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The Relationship between the Microstructure and Abrasive Resistance of a Hardfacing Alloy in the Fe-Cr-C-Nb-V System

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Abstract

The relationship between abrasive wear resistance and microstructure of a hardfacing alloy based on the Fe-Cr-C-Nb-V system was investigated. This material was developed for cladding, by an open arc welding technique, of components subjected to severe abrasive wear. The work undertaken included the solidification study, microstructural characterization, and abrasion testing. Microstructural examinations of hardfaced layer showed that the microstructure of the alloy consisted of a large volume fraction of primary niobium carbides randomly dispersed in a metastable austenitic matrix containing fine M3C carbides and “islands” of eutectic mixture of γ/M7C3. Energy dispersive X-ray analysis results showed that V preferentially partitioned into the NbC and M3C phases. In comparison with the conventional high carbon/high chromium hardfacing alloy with higher hardness, a Fe-Cr-C-Nb-V hardfacing alloy exhibited improved abrasive wear resistance and a microstructure with higher toughness.

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Acknowledgments

The authors are grateful to Welding Alloys Ltd. (UK) for providing welding consumables and equipment. The authors also thank Professor H.K.D.H Bhadeshia for the provision of MTDATA program and the Brazilian Organization, CNPq.

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Author notes

  1. E.O. Correa (Researcher)

    Present address: Universidade Federal de Itajubá, Minas Gerais, Brazil

Authors and Affiliations

  1. Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, United Kingdom

    E.O. Correa (Researcher) & R.V. Kumar (Senior Lecturer)

  2. Universidade Federal de São Carlos, São Paulo, Brazil

    N.G. Alcântara (Professor)

  3. Welding Alloys Ltd., Fowlmere, Royston, Herts, United Kingdom

    D.G. Tecco (Director)

Authors
  1. E.O. Correa
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  2. N.G. Alcântara
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  3. D.G. Tecco
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  4. R.V. Kumar
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Corresponding author

Correspondence to R.V. Kumar.

Additional information

Manuscript submitted May 17, 2006.

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Correa, E., Alcântara, N., Tecco, D. et al. The Relationship between the Microstructure and Abrasive Resistance of a Hardfacing Alloy in the Fe-Cr-C-Nb-V System. Metall Mater Trans A 38, 1671–1680 (2007). https://doi.org/10.1007/s11661-007-9220-8

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  • DOI: https://doi.org/10.1007/s11661-007-9220-8

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