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Quenched and Partitioned CMnSi Steels Containing 0.3 wt.% and 0.4 wt.% Carbon

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Abstract

The effect of partitioning parameters on mechanical properties and carbon partitioning in quenching and partitioning (Q&P)-treated C-1.5Mn-1.5Si steels was studied using 0.3 wt.% and 0.4 wt.% carbon compositions. Fully austenitized specimens were quenched to a fixed quenching temperature followed by partitioning at 400°C and 450°C for varying times. In most cases, increasing the partitioning temperature decreased UTS and increased TE, and both UTS and TE decreased with increasing partitioning times. Similar ultimate tensile strength levels were obtained for the 0.3C alloy partitioned at 400°C and the 0.4C alloy partitioned at 450°C. Increasing alloy carbon content increased retained austenite fractions. Mössbauer effect spectroscopy results were used to investigate carbon redistribution after Q&P processing in the 0.4C alloy.

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Acknowledgements

This material is based upon work supported by the Department of Energy Advanced Manufacturing Office under Award Number DE-EE0005765. The support of the sponsors of the Advanced Steel Processing and Products Research Center, an industry-university cooperative research center at the Colorado School of Mines is gratefully acknowledged.

Disclaimer

This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.

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Authors and Affiliations

  1. Advanced Steel Processing and Products Research Center, Colorado School of Mines, 1500 Illinois Street, Golden, CO, 80401, USA

    J. Kähkönen, D. T. Pierce, J. G. Speer & E. De Moor

  2. AK Steel Research, 705 Curtis Street, Middletown, OH, 45044, USA

    G. A. Thomas

  3. Los Alamos National Laboratory, Los Alamos, NM, 87545, USA

    D. Coughlin, K. Clarke & A. Clarke

Authors
  1. J. Kähkönen
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  2. D. T. Pierce
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  3. J. G. Speer
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  4. E. De Moor
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  5. G. A. Thomas
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  6. D. Coughlin
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  7. K. Clarke
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  8. A. Clarke
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Corresponding author

Correspondence to E. De Moor.

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Kähkönen, J., Pierce, D.T., Speer, J.G. et al. Quenched and Partitioned CMnSi Steels Containing 0.3 wt.% and 0.4 wt.% Carbon. JOM 68, 210–214 (2016). https://doi.org/10.1007/s11837-015-1620-4

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  • DOI: https://doi.org/10.1007/s11837-015-1620-4

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