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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

Laser Surface Hardening

By
Soundarapandian Santhanakrishnan
Soundarapandian Santhanakrishnan
Indian Institute of Technology Madras
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Narendra B. Dahotre
Narendra B. Dahotre
University of North Texas
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Published:
2013
Page range:
476 - 502
Publication history
July 23, 2013

Abstract

Laser surface hardening is a noncontact process that provides a chemically inert and clean environment as well as flexible integration with operating systems. This article provides a brief discussion on the various conventional surface-modification techniques to enhance the surface and mechanical properties of ferrous and nonferrous alloys. The techniques are physical vapor deposition, chemical vapor deposition, sputtering, ion plating, electroplating, electroless plating, and displacement plating. The article describes five categories of laser surface modification, namely, laser surface heat treatment, laser surface melting such as skin melting or glazing, laser direct metal deposition such as cladding, alloying, and hardfacing, laser physical vapor deposition, and laser shock peening. The article provides detailed information on absorptivity, laser scanning technology, and thermokinetic phase transformations. It also describes the influence of cooling rate on laser heat treatment and the effect of processing parameters on temperature, microstructure, and case depth hardness.

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Soundarapandian Santhanakrishnan, Narendra B. Dahotre, 2013. "Laser Surface Hardening", Steel Heat Treating Fundamentals and Processes, Jon L. Dossett, George E. Totten

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