The Theoretical and Experimental Researches of Pb-al Composite Materials Extrusion

The work presents the analysis of the character of a simultaneous plastic fl ow of composite material of a hard coresoft sleeve structure. Experimental research work using model composite material Aluminium-Lead and theoretical analysis allowed to identify the initial cracking conditions, its character and localization, depending on geometrical parameters of the composite materials and the extrusion ratio value. It has been shown that the higher the parameters’ values are, the longer the fl awless extruded product is (cracking appears in the further stages of the process).