PURPOSE: To easily obtain an Al stabilized superconducting wire of high quality by extrusively coating aluminium on a superconducting core material, rolling it, binding some wires into several groups, coating aluminium thereon, and by applying rolling processes in turn.
CONSTITUTION: After a Nb-Ti billet 1 is forged and face-cut, it is hot-extruded into a Nb-Ti pin material 2. Al is extrusively coated on the pin material 2 by a conform extrusion method, into a superconducting primary element material 3. The element material 3 is rolled by forced lubrication rolling, into an Al coated superconducting wire 4. The wire 4 is stranded into a strand 5, which is processed into a molding strand 6 of circular cross section through die- drawing. Al is extrusively coated on the strand 6 by conform extrusion, into a superconducting secondary element material 7, which is rolled by forced lubrication rolling, into an Al stabilized superconducting wire 8. The deformation in the cross sectional direction is made even thereby, and a long-size cable can easily be manufactured.
OGAWA KINYA
SUZUKI TAKUYA
ENDO TAKESHI
