Abstract A process for the production of a composite wire having an aluminum core and niobium cover surrounding it, the composite wire being produced from a starting rod having an aluminum core in the form of a rod with a hollow niobium cover surrounding it, which starting rod is drawn down using a drawing aid through a plurality of cold drawings until a strong bond between the aluminum and niobium is obtained and in which the composite so formed is subjected to a surface cold deformation after the removal of the drawing aid. In such a method, the present invention provides an improved manner of producing the starting rod in which a carrier is covered with a layer of niobium through fusion electrolysis after which the carrier is removed and the niobium tube formed in that manner then pushed on an aluminum rod of suitable diameter.
IN A LOW TEMPERATURE PROCESS FOR PRODUCING A COMPOSITE WIRE HAVING AN ALUMINUM CORE AND NIOBIUM CASE SURROUNDING THE CORE WITHOUT SUBMITTING THE COMPOSITE WIRE TO ANY TEMPERATURE ABOVE ABOUT 100*C., IN WHICH PROCESS AN INITIAL ROD IS PRODUCED FROM A ROD-LIKE ALUMINUM CORE WITH A NIOBIUM CASE SURROUNDING THE CORE AFTER WHICH THE INITIAL ROD IS REDUCED IN CROSS SECTION BY A PLURALITY OF COLD DRAWING STEPS, WITH A DRAWING AID APPLIED TO AND SURROUNDING THE NIOBIUM CASE, THEREBY
Claim 2
Dependent Claim
80 words
IN A LOW TEMPERATURE PROCESS FOR PRODUCING A COMPOSITE WIRE HAVING AN ALUMINUM CORE AND NIOBIUM CASE SURROUNDING THE CORE WITHOUT SUBMITTING THE COMPOSITE WIRE TO ANY TEMPERATURE ABOVE ABOUT 100*C., IN WHICH PROCESS AN INITIAL ROD IS PRODUCED FROM A ROD-LIKE ALUMINUM CORE WITH A NIOBIUM CASE SURROUNDING THE CORE AFTER WHICH THE INITIAL ROD IS REDUCED IN CROSS SECTION BY A PLURALITY OF COLD DRAWING STEPS, WITH A DRAWING AID APPLIED TO AND SURROUNDING THE NIOBIUM CASE, THEREBY
Claim 3
Dependent Claim
11 words
The method according to claim 1 wherein said carrier is copper.
Claim 4
Dependent Claim
31 words
The method according to claim 2 and further including the step of removing a layer of approximately 0.1 mm from the inside of the niobium case after removal of the carrier.
Claim 5
Dependent Claim
23 words
The method according to claim 1 wherein the niobium case is smoothly lathe turned on the outside prior to removal of the carrier.
Claim 6
Dependent Claim
11 words
The method according to claim 4 wherein said carrier is copper.