Steel Heat Treating Fundamentals and Processes
Stop-Off Technologies for Heat Treatment
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...
Eckhard H. Burgdorf, Manfred Behnke, Rainer Braun, Kevin M. Duffy, Stop-Off Technologies for Heat Treatment, Steel Heat Treating Fundamentals and Processes, Vol 4A, ASM Handbook, Edited By Jon L. Dossett, George E. Totten, ASM International, 2013, p 399–404, https://doi.org/10.31399/asm.hb.v04a.a0005784
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