| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Study on Banded Segregation of High-Strength Hot-Rolled Grade Steel and the "Void" Defect in Casting Slabs |
| Author(s) |
Feifei Yang, zhanpeng Yin, Yanzhao Luo, xin Li, Guobiao Di |
| On-Site Speaker (Planned) |
Feifei Yang |
| Abstract Scope |
Morphology, spatial distribution, and elemental distribution of both "void" defects in slabs and banded structure defects in hot-rolled coils were characterized. The results suggest that "void" defects appear at the center of the slab thickness, with the most severe instances at the 1/4 width position, resembling the distribution of coarse banded structures in hot-rolled coils. The significant segregation of C, Mn, and Nb appears in both "void" and coarse banded structures. A clear correlation between the two phenomena is indicated by the statistical analysis of industrial production. The banded structure can be indirectly assessed through the observation of the size and quantity of voids in slabs, which can be combined with metallographic statistics for a more accurate evaluation of product quality. Furthermore, banded structures can be diminished by addressing the ‘void’ defects in slabs. In summary, this paper presents a novel method to evaluate and control the banded structures. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Solidification, Phase Transformations |