Inclusion evolution in solid steel during rolling deformation: a review

Abstract

Rolling deformation is the fundamental process path in steel production, which not only changes the shape and size of the billet, but also improves the internal structure and mechanical properties. In the deformation process of steel matrix, the inclusion also evolves. In this paper, the research on inclusion evolution in solid steel rolling deformation process is reviewed, and the corresponding control strategies are pointed out from the perspective of inclusion deformation mechanism. The control methods for MnS focuses on reducing the difference in the hardness between MnS and steel matrix and on selecting the suitable rolling deformation process. The control method for silicate inclusions primarily focuses on altering the composition. The control direction of well-modified calcium aluminate inclusions involves removing the large size particles completely. Moreover, the strategy for inclusions with high hardness is to control their size. Finally, avenues for future research on inclusion deformation are proposed.

Keywords

• Rolling deformation
• Inclusion
• Relative plasticity index
• Evolution mechanism
• Control strategy