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Abstract
In this paper, the development of process modelling within the Department of Metallurgy at The University of Sheffield is traced. This was initially concerned with predicting temperature distributions generated during hot-extrusion and hot-rolling operations, but the principles of finite-difference modelling have also been applied to upset forging and compression testing. The modelling of microstructural evolution during multipass working operations from the basis of laboratory test data was developed separately. These two aspects have been combined, and the effects of microstructure, temperature, and other engineering variables on flow stress have been incorporated to produce a model of hot rolling which predicts microstructural changes at each stage of the process and takes into account their effect on rolling-load and power requirements.
MST/168