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Observation of an Isothermal Transformation during Quenching and Partitioning Processing

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Abstract

The kinetics of the isothermal transformation, which occurs during a single-step quenching and partitioning (Q and P) process, was analyzed by means of dilatometry. Experiments revealed that an isothermal transformation with very specific characteristics occurred during the hold at the quenching temperature below the martensite start temperature. Although evidence for isothermal martensite transformation has been reported in the past for Fe-C alloys and steel, it is the first time that it is recognized to take place during the Q and P processing of low-carbon ferrous alloys.

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Acknowledgment

The authors gratefully acknowledge the support of POSCO (Pohang, South Korea) and ASPPRC (Colorado School of Mines, Golden, CO).

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Authors and Affiliations

  1. Materials Design Laboratory, Graduate Institute of Ferrous Technology, Pohang University of Science and Technology, Pohang, South Korea, 790-784

    Dong H. Kim (Graduate Student), Han S. Kim (Research Professor) & Bruno C. De Cooman (Professor and Director)

  2. Advanced Steel Processing and Products Research Centre, Colorado School of Mines, Golden, CO, 80401, USA

    John G. Speer (Professor)

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  1. Dong H. Kim
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  2. John G. Speer
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  3. Han S. Kim
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  4. Bruno C. De Cooman
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Correspondence to Bruno C. De Cooman.

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Manuscript submitted November 11, 2008.

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Kim, D.H., Speer, J.G., Kim, H.S. et al. Observation of an Isothermal Transformation during Quenching and Partitioning Processing. Metall Mater Trans A 40, 2048–2060 (2009). https://doi.org/10.1007/s11661-009-9891-4

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