Refining Structure of Copper by SPD process

This research concerned the whole production of UFG materials, using Severe Plastic Deformation (SPD). These new technologies for production of semi-finished products with ultra-fine grained structure differ from conventional technologies. One of them is new type of equipment DRECE (Dual Rolling Equal Channel Extrusion), designated for obtaining UFG structure and increase of mechanical properties in strip of sheet. The main goal of the paper is a review of current achieved results obtained by processing of Cu based materials by DRECE method, the equipment of which was put in service towards the end of 2009 at the Department of mechanical technology, Faculty of mechanical engineering, VŠB - Technical University of Ostrava. Cu-based materials – technical pure Cu (99.3% purity) – is used as experimental material. Experiments with use of the formed structural material - copper was made on the forming device in order to achieve grain refinement in the strip of sheet (Cu 99,3% purity) with dimensions 58 × 2 × 1000 mm The paper describes results of determination of an influence of number of passes on resulting mechanical and micro-structural properties of the processed Cu-based materials.