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ASM Handbook

Cast Iron Science and Technology

Edited by
Doru M. Stefanescu
Doru M. Stefanescu
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ASM International
Volume
1A
ISBN electronic:
978-1-62708-179-5
Publication date:
2017
Book Chapter

Heat Treatment of Malleable Irons

By
J.R. Keough
J.R. Keough
Editing author
Applied Process Inc.
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K.L. Hayrynen
K.L. Hayrynen
Editing author
Applied Process Inc.
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Published:
2017
Page range:
270 - 274
Publication history
August 28, 2017

Abstract

Malleable iron is a type of cast iron that has most of its carbon in the form of irregularly shaped graphite nodules instead of flakes, as in gray iron, or small graphite spherulites, as in ductile iron. This article discusses the production of malleable iron based on the metallurgical criteria: to produce solidified white iron throughout the section thickness; and to produce the desired graphite distribution (nodule count) upon annealing. It describes the induction heating and quenching or flame heating and quenching for surface hardening of fully pearlitic malleable iron. Laser and electron beam techniques also have been used for hardening selected areas on the surface of pearlitic and ferritic malleable iron castings that are free from decarburization.

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J.R. Keough, K.L. Hayrynen, 2017. "Heat Treatment of Malleable Irons", Cast Iron Science and Technology, Doru M. Stefanescu

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