Study on Stress–Strain and Deformation Behavior of Bloom in the Heavy Reduction Process Under Single Roll

In order to obtain the key parameters of the bloom heavy reduction process in continuous casting, the mathematical model of solidification heat transfer of bloom continuous casting was established by using the general simulation software of billet secondary cooling. Then, combined with Abaqus finite element software, the stress–strain and deformation behavior of billet was investigated in detail. The results demonstrated that the calculation error tends to stabilize when the size of the reduction roll unit is below 15 mm. The stress of billet is distributed symmetrically along the thickness direction, and decreases from the inner arc and the outer arc to the center. The maximum stress increases from 119 to 140 MPa in the range of 10 to 30 mm reduction amounts, resulting in the increase of the corner crack tendency. The reduction amount shall be greater than 10 mm to effectively improve the internal quality of the billet. In addition, the side strain of the billet is basically consistent with the deformation distribution in the width direction and has a good linear relationship.