| 摘要 |
1283293 Heat treatment of superconducting alloys FURUKAWA ELECTRIC CO Ltd 11 March 1970 [11 March 1969] 11617/70 Heading C7A A Nb-Ti superconducting alloy is obtained substantially in the beta-phase at room temperature, and is then subjected to a two-stage ageing treatment the first step being carried out at a lower temperature and for a longer period than the second stage. The alloy may contain 30% to 70% Nb, balance Ti, with optionally up to 4% in total of Mo, V, Zr, Ta, Hf, C, O, or N and be transformed to the beta phase by heating 800-1000‹C. followed by quenching. Preferably ageing is carried out at 150‹ to 400‹C. for 5 to 250 hours, followed by 0.3 to 10 hours at 350‹ to 550‹C., while a cold working step may precede ageing. As exemplified the alloy is clad with copper after solution treatment and drawn into wire with a 99% reduction in area.
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