A kind of assembly method of nbti multi-core superconducting billet

Abstract

The invention discloses a method for composite assembly of multi-core superconducting ingots. In the method, the single mandrel and the oxygen-free copper tube are cleaned and the oxygen-free copper tube is cleaned and then placed on the working platform. The head is covered with a copper tube, and the head of the NbTi single mandrel is swaged by a rotary forging machine, and the traction tool is extended through the copper tube to clamp the part of the NbTi single mandrel head covering the copper tube, and the tractor is turned on to pull the NbTi single mandrel from the After the copper tube is pulled out, the multi-core superconducting ingot is obtained by swaging as a whole. The assembly method of the present invention, the traction tooling can stably and reliably fix the NbTi hexagonal rod, and the labor intensity is reduced by using the tractor, and the force is stable, reliable and uniform during the passing process. , improved the performance of NbTi multi-core superconducting ingot, so that the broken core rate is lower than 0.5%, the non-uniformity of wire current-carrying performance along the length direction is reduced to less than 3%, and the tensile strength is increased by 5%. In NbTi The multi-core superconducting ingot assembly field has wide applicability.

Description

technical field [0001] The invention belongs to the technical field of superconducting material processing, and relates to a method for composite assembly of multi-core superconducting ingots. Background technique [0002] The traditional preparation of NbTi / Cu superconducting wire is mainly the secondary assembly extrusion method, that is, the NbTi rod is combined with the copper matrix, and then extruded and drawn to form a single-core NbTi hexagonal rod, and then the NbTi hexagonal rod and the Cu hexagonal rod are bundled and placed Put it into the circular copper sheath, and use different specifications of circular copper rods to fill the gap between the hexagonal rod and the circular copper sheath, and compound to form a multi-core NbTi / Cu composite rod. The multi-core NbTi / Cu superconducting wire is made by extrusion and drawing. Although the technology of this preparation method is relatively mature, the work efficiency is low due to the many procedures. At the same ...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the technical problem that it is very difficult to manually pass the NbTi hexagonal rod through the oxygen-free copper tube in the prior art, the present invention provides a method for assembling the NbTi multi-core superconducting ingot. The mandrel is pulled out from the copper tube for assembly, which solves the problem of difficulty, time-consuming, laborious and high loss of NbTi hexagonal rods passing through the oxygen-free copper tube, so that the NbTi hexagonal rod larger than 3m can easily pass through the oxygen-free copper tube, and the traction method adopted The tooling can accurately and reliably pull the NbTi hexagonal rod through the oxygen-free copper tube, fix it reliably and will not damage the NbTi hexagonal rod, and has wide applicability in the field of multi-core superconducting ingot assembly

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