About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
12th International Symposium on High Temperature Metallurgical Processing
|
Presentation Title |
Effect of Slag Basicity on Non-metallic Inclusions in a Heavy Rail Steels |
Author(s) |
Nan Liu, Lifeng Zhang, Yanping Chu, Ying Ren |
On-Site Speaker (Planned) |
Lifeng Zhang |
Abstract Scope |
Experiments and thermodynamic calculations were performed to investigate the effect of slag basicity (CaO/SiO2) on non-metallic inclusions in heavy rail steels. With the increased of slag basicity from the 1.7 to 2.3, the composition of inclusions changed from the SiO2-CaO to Al2O3-MgO-SiO2-CaO. During the rolling process, the full liquid inclusions was rolled to the linear shape inclusions. It was proposed that the target of inclusions was the partial liquid inclusions instead of the full liquid inclusions to avoid the formation of the linear shape inclusions. Moreover, the relationship between the composition of the Al2O3-MgO-SiO2-CaO slag and the composition of inclusions was calculated using FactSage thermodynamic software. The content of Al2O3 in inclusions increased from less than 10 % to above 30 % with a higher slag basicity. The Al2O3 content in slag should be lowered as low as possible to reduce the Al2O3 content in inclusions in heavy rail steels. |
Proceedings Inclusion? |
Planned: |
Keywords |
Other, Other, Other |