METAL WIRE MATERIAL HAVING LARGE STRAIN LED THEREIN BY CONTROLLED WORM ROLLING, AND METHOD AND APPARATUS FOR MANUFACTURING THE METAL WIRE MATERIAL

摘要

The true strain by the hole -type rolling mill of a controlled warm- temperature metal wire into multiple groups into at least 0.25 or more to form the large deformation by rolling a continuous metal wire , and so that the two or three public car car imparting excellent strength and ductility without the need for special heat treatment to the metal wire as well as with the public , the prior art could not obtain the degree production of the great efficiency of the bonding wire to provide a method and an apparatus for producing good .