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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

Stop-Off Technologies for Heat Treatment

By
Eckhard H. Burgdorf
Eckhard H. Burgdorf
Nüssle GmbH & Co. KG
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Manfred Behnke
Manfred Behnke
Nüssle GmbH & Co. KG
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Rainer Braun
Rainer Braun
Nüssle GmbH & Co. KG
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Kevin M. Duffy
Kevin M. Duffy
The Duffy Company
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Published:
2013
Page range:
399 - 404
Publication history
July 08, 2013

Abstract

A wide variety of stop-off technologies for heat treatment are used to selectively prevent the diffusion of carbon and/or nitrogen during atmosphere carburizing, carbonitriding, vacuum carburizing, and various forms of nitriding. In addition to selective stop-off, technologies are also available for scale prevention in open-fired furnaces. This article describes two stop-off technologies, mechanical masking and copper plating, along with stop-off paints/compounds. Prior to the application of stop-off paints, the part surface of the furnaces should be properly cleaned and dried. The article also describes the usage of stop-off paints in different heat treating processes, namely, carburizing and carbonitriding, deep carburizing, vacuum carburizing, nitriding and nitrocarburizing, and plasma nitriding. The article concludes by reviewing the application methods of stop-off paints: brushing, dipping, dispensing, spraying and stamping.

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Eckhard H. Burgdorf, Manfred Behnke, Rainer Braun, Kevin M. Duffy, 2013. "Stop-Off Technologies for Heat Treatment", Steel Heat Treating Fundamentals and Processes, Jon L. Dossett, George E. Totten

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