Paper Titles
Oxygen State Forms in Cast Iron and their Effect on Graphite Crystallization
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On the Theories of Graphite Formation in Iron
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Microstructure Investigation of Small-Section Nodular Iron Castings with Chunky Graphite
p.52
Influence of Primary Austenite on the Nucleation of Eutectic Cells
p.61
Growth of Eutectic Austenite in Free Graphite Cast Irons
p.67
Effect of Yttrium-Containing Nodulizer on the Microstructure Formation and Mechanical Properties of Heavy Section Ductile Iron Castings
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Microstructure and Properties of Cast Iron with Semi-Solid Process Using Cooling Plate Technique
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The Effect of Semi-Solid Parameters on the Microstructure and Hardness of High Chromium Cast Irons
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Effects of Iron Powder Addition on the Solidification Behaviour of Hypereutectic Grey Cast Iron
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Growth of Eutectic Austenite in Free Graphite Cast Irons

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Abstract:

The present work investigates the growth of the eutectic austenite of hypereutectic free graphite cast irons of different graphite morphology. The study was based on the analysis of several samples obtained from a highly hypereutectic cast iron melt. A hypereutectic melt was used in order to ensure the absence of proeutectic austenite. With the aim of obtaining samples of different graphite morphology but nearly identical chemical composition, the melt was nodularized by using a standard procedure, and different samples were cast after various fading periods. Through this procedure, spheroidal, vermicular and flake graphite samples were obtained The results show that the eutectic austenite grows dendritically in all samples investigated. Nevertheless, significant differences were found in the size of the solidification units (grains) and in the microsegregation patterns as the graphite morphology changes from spheroidal to flake.

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Periodical:

Key Engineering Materials (Volume 457)

Pages:

67-72

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.457.67

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Online since:

December 2010

Authors:

Graciela Leonor Rivera, Roberto Enrique Boeri, Jorge Antonio Sikora

Keywords:

Austenite Growth, Free Graphite Cast Iron, Macrostructure

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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