Superconductive current lead welding method

A lead welding, superconducting current technology, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of remelting and loosening of solder, and achieve the effect of reducing the chance of heating, low temperature and easy operation.

Inactive Publication Date: 2009-04-08
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
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  • Description
  • Claims
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Problems solved by technology

Therefore, when using the above-mentioned traditional method to connect the lower end of the high-temperature superconductor and the superconducting magnet, it is easy to cause the solder in the first step of brazing to melt and loosen again, and the superconductor is heated to the temperature of tin brazing again.

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0014] as in Figure 1a As shown, the copper column 1 is first soldered with the tubular high-temperature superconductor 2 by tin brazing, and at the same time, the solder is hung on the plane 3 of the copper column 1 . Such as Figure 1b As shown, the copper block 4 is first soldered with tin brazing with the lead-out wire 5 of the superconducting magnet, and at the same time, the solder is hung on the plane 6 of the copper block 4, and the area to be welded from the plane 6 is covered with cloth while it is hot, i.e. Figure 1b Shaded area shown, quickly wipe to remove excess solder on this area.

[0015] exist figure 2 In the process, the copper pillar 1 and the high-temperature superconductor 2 that have been welded together are put on a lathe to turn the solder layer on the plane 3 until only a thin layer of solder remains on the plane ...

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Abstract

A method for welding the leading superconductor wire includes such steps as soldering a superconductor onto a transition copper block while applying a thin tin layer to another surface of said copper block to be soldered and soldering between two transition copper blocks by use of the solder with low smelting point.

Description

technical field [0001] The invention relates to a welding method between superconducting wires in current leads of cryogenic devices. Background technique [0002] The most primitive current lead in cryogenic devices is a piece of structure, made of copper or alloy materials. After the emergence of high-temperature superconductors, in order to reduce the heat leakage of the current leads, the current leads are changed to a two-stage structure, especially for the case of supplying power to superconducting magnets (or samples) in the extremely low temperature region. In the two-stage structure, the section above the liquid nitrogen temperature zone is still made of copper or alloy materials, and the section below the liquid nitrogen temperature zone is a tubular, rod-shaped or strip-shaped high-temperature superconductor. [0003] Since the current carried by the superconducting current lead is generally relatively large, in order to reduce the joint resistance or consider th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K1/19B23K1/20
Inventor 雷沅忠赵保志戴银明宋守森王秋良
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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