Research on twin-roll strip cast-rolling based on a new sectional roll surface heat transfer boundary condition

Abstract

Twin-roll strip cast-rolling is a frontier process which produces a metallic strip directly from the melt. The main idea behind the presented research is to develop a new type of sectional roll surface heat transfer boundary condition. On this basis, a numerical simulation model of heat-flow coupling considering solidification was established to support the new boundary condition (BC). Finally, the simulation results are consistent with the experimental data, which verifies the BC. Meanwhile, the process parameters were optimized in depth through the model.

The Effect of the Thermal Deformation of Casting Roll on Strip Thickness in the Strip Casting Process

“…Kang and Sun defined the heat transfer coefficient of the contact area in detail through experimental data and related simulation studies. [ 16,17 ] Referring to Equation (2) between the velocity and the heat transfer coefficient, the heat flux actually measured in the production process was corrected. [ 18 ] The final interfacial heat transfer coefficient value suited for the field circumstances was determined by comparing the simulated temperature of the casting roll surface with the observed temperaturewhere h and v denote heat transfer coefficient (W m −2 K −1 ) and casting speed (m s −1 ), respectively.…”