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Laser surface alloying of a chromium-molybdenum steel: mechanical behaviour improvement by melting of boron coatings

Published online by Cambridge University Press:  25 October 2002

F. Marasescu ,
F. Hlawka  and
A. Cornet
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Abstract

Surface laser alloying can improve mechanical behaviour, particularly hardness, wear or corrosion resistance. Here, different boron coatings - boron carbides, boron, boron-iron or zirconia-boron mixtures - on a chromium-molybdenum steel are laser melted; the laser tracks show rather homogeneous microstructures; hardness increases with boron content and can reach about 1200 HV over a one millimeter depth with 5.7% boron, without the formation of the brittle phase FeB.

Type
Research Article
Information
Metallurgical Research & Technology , Volume 99 , Issue 2: Science et Génie des Matériaux , February 2002 , pp. 135 - 144
Copyright
© La Revue de Métallurgie, 2002

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