It is commonly known that shear strain occurring in asymmetric rolling process plays a very effective role to improve mechanical properties of metallic materials especially in the production of sheet metal. In the article preliminary research results of deformation in asymmetric rolling process influence on equivalent deformation distribution and austenite microstructure changes are presented. The C45 steel plate rolling process with reduction ε = 30 % in temperature 1000 °C were modeled. For experiments Forge 3D computer program based on FEM were used. The analyze of influence of different rolls speed ratio in range av= 1,0 ÷ 1,5 were done. Based on austenite microstructure evolution model the austenite grain size as a result of asymmetric rolling processes with different coefficient of rolls speed ratio was determined. It was found that strain distribution was inhomogeneous. The zones of increased strain were observed, which affected the uneven distribution of austenite grain size. Increasing different coefficient of roll speed ratio should caused a reduction in the uniform distribution of strains, and thus led to a more even distribution of the austenite grain size.Keywords: Asymmetric rolling process, shear strain, austenite evolution
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