Effect of the main parameters of helical rolling on the ductility properties of hypereutectic silumin alloys

The author examines how the number of cycles in which the work rolls of a rotary rolling mill load semifinished products made of hypereutectic silumin alloys depends mathematically on the degree of deformation ε and feed angle in three-roll rotary rolling. Another mathematical model is proposed to describe the dependence of the dispersity (dimensions) of the silicon crystals (one of the two phases in the structure of hypereutectic silumins that adversely affects the ductility properties of these alloys) on the number of load cycles N^sub c^, the feed angle α, and the deformation ε. The proposed models adequately describe the experimental data, differing from the latter by no more than 5-7% and remaining within the permissible error.[PUBLICATION ABSTRACT]