H - Beam Field Of Hot Rolling Temperature And Rolling Force Simulation,

The H-beam is a high efficient economic cross-section steel, which has a more optimized profiles cross-sectional area distribution and a more rational ratio of strength to weight. It has been widely used because of its high resistance to bend, simple construction, low cost and light weight of structure weight.By thermal-mechanical coupled finite element method, choosing Q235 hot-rolled H-beam steel as the research object, using ANSYS, LS-DYNA software, the temperature field distribution during rolling process, the rolling force during rolling process and the temperature field distribution in the controlled cooling process after rolling were obtained.The strain field,metal flow and temperature field distribution were obtained, choosing the HN600×200 size H-beam steel of breakdown rolling fourth pass as the research objective. The deformations were very uneven, the smallest strain was in the web site, and the leg part occurred large strain, waist-Leg joints occurred the largest strain. The metal flow situation was more complicated, the metal moved from the outside of the waist-Leg joints part to the end of the leg, from the inside of the leg to the waist-Leg joints part. The results of temperature field simulation using the new anti-hyperbolic sine constitutive material model and the literature dates as well as the results of the traditional thermal elastic-plastic model were in good agreement. Established the rolling force model of H-beam steel and chose the HN800×300 size H-beam of universal rolling seventh pass of TM group as the Research Objective. The predicted roll forces are consistent with the actual values from the rolling mill and the errors are less than 10%. The influencing factors of rolling force were simulated as well, and found that as the web rolling reduction ratio increased, the web width increased, the diameter of the horizontal roller increased, the rolling temperature decreased, the rolling speed increased, the initial leg width decreased, the rolling force of the horizontal rolling increased. As the leg rolling reduction ratio increased, the initial leg width increased, the diameter of the vertical roller increased, the rolling temperature decreased, the initial leg thickness increased, the rolling force of the vertical roller increased.Established the H-beam finite element model in the cooling process after rolling, compared with the literature data, the error was less than 30℃,so the dates were in good agreement and the model was available. Designed four different controlled cooling programs, and assumed the program 1,namely waist w1= 2.2L/(m2·s), external middle leg w2=5 L/(m2·s), legs, w3= 3 L/(m2·s), waist-leg connections w4= 5.5 L/(m2·s), had the best cooling effect, considering the max temperature,min temperature and the temperature difference in the cross-section.