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The chemistry and structure of wear-resistant, iron-base hardfacing alloys

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Abstract

The chemistry and microstructure of iron-base alloys resistant to galling wear were determined by using optical microscopy and scanning electron microscopy (SEM). Castings and weld overlays, deposited by the gas tungsten arc and plasma arc welding (GTAW and PAW, respectively) processes, were evaluated. The microstructure typically consisted of a primary austenitic matrix, eutectic carbides (M7C3 type), and noneutectic carbides. Processing techniques that resulted in high cooling rates yielded microstructures with finer features, less complete partitioning of alloying elements to the carbides, and improved resistance to galling wear. Carbon and manganese appeared to improve resistance to galling wear. Nickel was detrimental to galling wear resistance.

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Authors and Affiliations

  1. Oak Ridge National Laboratory, 37831, Oak Ridge, TN

    E. K. Ohriner

  2. Michigan Advanced Materials, 48108, Ann Arbor, MI

    T. Wada

  3. Climax Research Services, Farmington Hills, 48331, MI

    E. P. Whelan

  4. Electric Power Research Institute (EPRI), 94303, Palo Alto, CA

    H. Ocken

Authors
  1. E. K. Ohriner
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  2. T. Wada
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  3. E. P. Whelan
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  4. H. Ocken
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Formerly with AMAX Materials Research Center

Formerly with AMAX Materials Research Center

Formerly with AMAX Materials Research Center

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Ohriner, E.K., Wada, T., Whelan, E.P. et al. The chemistry and structure of wear-resistant, iron-base hardfacing alloys. Metall Trans A 22, 983–991 (1991). https://doi.org/10.1007/BF02661091

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  • DOI: https://doi.org/10.1007/BF02661091

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