Numerical Simulation Of Hot Strip Rolling Process On Q345B Steel

China plays an important role in steel-producing, whose steel production tends to ascend. The production of crude steel in 2010 has exceeded 600 million tons, up 9 % over the same period of 2009. With the fast development of automotive, appliance, and construction industry, requirements to strip quality continue to increase. The flatness of strip has becoming the extensive focus and difficulty in strip rolling process.This paper bases on the analysis data in 1420mm hot strip rolling mill field with large-scale commercial software ANSYS / LS-DYNA on the strip rolling process as simulation. This paper uses elastic-plastic finite element method to simplify the on-site model, and also analysis the main reasons of influencing plate shape in rolling process, such as width, friction coefficient, bending force, front and back tension etc; the main reasons of influencing plate shape and the situation of rolls bending deformation in rolling process. From FEM analysis we can reach the following conclusions:Tension is a significant role in strip rolling process. It can improve rolled piece of metal flow inside obviously, reduce the convexity of the roll profile and rolling force, reduce torsion deformation of the rolls and prolong the service life of the roller.The mill general rolling force is an approximate linear growing with the increase of inlet board width. Growing of contact stress value and torsion of the rolls causes internal metal flowing uneven, increase strip crown.Friction coefficient between rolled-piece and work roll had an influence on strip shape. Strip crown, rolling force, roll bending deformation grow with the increase of friction coefficient increases. But lower friction coefficient can't fill with condition of roll bite. So the friction coefficient is important to ensure the product quality inspection factors.The bending forcel is a commonly used method in plate shape control. Reasonable bending force can effectively control the flow of internal metal, reduce rolling force and strip crown.This paper plays the role of a bridge between finite element method and the actual rolling process and provides a valid reference basis for the determination of the controlled rolling program.