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Microstructure of a quenched and tempered Cu-bearing high-strength low-alloy steel

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Abstract

The grain structure, inclusion content, and precipitate types were characterized for six heat treatments of a copper-bearing HSLA steel. A higher austenitizing temperature combined with water-quenching resulted in an acicular ferrite microstructure, while lower temperatures produced equiaxed ferrite or ferrite-pearlite structures. Refinement of equiaxed ferrite was observed in material austenitized at a high enough temperature to dissolve a portion of the carbonitrides, allowing reprecipitation during the austenite-ferrite transformation. Age-hardening precipitated body-centered cubic copper clusters; face-centered cubic copper precipitates were observed in overaged material.

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Authors and Affiliations

  1. Babcock and Wilcox, 44601, Alliance, OH

    M. T. Miglin (Senior Research Engineer)

  2. Department of Metallurgical Engineering, The Ohio State University, 43210, Columbus, OH

    J. P. Hirth (Professor) & W. A. T. Clark (Associate Professor)

  3. Battelle’s Columbus Laboratories, 43201, Columbus, OH

    A. R. Rosenfield (Research Leader)

Authors
  1. M. T. Miglin
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  2. J. P. Hirth
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  3. A. R. Rosenfield
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  4. W. A. T. Clark
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Miglin, M.T., Hirth, J.P., Rosenfield, A.R. et al. Microstructure of a quenched and tempered Cu-bearing high-strength low-alloy steel. Metall Trans A 17, 791–798 (1986). https://doi.org/10.1007/BF02643854

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  • DOI: https://doi.org/10.1007/BF02643854

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