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Effect of Copper Content and Heat Treatment Schedules on Mechanical Properties, Cold Resistance, and Microstructural Constituent Morphology in Precipitation-Hardened Steel

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Metallurgist Aims and scope

The effect of copper content in the range of 0.8–1.4% on mechanical properties and cold resistance of low-alloy precipitation-hardening steel for fittings after heat treatment is investigated. It is established that steel containing 1.4% copper provides the maximum level of strength properties after normalizing and tempering and in this case the steel has an acceptable level of impact strength and cold resistance. The microstructure of steel with 1.4% Cu is investigated by scanning and transmission electron microscopy after tempering at different temperatures. Structure formation in steel with a high copper content during heat treatment by regimes simulating fitting preparation by hot stamping with subsequent tempering, including changes occurring with a secondary structural component, carbonitride particles, and copper particle strengthening precipitates, is studied in detail.

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Authors and Affiliations

  1. I. P. Bardin Central Research Institute for Ferrous Metallurgy, Moscow, Russia

    M. Yu. Matrosov, A. A. Kholodnyi, D. L. D’yakonov & P. G. Martinov

  2. FGBUN Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow, Russia

    A. S. Tuftyaev & M. V. Il’ichev

Authors
  1. M. Yu. Matrosov
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  2. A. A. Kholodnyi
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  3. D. L. D’yakonov
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  4. P. G. Martinov
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  5. A. S. Tuftyaev
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  6. M. V. Il’ichev
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Correspondence to M. Yu. Matrosov.

Additional information

Translated from Metallurg, Vol. 65, No. 12, pp. 32–38, December, 2021. Russian DOI: https://doi.org/10.52351/00260827_2021_12_32.

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Matrosov, M.Y., Kholodnyi, A.A., D’yakonov, D.L. et al. Effect of Copper Content and Heat Treatment Schedules on Mechanical Properties, Cold Resistance, and Microstructural Constituent Morphology in Precipitation-Hardened Steel. Metallurgist 65, 1381–1390 (2022). https://doi.org/10.1007/s11015-022-01285-3

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  • DOI: https://doi.org/10.1007/s11015-022-01285-3

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