Rev. Met. Paris
Volume 99, Number 2, February 2002Science et Génie des Matériaux
|Page(s)||135 - 144|
|Published online||25 October 2002|
Laser surface alloying of a chromium-molybdenum steel: mechanical behaviour improvement by melting of boron coatings
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.
© La Revue de Métallurgie, 2002
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