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Characterization of Flame Cut Heavy Steel: Modeling of Temperature History and Residual Stress Formation

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Abstract

Heavy steel plates are used in demanding applications that require both high strength and hardness. An important step in the production of such components is cutting the plates with a cost-effective thermal cutting method such as flame cutting. Flame cutting is performed with a controlled flame and oxygen jet, which burns the steel and forms a cutting edge. However, the thermal cutting of heavy steel plates causes several problems. A heat-affected zone (HAZ) is generated at the cut edge due to the steep temperature gradient. Consequently, volume changes, hardness variations, and microstructural changes occur in the HAZ. In addition, residual stresses are formed at the cut edge during the process. In the worst case, unsuitable flame cutting practices generate cracks at the cut edge. The flame cutting of thick steel plate was modeled using the commercial finite element software ABAQUS. The results of modeling were verified by X-ray diffraction-based residual stress measurements and microstructural analysis. The model provides several outcomes, such as obtaining more information related to the formation of residual stresses and the temperature history during the flame cutting process. In addition, an extensive series of flame cut samples was designed with the assistance of the model.

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Acknowledgments

The funding for this work was mainly provided by the TUT graduate school. The authors would like to thank Mr. Juha Uusitalo from the University of Oulu for carrying out the Gleeble experiments.

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Author notes

  1. T. Jokiaho

    Present address: Laboratory of Materials Science, Tampere University of Technology, P.O. Box 589, 33101, Tampere, Finland

Authors and Affiliations

  1. Laboratory of Materials Science, Tampere University of Technology, P.O. Box 589, 33101, Tampere, Finland

    A. Laitinen, S. Santa-aho, M. Isakov, P. Peura, A. Lehtovaara & M. Vippola

  2. SSAB Europe Oy, Rautaruukintie 155, 92101, Raahe, Finland

    T. Saarinen

  3. Sandvik Mining and Construction Oy, Pihtisulunkatu 9, 33330, Tampere, Finland

    T. Saarinen

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  1. T. Jokiaho
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  2. A. Laitinen
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  3. S. Santa-aho
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  4. M. Isakov
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  5. P. Peura
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  6. T. Saarinen
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  7. A. Lehtovaara
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  8. M. Vippola
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Corresponding author

Correspondence to T. Jokiaho.

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Manuscript submitted March 31, 2017.

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Jokiaho, T., Laitinen, A., Santa-aho, S. et al. Characterization of Flame Cut Heavy Steel: Modeling of Temperature History and Residual Stress Formation. Metall Mater Trans B 48, 2891–2901 (2017). https://doi.org/10.1007/s11663-017-1090-x

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  • DOI: https://doi.org/10.1007/s11663-017-1090-x

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