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Metallurgical and Materials Transactions B
Erschienen in: Metallurgical and Materials Transactions B 5/2017

05.07.2017

Delta-Ferrite Distribution in a Continuous Casting Slab of Fe-Cr-Mn Austenitic Stainless Steel

verfasst von: Chao Chen, Guoguang Cheng

Erschienen in: Metallurgical and Materials Transactions B | Ausgabe 5/2017

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Abstract

The delta-ferrite distribution in a continuous casting slab of Fe-Cr-Mn stainless steel grade (200 series J4) was analyzed. The results showed that the ferrite fraction was less than 3 pct. The “M” type distribution was observed in the thickness direction. For the distribution at the centerline, the maximum ferrite content was found in the triangular zone of the macrostructure. In addition, in this zone, the carbon and sulfur were severely segregated. Furthermore, an equilibrium solidification calculation by Thermo-Calc® software indicates that the solidification mode of the composition in this triangular zone is the same as the solidification mode of the averaged composition, i.e., the FA (ferrite-austenite) mode. None of the nickel-chromium equivalent formulas combined with the Schaeffler-type diagram could predict the ferrite fraction of the Cr-Mn stainless steel grade in a reasonable manner. The authors propose that more attention should be paid to the development of prediction models for the ferrite fraction of stainless steels under continuous casting conditions.
Vorheriger Artikel Study of Reaction Between Slag and Carbonaceous Materials
Nächster Artikel Effect of Holding Time on Surface Films Formed on Molten AZ91D Alloy Protected by Graphite Powder

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Fußnoten
1
The ‘M’ type refers to the delta-ferrite fractions being lower both at the edge and at the center part in the width (thickness) direction, while the fractions are higher at the 1/4 and 3/4 parts (or near those locations) in the width (thickness) direction. In contrast, the ‘A’ type refers to the delta-ferrite fractions being lower at the edge but highest at the center part in the width direction.
 
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Metadaten
Titel
Delta-Ferrite Distribution in a Continuous Casting Slab of Fe-Cr-Mn Austenitic Stainless Steel
verfasst von
Chao Chen
Guoguang Cheng
Publikationsdatum
05.07.2017
Verlag
Springer US
Erschienen in
Metallurgical and Materials Transactions B / Ausgabe 5/2017
Print ISSN: 1073-5615
Elektronische ISSN: 1543-1916
DOI
https://doi.org/10.1007/s11663-017-1026-5

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