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Fe-Cr-C hardfacing alloys for high-temperature applications

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Abstract

The microstructure and phase chemistry of a Fe-34Cr-4.5C wt% hardfacing alloy has been investigated using transmission electron microscopy and microanalytical techniques. The microstructure is found to consist of large primary M7C3. carbides in a eutectic mixture of austenite and more M7C3. The results indicate that the microstructure of the undiluted alloy becomes configurationally frozen at a temperature of about 1150° C during deposition by the manual metal arc welding technique. This allows the metastable austenite phase to contain a large chromium concentration (≈ 16 to 17 wt %), thus imparting good corrosion and oxidation resistance. Experimental data on the partitioning of chromium, manganese and silicon between the carbide phases are discussed in the context of the high-temperature stability of the alloy.

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Authors and Affiliations

  1. ESAB AB, Gothenburg, Sweden

    L. -E. Svensson, B. Gretoft & B. Ulander

  2. Department of Metallurgy and Materials Science, University of Cambridge, Cambridge, UK

    H. K. D. H. Bhadeshia

Authors
  1. L. -E. Svensson
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  2. B. Gretoft
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  3. B. Ulander
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  4. H. K. D. H. Bhadeshia
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Svensson, L.E., Gretoft, B., Ulander, B. et al. Fe-Cr-C hardfacing alloys for high-temperature applications. J Mater Sci 21, 1015–1019 (1986). https://doi.org/10.1007/BF01117388

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  • DOI: https://doi.org/10.1007/BF01117388

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