MODELING OF HEAT-TRANSFER, PLASTIC-FLOW AND MICROSTRUCTURAL EVOLUTIONDURING SHAPE ROLLING

The paper describes investigations on the development of an integrated model allowing for the prediction of heat transfer, plastic now, and microstructure evolution during shape rolling. Finite element method w as adopted to describe the heat transfer and plastic now phenomena. Ge neralized plane strain method is applied to modelling the 3D problem u sing 2D finite element formulation. In consequence, significant saving s of the computing time and required memory can be obtained. A compute r program in FORTRAN 77 was written according to the developed mathema tical model. Data on temperature, strain and strain rate relevant to t he rail rolling process were computed and employed to model microstruc ture evolution in austenite.