| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
C-11: Characteristics of Primary Carbide and Its Evolution during Hot Rolling in High-carbon Chromium Bearing Steel |
| Author(s) |
Zhuang Zhang, Hao Geng, Pu Wang, Peng Lan, Haiyan Tang, Jiaquan Zhang |
| On-Site Speaker (Planned) |
Zhuang Zhang |
| Abstract Scope |
Clarifying the characteristics of primary carbide in high-carbon chromium bearing steel and its evolution behavior during hot rolling is crucial to control the contact fatigue failure caused by it. The morphology, distribution, solute segregation, and the type of carbide were investigated via dendrite etching, scanning electron microscopy, and X-ray diffraction. Furthermore, the melting process of primary carbide and its evolution during rolling were studied by high-temperature confocal laser scanning microscope and CC-DR simulator, respectively. The results show that primary carbide exists only in the central equiaxed crystal zone of the continuously cast bloom, and appears as Cr-rich white eutectic structure between dendrites. The type of carbide is M3C cementite, and the decomposition and melting temperatures are 1080 ℃ and 1160 ℃, respectively. Rolling below the melting temperature may cause uncoordinated deformation of carbides and matrix, then stress concentration occurs in the contact area and eventually lead to cracks. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Iron and Steel, Phase Transformations |