Metal treatment – Compositions – Heat treating
Patent
1983-11-29
1985-04-02
Stallard, W.
Metal treatment
Compositions
Heat treating
29599, H01L 3912
Patent
active
045085781
ABSTRACT:
A method of manufacturing a fine multifilamentary Nb-Ti based superconducting wire was disclosed, which comprises a first step of processing an alloy consisting essentially of 10 to 50 atomic % of niobium, 40 to 75 atomic % of titanium and no higher than 30 atomic % of least one element selected from a group consisting of hafnium, tantalum and tungsten to form an alloy wire, a second step of covering said alloy wire with a stabilizer, cold drawing the resultant wire, bundling a plurality of stabilizer-clad wires thus obtained, covering the bundle of wires with a stabilizer, and extruding and cold drawing the resultant bundled wire to thereby form a multifilamentary wire, and a third step of thermally treating the resultant multifilamentary wire at a temperature of 250.degree. to 600.degree. C. and drawing the resultant treated multifilamentary wire to a reduction rate of 30 to 99.9%. The third step is carried out more than once.
REFERENCES:
patent: 3514850 (1970-06-01), Barber et al.
patent: 3616530 (1971-11-01), Chester
patent: 3715243 (1973-02-01), Clayton et al.
patent: 3837066 (1974-09-01), Mori et al.
IEEE Transactions on Magnetics, vol. MAG-17, No. 1, pp. 53-56, Jan. 1981.
Murase Satoru
Tachikawa Kyoji
Wada Hitoshi
Yamada Yutaka
National Research Institute
Stallard W.
Tokyo Shibaura Denki Kabushiki Kaisha
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