A simulation model for two-roll cross wedge rolling (CWR) was presented by using three-dimensional rig- id-plastic finite element method (FEM).The whole forming process of CWR,including knifing zone,guiding zone, stretching zone,and sizing zone,was simulated using the model in which dynamic adaptive remeshing technology for tetrahedral solid elements was used to fix element distortion.Based on the simulation results,the distributions of metal flow field,strain field,and damage field,and the geometry of the workpiece's end were analyzed.These re- sults could provide theoretical guidance for realizing net shaping and reasonable design of tools.
Using three-dimensional rigid-viscoplastic finite element method(FEM), a coupling multivariable numeri- cal simulation model for steel plate rolling has been established based on the physical metallurgy microstructural evo- lution rule and experiential equations.The effects of reduction, deformation temperature, and rolling speed on the deformation parameters and microstructure in plate rolling were investigated using the model. After a typical rolling process of steel plate 16Mn is simulated, the strain,temperature,and microstructure distributions are presented, as well as the ferrite grain transformation during the period of cooling. By comparing the calculated ferrite grain sizes with measured ones, the model is validated.
