| 摘要 |
<p>A substrate for a superconducting wire is made of Ni or Ni alloy, with a ratio of cube texture of 95 % or above constant in a width direction of a substrate body, a ratio of low-angle (15 or less) grain boundary of 99 % or above regularly distributed in the width direction, a thickness of 40-150D, an average grain size of IOOD or less, and a surface roughness of RMS 50 nm or less. A method for fabricating the substrate includes rolling a Ni or Ni-alloy rod with a rectangular section; and thermally treating the rolled rod, the rolling step having a reduction ratio of 5 to 15 % at each rolling, the rod being moved between rollers for the rolling process at a linear velocity of lOOm/min or less, the thermally treating process being conducted by heating above a recrystallization temperature with flowing an inert gas including hydrogen gas.</p> |
