Speaker
Description
Tempering of nanostructured bainite has proven to be an excellent choice for components where requirements for enhance service properties at elevated temperatures are needed. Supporting secondary hardening by alloying Mo and V enables the possibilities to combine both effects: nanostructured matrix and secondary precipitation. Detailed characterization by dilatometry and phase analysis using XRD and in-situ XRD reveals and identifies the different tempering events occurring on these specially designed alloys, allowing for the identification of suitable temperatures regimes, where the nanostructured character of the ferritic matrix is maintained and V and/or Mo precipitates takes place, leading to better service properties at elevated temperatures.
This work will present on overview of the most relevant results obtained in a devoted Research Fund for Coal and Steel (RFCS) project, STEELSECO, where this concept has been explored and exploited. Covering from the steel and process design, the general secondary tempering behavior and a detailed discussion on the attained mechanical properties, with especial emphasis in fatigue properties (static and cyclic loading conditions). An attempt in establishing the correlation between the mentioned properties and the austenite stability will be also presented.
This research is funded by the Research Fund for Coal and Steel (RFCS) project, STEELSECO.
| Speaker Country | Germany |
|---|