Deformation Behavior of Non-Metallic Inclusions during the Hot Torsion Process of Carbon Steel

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Abstract: The effect of total strain and strain rate on the deformation behavior of inclusions in a plain carbon steel was investigated by hot torsion tests which were performed by employing a Gleeble 3500 thermal simulator. The inclusions in the steel were Al2O3-SiO2-MnO type with a small amount of MnS. The deformation of inclusions was well characterized in the current work. There was an increasing trend on both the deformation and the inclination angle of inclusions with the increase of total strain during the hot torsion process, and the increasing extent would be higher when the total strain was larger than 90%. On the whole, the aspect ratio of inclusions decreased and the inclination angle increased with the increase of strain rate, however, the effect was not so obvious as the total strain. It was found that large inclusions would be deformed better during the hot torsion process. Meanwhile, the deformation of small inclusions was estimated to be more sensitive to the size.

Authors: Kaiyu Peng, Wen Yang, and Lifeng Zhang

Keywords: Non-metallic inclusion , Deformation , Hot torsion, Strain, Strain rate

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8 pages

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