| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Defects and Properties of Cast Metals
|
| Presentation Title |
C-7: Effect of RE Content on TiN Inclusions Formation in P110-grade Casing Steel |
| Author(s) |
Jinwen Liu, Haiyan Tang, Gen Li, Kaimin Wang, Yuhang Wang, Jiaquan Zhang |
| On-Site Speaker (Planned) |
Jinwen Liu |
| Abstract Scope |
Hydrogen resistance and sulfide stress corrosion resistance of casing steels are severely impaired by large TiN inclusions. Rare earth elements have the potential to modify the properties of non-metallic inclusions in steels.The effect of RE content on the formation of TiN inclusions in P110 grade casing steel has been investigated on the basis of industrial trials.The results show that the main types of inclusions formed in the casing steel without RE addition are pure TiN and composite Ca-(S)-Al-(Mg)-O+TiN, while pure TiN and composite RE-P-As+TiN or composite RE-O(-S-Ca)+TiN after RE addition. The number of TiN inclusions in the rolled products decreases with increasing RE content (0, 0.0160%, 0.0197%), but the average size of TiN inclusions becomes smaller and then larger. Thermodynamic calculations show that increasing the RE content in casing steel reduces the precipitation temperature of TiN inclusions, which inhibits the precipitation of TiN inclusions. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Solidification, Other |