| 摘要 |
<p>A treatment process for a zirconium alloy is provided. The process includes the following steps: a zirconium alloy ingot is prepared, the composition of which is: 0.40%≰Nb≰1.05%; traces≰Sn≰2%; (0.5Nb−0.25)%≰Fe≰0.50%; traces≰Ni≰0.10%; traces≰(Cr+V)%≰0.50%; traces≰S≰35 ppm; 600 ppm≰O≰2000 ppm, preferably 1200 ppm≰O≰1600 ppm; traces≰Si≰120 ppm; traces≰C≰150 ppm; the remaining being Zr and unavoidable impurities; the ingot undergoes at least one reheating and hot shaping step, and possibly a reheating and quenching step following a hot shaping step; optionally the hot-shaped ingot undergoes an annealing; the hot-shaped and possibly annealed ingot undergoes at least one cycle of cold rolling-annealing steps; the annealing of at least one of the cold rolling-annealing steps being performed at a temperature comprised between 600° C. and the lowest of either 700° C. or (710−20×Nb %)° C., and the annealings of the other cold rolling-annealing steps, if any, being performed at a temperature not higher than 600° C. Also provided are a Zr alloy so obtained, and part of a fuel assembly for a light water nuclear reactor made of it.</p> |
