Preparation method of high current and high stability NbTi superconductor
A high-stability, high-current technology, applied in cable/conductor manufacturing, usage of superconductor elements, superconducting/high-conducting conductors, etc., to achieve the effect of satisfying large copper ratio
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[0019] The preparation method of the high-current high-stability NbTi superconductor of the present invention specifically comprises the following steps:
[0020] Step 1, hot-dip the NbTi / Cu multi-core superconducting round wire, the heating temperature of the tin solution is 300-320°C, and the hot-dip tinning speed is 80-120m / min, so that the surface is evenly coated with a layer of Sn-5 % Cu alloy.
[0021] Step 2, twist the NbTi / Cu multi-core superconducting round wires coated with tin on the surface in step 1 to make multi-strand conductors, such as figure 1 As shown, the twisted cable pitch is 100-200mm, the diameter of the round wire is 0.2mm-2mm, and the number of strands is 3-48. And process the special-shaped copper groove line whose groove width and groove depth match the conductor size, such as figure 2 shown.
[0022] Step 3, using wrapping equipment to spirally wind the commercially available Sn-5% Cu alloy thin strip on the surface of the multi-strand conduct...
Embodiment 1
[0026] The NbTi / Cu multi-core superconducting round wire is hot-dip tinned, so that the surface is evenly coated with a layer of Sn-5% Cu alloy, the heating temperature of the tin liquid is 300°C, and the hot-dip tinning speed is 100m / min. ; Twisting the NbTi / Cu multi-core superconducting round wire coated with tin on the surface to make a multi-strand conductor, the pitch of the twisted cable is 100mm, the diameter of the round wire is 0.7mm, and the number of strands is 7. The width of the special-shaped copper groove is 4.5mm, the height is 3.5mm, and the width and depth of the U-shaped groove are 2.3 and 2.4mm; the commercially available Sn-5% Cu alloy thin strip with a thickness of 0.05mm is spirally wound by winding equipment On the surface of multi-strand conductors, the wrapping pitch is 5mm, and the wrapping method is 50% lapping. The conductor wrapped around the thin strip of tin is placed in a special-shaped copper groove line, and the two are inlaid together by rol...
Embodiment 2
[0028] The NbTi / Cu multi-core superconducting round wire is hot-dip tinned, so that the surface is evenly coated with a layer of Sn-5% Cu alloy, the heating temperature of the tin liquid is 310°C, and the hot-dip tinning speed is 120m / min. ; Twisting the NbTi / Cu multi-core superconducting round wire coated with tin on the surface to make a multi-strand conductor, the pitch of the twisted cable is 150mm, the diameter of the round wire is 0.4mm, and the number of strands is 24. The width of the special-shaped copper groove is 7.5mm, the height is 5.5mm, and the width and depth of the U-shaped groove are 3.2 and 3.4mm; the commercially available Sn-5%Cu alloy thin strip with a thickness of 0.1mm is spirally formed by winding equipment Wound on the surface of multi-strand conductors, the wrapping pitch is 10mm, and the wrapping method is 67.7% overlapping. The conductor wrapped around the thin strip of tin is placed in a special-shaped copper groove line, and the two are inlaid to...
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Abstract
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