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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 Controls

By
Jason Walls
Jason Walls
United Process Controls
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Frank Pietracupa
Frank Pietracupa
United Process Controls
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Eric Boltz
Eric Boltz
United Process Controls
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Janusz Szymborski
Janusz Szymborski
Nitrex Metal Inc.
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Published:
2014
Page range:
170 - 181
Publication history
August 31, 2014

Abstract

Heat treating furnaces require different control systems and integration for achieving optimum technical results and enabling safe operation. This article focuses on atmosphere furnaces, with some coverage on controls for vacuum furnaces. Heat treating operations require reliable monitoring and control of motion and position of various mechanical components with the help of mechanical limit switches, proximity sensors, and distance- and position-measuring devices. Using inputs from both flow meters and sensors, such as thermocouples and oxygen sensors, flow measurement control systems must be able to adjust the flow of gases for process optimization. The operator interface of a furnace-control system displays critical information such as the furnace temperature, atmosphere status, alarms, electronic chart recorders, recipe, and maintenance. A supervisory control and data-acquisition (SCADA) system is used to monitor, collect, and store data from multiple pieces of equipment.

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Jason Walls, Frank Pietracupa, Eric Boltz, Janusz Szymborski, 2014. "Furnace Controls", Steel Heat Treating Technologies, Jon L. Dossett, George E. Totten

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