MUNTIN Alexander Vyksa Steel Works

Spoluautoři ZINYAGIN Alexey

One of the main features of rolling process is the inhomogenity of strain in the cross section of slab. It is especially important to know strain distribution in case of massive slabs multipass rolling. Shear stress has a significant contribution in accumulated equivalent strain due to a change of sign in roll bite which is difficult to estimate assuming only the final result after pass is done. In case of physical simulation of hot rolling conditions Gleeble may be advisable to use as a separate sample imitation of a specific layer in thickness . Thus it is necessary to use the values of the equivalent strain derived from calculations using mathematical modeling. For a better understanding of the processes occurring during rolling, the FEM model has been created. In order to check stress distribution along the plate thickness, an experiment was made using a slab with staked pins. The pin located near the surface was more deformed than others and it almost didn't have cavities around. The deeper the pin is located, cavities become longer and higher, which means smaller compressive stresses along the axis Oy and larger tensile stresses along the axis Ox. The verification of model was made by comparison of expirement results with modelled ones.

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