Quenching and Partitioning of CMnSi Steels Containing Elevated Manganese Levels

Authors

  • Emmanuel De Moor,

    Corresponding author
    1. Advanced Steel Processing and Products Research Center, George S. Ansell Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, CO 80401, USA
    • Advanced Steel Processing and Products Research Center, George S. Ansell Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, CO 80401, USA.
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  • John G. Speer,

    1. Advanced Steel Processing and Products Research Center, George S. Ansell Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, CO 80401, USA
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  • David K. Matlock,

    1. Advanced Steel Processing and Products Research Center, George S. Ansell Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, CO 80401, USA
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  • Jai-Hyun Kwak,

    1. POSCO 700 Gumbo, Gwangyang, Jeonnam 545-711, Korea
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  • Seung-Bok Lee

    1. POSCO 700 Gumbo, Gwangyang, Jeonnam 545-711, Korea
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Abstract

Quenching and partitioning (Q&P) is receiving increased attention as a potential processing route to develop “Third Generation” advanced high strength steel (AHSS) properties. The Q&P process consists of quenching a steel from a reheat temperature to a pre-determined temperature in the Ms − Mf temperature region followed by a so-called partitioning treatment at the quench temperature or higher. The present contribution investigates the Q&P response of laboratory-processed CMnSi alloys with 3 or 5 wt% manganese. Samples were processed at quench temperatures between 70 and 250°C with partitioning temperatures of 400 and 450°C for times up to 100 s. Scanning electron microscopy and X-ray diffraction were utilized to evaluate the Q&P microstructures. Attractive properties were generated with tensile strength/total elongation combinations such as 1500 MPa and 17%.

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