INVESTIGADORES
MASSONE Juan Miguel
artículos
Título:
Effect of microsegregation on carbide-free bainitic transformation in a high-silicon cast steel
Autor/es:
TENAGLIA, NICOLÁS E.; MASSONE, JUAN M.; BOERI, ROBERTO E.; SPEER, JOHN G.
Revista:
MATERIALS SCIENCE AND TECHNOLOGY
Editorial:
MANEY PUBLISHING
Referencias:
Año: 2020 p. 1 - 9
ISSN:
0267-0836
Resumen:
ABSTRACTA high silicon cast steel was studied in the as-cast condition in order to characterise its solidification macrostructure and microsegregation. The steel, poured into 32 mm-keel-block-shapedmoulds, has a coarse solidification structure and marked microsegregation, containing lowalloyed areas with a total alloy content (Cr + Mn + Si) of 2.3 wt-% and high-alloyed zones of5.3 wt-%. The bainitic transformation behaviour at 300°C was studied at different austemperingtimes. The bainitic reaction occurs at different rates within the specimen volume, because of itschemical heterogeneity. An austempering heat treatment leads to an inhomogeneous carbidefree bainitic microstructure with different phase amounts, morphologies and sizes. The heterogeneous distribution of sizes and chemical compositions of retained austenite is speculated tobenefit mechanical properties.
