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Effect of Minor Additives on First Stage Graphitisation in White Cast Iron

Published online by Cambridge University Press:  21 February 2011

P. L. Roy ,
A. K. Chakrabart  and
P. Banerjee
P. L. Roy
Affiliation:
Regional Institute of Technology, Jamshedpur, India
A. K. Chakrabart
Affiliation:
Indian Institute of Technology, Kharagpur, India
P. Banerjee
Affiliation:
Indian Institute of Technology, Kharagpur, India
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Abstract

Minor additions (0.05-0.2 wt.%) of sodium chloride, hexachloroethane and elemental sulphur to commercial white iron melts have been found to enhance the kinetics of first stage graphitisation during subsequent annealing of white iron samples. The optimum dose of sodium chloride and hexachloroethane addition is around 0.1%. Yield strength and ductility of annealed test bars treated with NaCl or C2Cl6 compare favourably with those of untreated test bars. Sulphur treatment causes slight deterioration in mechanical properties. Fully grown nodules in both treated and untreated samples appear porous under SEM. Possible mechanisms of acceleration of graphitisation in the treated samples have been suggested.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 34: Symposium – Physical Metallurgy of Cast Iron , 1984 , 287
Copyright
Copyright © Materials Research Society 1985

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References

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