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ASM Handbook

Steel Heat Treating Technologies

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
4B
ISBN electronic:
978-1-62708-166-5
Publication date:
2014
Book Chapter

Furnace Atmospheres for Heat Treating[1]

By
Ralph Poor
Ralph Poor
Surface Combustion
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Steve Ruoff
Steve Ruoff
Air Products and Chemicals, Inc.
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Thomas Philips
Thomas Philips
Air Products and Chemicals, Inc.
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Published:
2014
Page range:
108 - 134
Publication history
August 31, 2014

Abstract

This article provides a detailed discussion on the types of furnace atmospheres required for heat treating. These include generated exothermic-based atmospheres, generated endothermic-based atmospheres, generated exothermic-endothermic-based atmospheres, generated dissociated-ammonia-based atmospheres, industrial gas nitrogen-base atmospheres, argon atmospheres, and hydrogen atmospheres. Atmospheres for backfilling, partial pressure operation, and quenching in vacuum are also discussed. Furnace atmospheres constitute four major groups of safety hazards in heat treating: fire, explosion, toxicity, and asphyxiation. The article reviews the fundamentals of principal gases and vapors. It describes how the evaluation of the atmospheric requirements of heat treating furnaces is influenced by factors such as cost of operation and capital investment.

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Ralph Poor, Steve Ruoff, Thomas Philips, 2014. "Furnace Atmospheres for Heat Treating", Steel Heat Treating Technologies, Jon L. Dossett, George E. Totten

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