Vorträge und Posterpräsentationen (ohne Tagungsband-Eintrag):
R. Calderon, C. Gierl-Mayer, H. Danninger:
"Master Alloys for introducing Alloying Elements in Low-Alloy steels: New Concepts and Possibilities";
Vortrag: JSPM International Conference on Powder and Powder Metallurgy ~ 60th Anniversary ~ (JSPMIC2017),
Kyoto, Japan (eingeladen);
06.11.2017
- 09.11.2017.
Kurzfassung englisch:
Combining all alloying elements in the form of a masteralloy (MA) powder gives the possibility to protect oxygen-sensitive elements against oxidation, and to promote the formation of a liquid phase that enhances sintering. As compared to the prealloyed approach, the MA route has lower impact in compressibility, and provides more flexibility in the selection of the final composition. Already at the 70´s, researchers seeking the introduction of tricky alloying elements, or the formation of liquid phases, made important advances in the master alloy approach. But it was in the late 90´s when two parallel developments boosted the research on this field: the implementation of inert gas atomization as a production method, and the use of computer software tools to systematically search low melting point compositions. During the last 10 years the master alloy concept has evolved significantly and nowadays computer software tools can be used not only to search for low melting point compositions, but also to tailor the properties of the liquid and its interaction with the solid particles during sintering. Besides, the study of the chemical interactions between MA, Fe base powder, graphite and atmosphere has provided key knowledge about the critical aspects for sintering steels containing master alloys. The possibility to tailor the properties of sintered steels through the use of specific MA compositions, together with the development of novel atomizing methods to produce MA powders with favorable characteristics at a very reasonable price may, in the near future, position the MA approach as a very interesting alternative to conventional alloying methods
Schlagworte:
alloying routes, master alloys, sintered steels, oxidation/reduction reactions, liquid phases
Erstellt aus der Publikationsdatenbank der Technischen Universität Wien.