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Effects of Trace Elements on the Formation of Spheroidal Graphite in Ductile Iron

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Abstract:

Spheroidal graphite was obtained by direct quenching iron melt atfter spheroidization and inoculation procedures. The morphology and the effects of trace elements on the formation of spheroidal graphite were investigated by scanning electron microscopy (SEM), and energy-dispersive X-ray (EDX) spectroscopy. Results indicate that all the graphite fixed by quenching, is nearly spheroidal with a diameter of approximately 20μm. In addition, the SEM image of graphite morphology confirms the screwed growth model of spheroidal graphite. The linear distribution of trace elements shows that the nucleus of spheroidal graphite consists of antimony, cerium, magnesium and sulfur element. Meanwhile, trace elements, such as antimony, cerium and magnesium, enrich around graphite nodule, which facilitates the formation of spheroidal graphite.

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Advanced Materials, CEAM 2011 View Preview

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Periodical:

Advanced Materials Research (Volumes 239-242)

Pages:

1239-1242

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.239-242.1239

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Online since:

May 2011

Authors:

Xiao Gang Diao, Zhi Liang Ning, Fu Yang Cao, Shan Zhi Ren, Jian Fei Sun

Keywords:

Ductile Iron, Graphite Morphology, Trace Elements

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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