Prediction of mechanical and microstructural properties of hot rolled steels

Authors

  • A. Artigas Dpto. de Ingeniería Metalúrgica. Facultad de Ingeniería, Universidad de Santiago de Chile
  • M. Páez Dpto. de Química de los Materiales. Facultad de Química y Biología. Santiago de Chile
  • Y. Houbaert Ghent University, Dpt. of metallurgy and materials science.
  • A. Monsalve Dpto. de Ingeniería Metalúrgica. Facultad de Ingeniería, Universidad de Santiago de Chile.
  • D. Celentano Dpto.de Ingeniería Mecánica. Facultad de Ingeniería, Universidad de Santiago de Chile

DOI:

https://doi.org/10.3989/revmetalm.2002.v38.i5.417

Keywords:

Steels, Modelling, Hot rolling, Mechanical and microstructural properties,

Abstract


In this work, sets of experimental data obtained from laboratory or hot rolling plants steels belonging to the local siderurgical industry were structured in a semiempirical model. A modelization based on the finite element technique of the cooling curves was made for this kind of steels during the coiling process. From the cooling curves obtained with this technique, the precipitated nitrogen fraction was computed. At the same time, from the chemical composition data and reduction percent during hot rolling, a model that predicts the final grain size after hot rolling was established. From this value of grain size and the free nitrogen results obtained from the model plus the chemical composition and the process variables, the yield stress and ultimate tensile stress, UTS, were estimated. The parameters obtained were validated from either, laboratory or plant results. Furthermore, an statistical test in order to assure the validity of the correlation between the different experimental and predicted modelized properties was made. Finally, the different equations and algorithms used were integrated in user friendly software, which allows not only to predict mechanical and microstructural properties, but also to make sensibility analysis. This kind of work allows in turn to investigate new fabrication processes.

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Published

2002-10-30

How to Cite

Artigas, A., Páez, M., Houbaert, Y., Monsalve, A., & Celentano, D. (2002). Prediction of mechanical and microstructural properties of hot rolled steels. Revista De Metalurgia, 38(5), 339–347. https://doi.org/10.3989/revmetalm.2002.v38.i5.417

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