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On the Optimization of Compressibility and Hardenability of Sinter-Hardenable PM Steels

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Abstract

Sinter-hardenable steel powders eliminate the extra steps normally required for heat treating since they allow for direct quenching of components at the end of the sintering cycle with a forced convection cooling unit. The current article presents the results of the effect of the alloying method on the optimization of compressibility and sinter-hardenability of sinter-hardenable PM steels. Water-atomized steel powders were produced. Two successive designs of experiments were used to optimize the chemical composition with prealloyed (nickel, chromium, molybdenum, and manganese) and admixed elements (nickel, chromium, manganese, and copper). Static mechanical properties were also characterized. Results show that among all of the combinations of chemical elements and within the range of concentrations studied, the optimum sinter-hardenable powder had the following prealloyed chemistry: 1.5 wt pct Ni, 1 to 1.25 wt pct Mo, and 0.40 to 0.55 wt pct Cr.

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Acknowledgments

This research was funded by the Auto21-Network of Centers of Excellence, Canada.

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Authors and Affiliations

  1. Centre de Métallurgie du Québec, 3095 Rue Westinghouse, Trois-Rivières, QC, G9A5E1, Canada

    Nicolas Giguère (Research Engineer)

  2. Department of Mining, Metallurgical and Materials Engineering, Université Laval, Room 1728, Adrien-Pouliot Builing, Quebec City, QC, G1V 0A6, Canada

    Carl Blais (Professor)

Authors
  1. Nicolas Giguère
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  2. Carl Blais
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Correspondence to Nicolas Giguère.

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Manuscript submitted March 26, 2012.

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Giguère, N., Blais, C. On the Optimization of Compressibility and Hardenability of Sinter-Hardenable PM Steels. Metall Mater Trans A 44, 4774–4787 (2013). https://doi.org/10.1007/s11661-013-1826-4

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  • DOI: https://doi.org/10.1007/s11661-013-1826-4

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