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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 Ductile Iron

By
K. Hayrynen
K. Hayrynen
Revising author
Applied Process, Inc.
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Published:
2017
Page range:
256 - 269
Publication history
August 28, 2017

Abstract

Ductile cast irons are heat treated primarily to create matrix microstructures and associated mechanical properties not readily obtained in the as-cast condition. This article discusses the most important heat treatments of ductile irons and their purposes. International standards of ductile iron provided by ASTM International, the International Organization for Standardization (ISO), and SAE International are presented in a table. The article explains basic structural differences between the ferritic, pearlitic, martensitic, and ausferritic classes. It presents recommended practices for annealing ductile iron castings for different alloy contents and for castings with and without eutectic carbides. The article discusses the induction surface hardening and remelt hardening of ductile iron. It concludes with information on the effect of heat treatment on fatigue strength of ductile iron.

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K. Hayrynen, 2017. "Heat Treatment of Ductile Iron", Cast Iron Science and Technology, Doru M. Stefanescu

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