ASYMMETRIC PROCESSING APPARATUS, ASYMMETRIC PROCESSING METHOD AND MATERIALS PROCESSED USING THE APPARATUS OR THE METHOD

摘要

PURPOSE: An asymmetric processing apparatus and method and a material processed using the same are provided to improve room-temperature formability of extruded-rolled materials by arranging a slip system to easily induce shear transformation at room temperature. CONSTITUTION: An asymmetric processing method comprises a step of pushing out a material through dies(230) with an extrusion hole having an asymmetric shape in the planar direction of the material to induce internal shear transformation along the thickness of the material and extrude the material(250), thereby obtaining an extruded material(260) and a step of pushing the extruded material between first and second rolls(101,102) with difference diameters to induce shear transformation on the extruded material and roll the extruded material, thereby obtaining a rolled material. The extrusion hole of the dies includes a tapered portion(234) varying in width in the extrusion direction of the extruded material.