Finite Element Simulation Of Deformation Laws During Hot Rolling Ultra-low-carbon Steel

Extra-deep drawing IF steel as the third generation steel used for pressing, can almost satisfy the request of various properties for using in automobiles. The automobile industry also proposed higher requirements to the qualities and varieties of plate, especially the plate used for automobiles outer panel must be non surface defects, surface defects serious influence enterprise's economic efficiency.Finite element numerical simulation as one of the extensive applied technology,will play an important role on the product optimized design, cost reducing, the product development cycle shortening and forming defects forecast. Using finite element method to research the rolling course theory, can not only save experiment cost, but also may study the problem which difficult to experiment as its high speed and dependability. With the development of computer and software technology, finite element numerical simulation has successfully replaced most physical simulation of rolling.In this paper, using MSC.Marc/Mentat software as tool, a three-dimensional simulation model for different conditions rolling has been built using the elastoplastic finite element method (FEM). The dependence and practicability of finite element model is confirmed by making comparisons between simulation and test value of rolling force. The proposed model is used to explore the laws of plate deformed in vertical-horizontal rolling process using various vertical rollers, and given the laws of distribution of temperature and stress in deformation zone, the flow of corner metal, the shape of dog-bone and spread. The conclusion drawn from the simulation is of significance to predicting, analyzing and eliminating the shell defects of plate, and can also be used as basis for micro-structural evolution and mechanical property prediction.