Welding method for yttrium series high-temperature superconducting tape

Abstract

The invention relates to a welding method for an yttrium series high-temperature superconducting tape. The welding method comprises the following steps of: fixing two sections of yttrium series high-temperature superconducting short tapes on two sides of one section of yttrium series high-temperature superconducting long tape to be welded to form a spreading plane area; flatly paving solder in the spreading plane area by adopting a solder heating mode to form a lapping area; lapping another section of yttrium series high-temperature superconducting long tape to the lapping area of the superconducting long tape to enable two sections of superconducting long tapes to have overlapped parts; respectively heating solder in the lapping areas of two sections of superconducting short tapes; melting the solder between the overlapped parts of two sections of superconducting long tapes by self heat transfer of the solder; after melting, wetting and spreading to enable the two sections of superconducting long tapes to be welded together through the solder between the overlapped parts; and finally, stripping two sections of superconducting short tapes by heating and finishing the welding. According to the welding method, the mode of directly heating the high-temperature superconducting tapes to be welded can be avoided, and thus the heating time is short, the superconducting performance of the high-temperature superconducting tapes are prevented from being influenced by high temperature during soldering; and the welding method has the advantages of strong operability, low possibility of generating pseudo soldering and high rate of finished products.

Description

technical field [0001] The invention belongs to the technical field of superconducting technology, and in particular relates to a welding method for yttrium-based high-temperature superconducting strips. Background technique [0002] Superconducting tape has many advantages such as super current carrying capacity and no heat loss, and can be widely used in power standby to improve equipment performance. According to different materials and processing techniques, the current high-temperature superconducting tapes are mainly divided into two types: yttrium-based superconducting tapes and bismuth-based superconducting tapes. As a new generation of high-temperature superconducting tape (ie, second-generation superconducting tape), yttrium-based superconducting tape has better electrical and mechanical properties than the first-generation bismuth-based high-temperature superconducting tape. At present, the production of strips has been industrialized and has been applied in many...

AI Technical Summary

Problems solved by technology

[0009] The problem with this welding method is: for the yttrium-based high-temperature superconducting strip, one side is the superconducting surface, and the other side is the baseband surface.

In this way, on the one hand, too low temperature may cause the solder to not melt completely, resulting in virtual welding, etc., which will affect the performance of the welded joint; on the other hand, heating the superconducting strip for a long time may affect the superconducting properties of the strip.