| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Energy Technologies and CO2 Management
|
| Presentation Title |
High Temperature Properties in Ferritic Heat Resistant Steels with Intermetallic Precipitates for High Efficient Heat Recovery Systems |
| Author(s) |
Akio Mitani, Mari Miyoseta, Yukio Tachi |
| On-Site Speaker (Planned) |
Yukio Tachi |
| Abstract Scope |
Suppression of energy consumption and CO2 emission have been attracting attention on a worldwide basis. A recuperator is one of the representatives of heat exchangers contributing to these challenges through heat recovery, and is broadly operated in various industries. Although increasing service temperature in requperator is a straightforward way to improve the heat recovery efficiency, more durable materials at elevated temperature are required for heat exchanger tubes. Compared with conventional heat resistant steels such as EN1.4762, the developed high chromium ferritic steel, which is characterized by the addition of titanium and niobium besides silicon and aluminum, achieved excellent creep life at 850 degree Celsius through dispersed intergranular and intragranular intermetallic precipitates. The intermetallic compounds were long-term stable and didn’t degrade corrosion resistance at the desired service temperature. The tubes using the developed material enable to increase maximum service temperature in recuperator and help realize outstanding heat recovery efficiency. |
| Proceedings Inclusion? |
Planned: |