About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
12th International Symposium on High Temperature Metallurgical Processing
|
Presentation Title |
Effect of Austenitizing and Cooling Process on Microstructure Transformation of Low-carbon Bainite Steel |
Author(s) |
Zhou XiaoQing, Wang Hongpo |
On-Site Speaker (Planned) |
Zhou XiaoQing |
Abstract Scope |
Microstructure inheritance is an essential factor accounting for the significant differences in the mechanical properties of low-carbon bainite steel plates in the thickness direction. Effects of the initial solidification structures of the surface layer, 1/4 thickness, and 1/2 thickness of a 300 mm thick low-carbon bainite steel slab on the austenite grain size were investigated by thermodynamic and kinetic calculations, heat treatment experiments, and microscopic characterization methods. The results indicate that the austenite grain size increases significantly with the increasing heating temperature. They show a nonlinear relationship, and the former has a significant inflection point. When the heating temperature exceeds a critical value, the three initial solidification structures grow abnormally during heating. Their inflection point temperatures are also significantly different, jointly determined by the initial solidification structure and the content of strong carbonitride forming elements. |
Proceedings Inclusion? |
Planned: |
Keywords |
Iron and Steel, High-Temperature Materials, |