| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Microstructural Evolution and Material Properties Due to Manufacturing Processes: A Symposium in Honor of Anthony Rollett
|
| Presentation Title |
Enhancing the Microstructure and Mechanical Properties of API 5LB Pipeline Steel Using Deep Cryogenic Treatment |
| Author(s) |
Yifan Li, Songyuan Ai, Rundong Zhang, Lihua Wan, Mujun Long, Danbin Jia, Dengfu Chen |
| On-Site Speaker (Planned) |
Yifan Li |
| Abstract Scope |
Further improving the comprehensive mechanical properties of pipeline steel plays an important role in the construction of pipeline projects, especially under the development trend of large-diameter and high-pressure transmission. In this study, API 5LB pipeline steel has been deep cryogenic treatment (DCT) after traditional hot-rolling process, and the effect of treatment time on mechanical properties and microstructure were investigated by tensile test and microstructure inspection. The results show that the DCT can comprehensively improve the mechanical properties, especially the plasticity. After DCT for 12h, the yield strength, tensile strength and total elongation were increased by 5%, 5% and 20%, respectively. The grain size was gradually refined with the increase of treatment time, which the average grain size was reduced from 15 μm to 10 μm, with a reduction of 33.33% after DCT for 12h. The grain refinement after DCT is the main reason for the improvement of mechanical properties. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Mechanical Properties, Process Technology |