Regular Article

Deformation behavior of MnO13%-Al₂O₃18%-SiO₂69% inclusion in different steels during hot rolling processes

¹ State Key Laboratory of Advanced Metallury, University of Science and Technology Beijing, Beijing 100083, PR China
² College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063299, PR China

^* Corresponding author: 371367023@qq.com

Received: 17 April 2017
Received in final form: 23 May 2017
Accepted: 18 July 2017

Abstract

To investigate the influence of steel properties on the deformation behavior of MnO13%-Al₂O₃18%-SiO₂69% inclusions during hot rolling processes. The deformation of inclusions with rolling temperatures (800, 850, 900, 925, 950 and 1000 °C) in three steels (A, B, C) have been simulated with a finite element method. The equivalent plastic strain distributions and the shapes of inclusions after rolling are obtained by the model. The influences of rolling temperatures, flow stress of steel, reduction, etc., on the voids length and the deformation degree of inclusions are discussed. We note that 900, 925 and 950 °C are the critical temperatures of the inclusion deformations in steel A, B and C, respectively. No voids occur above the critical temperature. Voids form between the matrix and inclusions below the critical temperature. And the lower rolling temperature leads to the longer length of voids and the smaller deformation of inclusions. The mechanism of voids formation is also analyzed. Experiments on the slab deformations using a titanium ball instead of the inclusion inside the slab at 950 °C during hot rolling processes are conducted. The simulated shapes of the inclusions mostly agree with the experimental results.