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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

Production of Ductile Iron Castings[1]

By
Douglas White
Douglas White
Revising author
Elkem Materials, Inc.
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Published:
2017
Page range:
603 - 611
Publication history
August 28, 2017

Abstract

Unlike gray iron, which contains graphite flakes, ductile iron has an as-cast structure containing graphite particles in the form of small, rounded, spheroidal nodules in a ductile metallic matrix. This article discusses the raw materials that are used for ductile iron production and outlines the most common and important requirements for controlling the composition of ductile iron. Treatment to produce ductile iron involves the addition of magnesium to change the form of the graphite, followed by or combined with inoculation of a silicon-containing material to ensure a graphitic structure with freedom from carbides. The article describes the methods of magnesium treatment, control of magnesium content, and inoculation. It concludes with a discussion on the metallurgical controls of ductile iron production.

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Douglas White, 2017. "Production of Ductile Iron Castings", Cast Iron Science and Technology, Doru M. Stefanescu

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