LaS, which were in good agreement with experimental results. Lanthanum additions promoted the generation and collision of La-rich inclusions and inhibited the precipitation of MnS inclusions in the solid steel with the number density and area fraction of MnS inclusions decreased obviously. An appropriate amount of lanthanum was beneficial to improve the distribution of sulfide and promoted the formation of type I sulfide in the high sulfur steel. |
Proceedings Inclusion? |
Planned: |
Keywords |
Other, Other, Other |