Influence Analysis of the Reduction of Vertical Roller on H-beam R-zone Deformation

Using three-dimensional thermal-mechanical-coupled elastoplastic finite element method, the influence of the reduction of vertical roller on H-beam R-zone radius was investigated by simulation. The mechanism of web folding was stated from the R-zone match between the roller R-zone and rolling R-zone. The results showed that with the increase of the reduction, the R-zone radius decreases and are a linear relationship. The fluctuation of R-zone shape increased with the vertical roller reduction increase. The critical conditions of web folding were obtained for the near net special shaped continuous casting billet of UC305 mm×305 mm specification, when the reduction is more than 38 mm or less than 44 mm, the web folding would appear.