Method for the manufacture of a tubular conductor suitable for superconducting cables
AssigneeSiemens Aktiengesellschaft
InventorsHeinrich Diepers, Otto Schmidt, Horst Musebeck
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Abstract
An improved method of manufacturing a tubular conductor which consist of a niobium layer and a copper layer, in which one side of a tube of electrolytic copper is plated with niobium by fusion electrolysis and the tube section thus produced, then drawn in several cold drawing passes to reduce the outside diameter and the wall thickness of the tube to form a longer tube, resulting in simplified production of seamless tubes, particularly useful in superconducting cables and having good mechanical, thermal and electrical contact between the niobium and copper layers.
Claims20
A method for manufacturing a tubular conductor consisting of a niobium layer and a copper layer, which conductor is particularly suited for a superconducting cable, comprising the steps of:
- a. plating one cylindrical surface of a seamless tube of electrolytic copper with a layer of niobium by fusion electrolysis;
- b. applying a lubricating coating to the niobium layer and copper surface;
- c. drawing the tube so formed in several cold drawing passes to reduce the outside diameter and the wall thickness of the tube and the niobium layer in order to form a longer tube.
Dependencies are inferred from the claim text.