| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method of manufacturing a hard copper material, which enables the manufacture of the hard copper material capable of sufficiently decreasing a softening temperature, and a method of manufacturing a soft copper wire by using the same.SOLUTION: A method of manufacturing a hard copper material, in which cold working is giant strain working and in which the hard copper material has a plasticity-equivalent strain of 1.8 or more, includes a working step of obtaining the hard copper material by applying the cold working to a workpiece containing copper.</p> |
