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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

Subcritical Annealing and Normalizing

By
Roger N. Wright
Roger N. Wright
Rensselaer Polytechnic Institute
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Published:
2013
Page range:
305 - 308
Publication history
July 23, 2013

Abstract

This article describes the metallurgy and process specifics of subcritical annealing, which involves heating below the lower critical temperature such that austenite does not form during subcritical annealing. It provides information on the nominal subcritical annealing temperatures of plain carbon, low-alloy and high-alloy steels and temperature-time relations of subcritical annealing. Practical implications for induction annealing and induction normalizing are included. The article concludes by describing induction softening, which softens the threaded area on carburized components such as hypoid pinion gears, to prevent the occurrence of delayed fractures from occurring.

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Roger N. Wright, 2013. "Subcritical Annealing and Normalizing", Steel Heat Treating Fundamentals and Processes, Jon L. Dossett, George E. Totten

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