DEVELOPMENT OF THE STUDY OF MECHANISM OF “HEALING” DEFECTS OF CONTINUOUS CAST BILLET AXIAL ZONE ON A PHYSICAL MODEL

Abstract

The concept of metal construction minimization of finished products requires an increasing set of requirements for steels as structural materials. In this context, issues related to the study of the continuous casting defects macrostructure behavior (shrinkage, gas holes, axial porosity) during deformation are very actual. This work presents further development of metal forming processes research methods with layered physical models use. Layered models usage in conjunction with the proposed method of defects application on the surface of n -th layer and processing information method concerning the nature of its forming allows to evaluate the rate deformation influence during the process of “healing”. The initial adaptation of the proposed method applying to the conditions of the deformation process simulation of continuous casting in the first three rectangular breakdown stand calibers of linear mill 500/370 of PJSC “DMPZ” has been performed. Obtained experimental data allow to clarify the existing mechanism of “healing” of axial discontinuities defects in metal depending on the overall elongation and schemes of deformation application.