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Wear performance of TiC/Fe cermet electrical discharge coatings

Algodi, Samer J.; Murray, James W.; Brown, Paul D.; Clare, Adam T.

Authors

Samer J. Algodi

James W. Murray

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PAUL BROWN PAUL.BROWN@NOTTINGHAM.AC.UK
Professor of Materials Characterisation

ADAM CLARE adam.clare@nottingham.ac.uk
Professor of Manufacturing Engineering



Abstract

The tribological behaviours of TiC-based cermet coatings, prepared by electrical discharge coating (EDC) using a semi-sintered TiC tool electrode, have been investigated. The as-deposited coatings exhibited complex microstructures, comprising TiC grains within an Fe matrix, on both high speed steel (HSS) and 304 stainless steel (304-SS) substrates. The wear resistance of TiC/Fe cermet coatings, on both substrate types, increased dramatically (one and two orders of magnitude improvement in specific wear rate), compared to as-polished substrates. Further, EDC cermet coatings on HSS were typically 2–4 times more wear resistant, depending on loading, than those deposited on 304-SS, with wear performance reflecting the composite nature of the coating coupled with the mechanical properties of the substrate. Laser surface treatments used to improve surface integrity of the as-deposited coatings, through elimination of cracks and porosity characteristic of ED coating, acted to increase wear rates for all samples, with the exception of coatings on HSS under conditions of high loading. The general increase of wear rate was attributed to a significant reduction in the proportion of TiC within the ED coatings, after laser treatment, combined with an increase in grain size; whilst improvements to the wear performance of laser treated, cermet coated HSS, under high loading, was attributed to the avoidance of an abrasive wear mechanism.

Citation

Algodi, S. J., Murray, J. W., Brown, P. D., & Clare, A. T. (2018). Wear performance of TiC/Fe cermet electrical discharge coatings. Wear, 402-403, https://doi.org/10.1016/j.wear.2018.02.007

Journal Article Type Article
Acceptance Date Feb 7, 2018
Online Publication Date Feb 8, 2018
Publication Date May 15, 2018
Deposit Date Mar 12, 2018
Publicly Available Date Mar 29, 2024
Journal Wear
Print ISSN 0043-1648
Electronic ISSN 0043-1648
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 402-403
DOI https://doi.org/10.1016/j.wear.2018.02.007
Keywords Electrical discharge coating ; EDC ; EDM ; TiC/Fe cermet ; Tribology ; Wear
Public URL https://nottingham-repository.worktribe.com/output/932627
Publisher URL https://www.sciencedirect.com/science/article/pii/S0043164817314096?via%3Dihub

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