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Malleable iron
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Malleable iron is cast as white iron, the structure being a metastable carbide in a pearlitic matrix. Through an annealing heat treatment, the brittle structure as first cast is transformed into the malleable form. Carbon agglomerates into small roughly spherical aggregates of graphite, leaving a matrix of ferrite or pearlite according to the exact heat treatment used.
Three basic types of malleable iron are recognized within the casting industry: blackheart, whiteheart, and pearlitic.[1]
- ^ Brown, Robert R. (1999). Foseco Ferrous Foundryman's Handbook. Butterworth-Heinemann. ISBN 0-7506-4284-X.
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