Влияние напряженно-деформированного состояния алюминиевого сплава в начальной стадии прессования на образование трещин

Abstract

It is analysed influences stress-strain condition on formation of longitudinal cracks in the extruded pipes from aluminum alloy Al6Mg. By means of a method of final elements the mechanism of creation of heterogeneity of distribution of deformation is described at an ingot. The same method is used for calculation of level of tangential stress at level of a calibrating corbel of a matrix. It is revealed that in the specified place there is the stretching tension provoking destruction of metal. The results of experiment confirming existence of stretching tension are given. The conclusion is drawn on existence of a set of the factors promoting formation of longitudinal cracks.