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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

Thermoreactive Deposition/Diffusion Process for Surface Hardening of Steels

By
Toru (Tohru) Arai
Toru (Tohru) Arai
Consultant
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Published:
2013
Page range:
725 - 740
Publication history
June 01, 2013

Abstract

The thermoreactive deposition and diffusion process is a heat-treatment-based method to form coatings with compacted layers of carbides, nitrides, or carbonitrides, onto some carbon/nitrogen-containing materials, including steels. The amount of active carbide forming elements/nitride forming elements, coating temperatures and time, and thickness of substrates influence the growth rate of coatings. This article lists carbide and nitride coatings that are formed on carbon/nitrogen-containing metallic materials, and describes the coating process and mechanism of coating reagents. It details the growth process and nucleation process of carbide and nitride coatings formed on the metal surface. The article discusses the advantages, disadvantages, and characteristics of the various coating processes, including high-temperature salt bath carbide coating, high-temperature fluidized-bed carbide coating, and low-temperature salt bath nitride coating.

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Toru (Tohru) Arai, 2013. "Thermoreactive Deposition/Diffusion Process for Surface Hardening of Steels", Steel Heat Treating Fundamentals and Processes, Jon L. Dossett, George E. Totten

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