Method for improving the springback qualities of superconductors
AssigneeOutokumpu Oy
InventorJuhani Teuho
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Abstract
The invention relates to a method for improving the springback qualities of superconductors. According to the method, a superconducting wire is in the final stage of production cold worked with a minimal reduction, in which case the springback qualities are improved but the residual resistivity ratio RRR still remains sufficiently high.
Claims11
A method for improving springback qualities of solely a Cu/NbTi superconducting composite wire consisting of NbTi filaments and copper matrix material and simultaneously maintaining the residual resistivity ratio (RRR) comprising the steps of:
- soft annealing matrix copper;
- and
- subjecting the composite wire to a cold working reduction with a reduction corresponding to the elastic limit of the superconducting composite wire.
A method for improving springback qualities of a Cu/NbTi superconducting wire and simultaneously maintaining the residual resistivity ratio (RRR), comprising the steps of:
- soft annealing matrix copper;
- subjecting the composite wire to a cold working reduction with a reduction corresponding to the elastic limit of the superconducting wire;
- and
- the composite wire being subjected to an overdrawing for carrying out the cold working up to 3%.
Dependencies are inferred from the claim text.