Dilution effects in laser cladding of Ni-Cr-B-Si-C hardfacing alloys

I. Hemmati, V. Ocelik*, J. Th. M. De Hosson

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

125 Citaten (Scopus)

Samenvatting

Ni-Cr-B-Si-C coatings were deposited by laser cladding and effects of additional iron (Fe) as a result of dilution from the steel substrate were investigated. It was found that for Fe contents of up to around 25 wt%, chromium borides with higher Fe fractions could form but further increase of the Fe content to over 40 wt% entirely suppressed the precipitation of primary Cr borides. Similarly, the Ni-Si-B eutectics were diminished as dilution increased. By reducing the amount of chromium borides and Ni-Si-B eutectics, excessive iron contents degraded the hardness of Ni-Cr-B-Si-C coatings from 800 to 500 HV. These findings can be used to explain the role of dilution in evolution of microstructure and properties of Ni-Cr-B-Si-C coatings and to tune the processing parameters to obtain the desirable deposits. (C) 2012 Elsevier B.V. All rights reserved.

Originele taal-2English
Pagina's (van-tot)69-72
Aantal pagina's4
TijdschriftMaterials Letters
Volume84
Nummer van het tijdschrift1
DOI's
StatusPublished - 1-okt.-2012

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