METALWORKING PROCESS USING SEVERE SHEAR DEFORMATION BY REPETITIVE TORSION

摘要

The present invention relates to a method to destroy a cast structure using a repetitive torsion method and, more specifically, relates to a method capable of reducing process water and size of a process facility for a pressing process which is an intermediate processing process required to manufacture a finished product of a metal material by refining grains by collapsing a dense cast structure formed in a microstructure phase by a certain level through a torsion process for the metallic material manufactured by a casting method; thereby enabling the process to be economical.