RAPID SOLIDIFICATION OF CAST IRON by Elizabeth. P. Elenwa, Scientific Research Journal (Scirj), Volume VII, Issue II, February 2019 Edition

Scirj Volume VII, Issue II, February 2019 Edition
ISSN: 2201-2796

RAPID SOLIDIFICATION OF CAST IRON

Elizabeth. P. Elenwa

Abstract: The grey cast iron wasrapidly solidified by drop tube technique and different sample sizes obtained. The calculation results of the cooling rates of the grey cast iron samples shows that the maximum cooling rate obtained is 7280K/s in this experiment. The microstructure of the grey cast iron samples with different sizes were characterized using optical microscopy, scanning electron microscopy and x-ray diffraction analysis. In the microscopic analysis, it was found that lower cooling rates promote graphite formation in grey cast iron. The microstructure of the grey cast iron bar (unetched) shows the most desired morphology and distribution of grey cast iron.The X-ray diffraction analysis shows the main peaks present in the samples and their experimental intensities. Peaks (011) and (101) were present in all the samples with (011) being the most intense peak. The theoretical intensities and the relative ratios of these peaks were estimated and presented in table 1 and 2 of this work. The solidification behaviour in drop tube technique is significantly affected by the size of the droplet which can generally determine the exact level of underccooling. The cooling rate in this process is estimated and their effect on the structural morphology of grey cast iron is discussed.

Reference this Paper: RAPID SOLIDIFICATION OF CAST IRON by Elizabeth. P. Elenwa published at: "Scientific Research Journal (Scirj), Volume VII, Issue II, February 2019 Edition, Page 74-81 ".

Search Terms: Rapid solidification; Drop tube; Grey cast iron; cooling rate; Graphite flakes; Microstructure

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