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ASM Handbook

Steel Heat Treating Fundamentals and Processes

Edited by
Jon L. Dossett
Jon L. Dossett
Consultant
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George E. Totten
George E. Totten
Portland State University
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ASM International
Volume
4A
ISBN electronic:
978-1-62708-165-8
Publication date:
2013
Book Chapter

Annealing of Steel[1]

By
Satyam S. Sahay
Satyam S. Sahay
Revising author
John Deere Asia Technology Innovation Center
,
Pune
,
India
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Published:
2013
Page range:
289 - 304
Publication history
July 18, 2013

Abstract

Steels may be annealed to facilitate cold working or machining, to improve mechanical or electrical properties, or to promote dimensional stability. This article, using iron-carbon phase diagram, describes the types of annealing processes, namely, subcritical annealing, intercritical annealing, supercritical or full annealing, and process annealing. Spheroidizing is performed for improving the cold formability of steels. The article provides guidelines for annealing and tabulates the critical temperature values for selected carbon and low-alloy steels and recommended temperatures and time cycles for annealing of alloy steels and carbon steel forgings. Different combinations of annealed microstructure and hardness are significant in terms of machinability. Furnaces for annealing are of two basic types, batch furnaces and continuous furnaces. The article concludes with a description of the annealing processes for steel sheets and strips, forgings, bars, rods, wires, and plates.

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Satyam S. Sahay, 2013. "Annealing of Steel", Steel Heat Treating Fundamentals and Processes, Jon L. Dossett, George E. Totten

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