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Eutectoid Transformations in 4.12 Mass Pct Cr 0.88 Mass Pct C Steel

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Abstract

The sequence of eutectoid microstructures, obtained by lowering the temperature of the isothermal transformation, was studied in synthetic steel with 4.12 mass pct Cr 0.88 mass pct C. The results were compared with observations on plain carbon steels with 1.65 and 1.67 mass pct C. In both cases, the main features can be explained as an effect of a lowered temperature on the increasing supersaturation of cementite in austenite and an even stronger effect on that of ferrite. One distinction was a continuous change in the pearlite structure toward a more acicular structure. This structure is named acicular pearlite.

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Acknowledgments

This work was performed within the VINN Excellence Center Hero-m, financed by VINNOVA, the Swedish Governmental Agency for Innovation Systems, Swedish Industry, and KTH (Royal Institute of Technology). The authors express their profound appreciation to Professor Emeritus Mats Hillert for his contributions to this work.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, KTH (Royal Institute of Technology), SE-10044, Stockholm, Sweden

    P. Kolmskog (Postdoctoral Student) & A. Borgenstam (Associate Professor)

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  1. P. Kolmskog
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  2. A. Borgenstam
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Correspondence to P. Kolmskog.

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Manuscript submitted January 10, 2011.

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Kolmskog, P., Borgenstam, A. Eutectoid Transformations in 4.12 Mass Pct Cr 0.88 Mass Pct C Steel. Metall Mater Trans A 42, 3941–3951 (2011). https://doi.org/10.1007/s11661-011-0794-9

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