Artículo
Macro and microstructural characterisation of high Si cast steels–Study of microsegregation patterns
Fecha de publicación:
23/11/2016
Editorial:
Maney Publishing
Revista:
International Journal Of Cast Metals Research
ISSN:
1364-0461
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
In this study the as-cast macro and microstructures of medium C – high Si cast steels of three different levels of alloying are characterised. The application of a colour-etching reagent sensitive to Si segregation effectively revealed the solidification macrostructure, showing that the patterns of macrostructure and microsegregation are governed by the initial precipitation
of δ-ferrite dendrites. A study of microsegregation carried out using advanced EDS techniques showed that, for the studied chemical compositions, Si, Mn, Cr, Ni, Mo and Al tend to concentrate at the last liquid to solidify. Accordingly, effective partition coefficients of values below unity were calculated for all alloying elements tested. It was verified that the minimum local Si contents measured on the steels investigated were greater than 1.7%, value above the minimum value (1.5%) necessary to obtain carbide-free bainite after austempering.
Palabras clave:
Cast Steels
,
High Silicon
,
Microsegregation
,
Solidification
,
Peritectic
Archivos asociados
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Identificadores
Colecciones
Articulos(INTEMA)
Articulos de INST.DE INV.EN CIENCIA Y TECNOL.MATERIALES (I)
Articulos de INST.DE INV.EN CIENCIA Y TECNOL.MATERIALES (I)
Citación
Tenaglia, Nicolás Emanuel; Boeri, Roberto Enrique; Basso, Alejandro Daniel; Massone, Juan Miguel; Macro and microstructural characterisation of high Si cast steels–Study of microsegregation patterns; Maney Publishing; International Journal Of Cast Metals Research; 30; 2; 23-11-2016; 103-111
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