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Effect of austenite deformation and chemical composition on the microstructure and hardness of low-carbon and ultralow-carbon bainitic steels

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Abstract

The effect of hot deformation and chemical composition on the microstructure and hardness of experimental grades of low-carbon and ultralow-carbon C-Mn-Mo-Nb-B steels is studied by the method of physical simulation. It is shown that deformation of austenite at a temperature below that of recrystallization leads to formation of polygonal ferrite and high-temperature ferrite with bainitic morphology. The effect is the most pronounced in boron-bearing steels. Simultaneous alloying with Mo, Nb, and B seems to be the most effective for ensuring high hardness.

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Authors and Affiliations

  1. Department of Mechanical Engineering, University of Oulu, Oulu, Finland

    P. P. Suikkanen, J. I. Kömi & L. P. Karjalainen

  2. Rautaruukki Oyj, Raahe, Finland

    P. P. Suikkanen, J. I. Kömi & L. P. Karjalainen

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  1. P. P. Suikkanen
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  2. J. I. Kömi
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  3. L. P. Karjalainen
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Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 11, pp. 27–31, November, 2005.

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Suikkanen, P.P., Kömi, J.I. & Karjalainen, L.P. Effect of austenite deformation and chemical composition on the microstructure and hardness of low-carbon and ultralow-carbon bainitic steels. Met Sci Heat Treat 47, 507–511 (2005). https://doi.org/10.1007/s11041-006-0021-2

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