Preparation method of Cu-Nb-Ag ternary multi-core composite wire

Abstract

The invention provides a preparation method of a Cu-Nb-Ag ternary multi-core composite wire. The preparation method comprises the following steps of: (1) putting an Ag rod into a Nb tube; and then placing the Ag rod and the Nb tube into a Cu sheath together so as to obtain a Cu-Nb-Ag ternary single-core composite sheath; (2) welding and sealing two ends of the Cu-Nb-Ag ternary single-core composite sheath; (3) carrying out heat extruding treatment on the Cu-Nb-Ag ternary single-core composite sheath; (4) drawing the Cu-Nb-Ag ternary single-core composite sheath so as to obtain a Cu-Nb-Ag ternary single-core composite wire with an orthohexagnal section; (5) carrying out follow-up treatment on the Cu-Nb-Ag ternary single-core composite wire; (6) after bundling and assembling 400-500 Cu-Nb-Ag ternary single-core composite wires, placing the assembled Cu-Nb-Ag ternary single-core composite wires into the Cu sheath; and (7) repeating the step (2) to the step (6) for two times and repeating the step (2) to the step (4) once, so as to finally obtain the Cu-Nb-Ag ternary multi-core composite wire. The Cu-Nb-Ag ternary multi-core composite wire prepared by the preparation method provided by the invention has the advantages of good plastic deformation, room temperature tensile property and excellent conductivity and can be applied to the field of high magnetic field pulses.

Description

Technical field

[0001] The invention belongs to the technical field of metal matrix composite materials, and specifically relates to a method for preparing a Cu-Nb-Ag ternary multi-core composite wire. Background technique

[0002] In recent years, copper-based composite materials with high strength and high conductivity have been widely used in non-destructive pulsed magnetic fields with a magnetic field strength higher than 60T. In order to carry the huge current required for the operation of the magnet, the room temperature conductivity of the material is generally required to be greater than 65% IACS, and the room temperature tensile strength is greater than 1 GPa. The high-strength and high-conductivity Cu-Nb composite wire prepared by in-situ cluster technology and cluster drawing technology has become one of the representative conductor materials. Cluster drawing technology is the mainstream preparation technology of this type of material. The main purpose is to prepare C...

Examples

Embodiment 1

[0018] In the Cu-Nb-Ag ternary multi-core composite wire of this embodiment, the volume percentage of Nb is 21.5%, the volume percentage of Ag is 15.9%, and the balance is Cu.

[0019] The preparation method of the Cu-Nb-Ag ternary multi-core composite wire of this embodiment includes the following steps:

[0020] Step 1. Put a single Ag rod with a diameter of 30mm into a Nb tube with an outer diameter of 46mm, an inner diameter of 30mm and a mass purity of ≥99.9%, and then put them together in the first anaerobic tube with an outer diameter of 60mm and an inner diameter of 46mm. Inside the Cu sheath, a Cu-Nb-Ag ternary single-core composite sheath is obtained;

[0021] Step 2: Use a vacuum electron beam welder to seal both ends of the Cu-Nb-Ag ternary single-core composite sheath described in Step 1 by vacuum electron beam welding;

[0022] Step 3. Keep the Cu-Nb-Ag ternary single-core composite sheath welded in step 2 for 2 hours at a temperature of 700°C and then extrude, keep the ...

Embodiment 2

[0030] In the Cu-Nb-Ag ternary multi-core composite wire of this embodiment, the volume percentage of Nb is 18%, the volume percentage of Ag is 10%, and the balance is Cu.

[0031] The preparation method of the Cu-Nb-Ag ternary multi-core composite wire of this embodiment includes the following steps:

[0032] Step 1. Put a single Ag rod with a diameter of 24mm into a Nb tube with an outer diameter of 41mm, an inner diameter of 24mm and a mass purity of ≥99.9%, and then put them together in the first anaerobic with an outer diameter of 60mm and an inner diameter of 41mm Inside the Cu sheath, a Cu-Nb-Ag ternary single-core composite sheath is obtained;

[0033] Step 2: Use a vacuum electron beam welder to seal both ends of the Cu-Nb-Ag ternary single-core composite sheath described in Step 1 by vacuum electron beam welding;

[0034] Step 3. Keep the Cu-Nb-Ag ternary single-core composite sheath welded in step 2 for 3 hours at a temperature of 500°C and then extrude, keep the extrusion ...

Embodiment 3

[0042] In the Cu-Nb-Ag ternary multi-core composite wire of this embodiment, the volume percentage of Nb is 15%, the volume percentage of Ag is 20%, and the balance is Cu.

[0043] The preparation method of the Cu-Nb-Ag ternary multi-core composite wire of this embodiment includes the following steps:

[0044] Step 1. Put a single Ag rod with a diameter of 33.5mm into a Nb tube with an outer diameter of 44mm, an inner diameter of 33.5mm and a mass purity of ≥99.9%, and then put them together in the first with an outer diameter of 60mm and an inner diameter of 44mm. Inside the oxygen-free Cu sheath, a Cu-Nb-Ag ternary single-core composite sheath is obtained;

[0045] Step 2: Use a vacuum electron beam welder to seal both ends of the Cu-Nb-Ag ternary single-core composite sheath described in Step 1 by vacuum electron beam welding;

[0046] Step 3. The Cu-Nb-Ag ternary single-core composite sheath welded in step 2 is kept at a temperature of 600°C for 2.5 hours and then extruded, keepin...

Technical field

[0001] The invention belongs to the technical field of metal matrix composite materials, and specifically relates to a method for preparing a Cu-Nb-Ag ternary multi-core composite wire. Background technique

[0002] In recent years, copper-based composite materials with high strength and high conductivity have been widely used in non-destructive pulsed magnetic fields with a magnetic field strength higher than 60T. In order to carry the huge current required for the operation of the magnet, the room temperature conductivity of the material is generally required to be greater than 65% IACS, and the room temperature tensile strength is greater than 1 GPa. The high-strength and high-conductivity Cu-Nb composite wire prepared by in-situ cluster technology and cluster drawing technology has become one of the representative conductor materials. Cluster drawing technology is the mainstream preparation technology of this type of material. The main purpose is to prepare C...

Examples

Embodiment 1

[0018] In the Cu-Nb-Ag ternary multi-core composite wire of this embodiment, the volume percentage of Nb is 21.5%, the volume percentage of Ag is 15.9%, and the balance is Cu.

[0019] The preparation method of the Cu-Nb-Ag ternary multi-core composite wire of this embodiment includes the following steps:

[0020] Step 1. Put a single Ag rod with a diameter of 30mm into a Nb tube with an outer diameter of 46mm, an inner diameter of 30mm and a mass purity of ≥99.9%, and then put them together in the first anaerobic tube with an outer diameter of 60mm and an inner diameter of 46mm. Inside the Cu sheath, a Cu-Nb-Ag ternary single-core composite sheath is obtained;

[0021] Step 2: Use a vacuum electron beam welder to seal both ends of the Cu-Nb-Ag ternary single-core composite sheath described in Step 1 by vacuum electron beam welding;

[0022] Step 3. Keep the Cu-Nb-Ag ternary single-core composite sheath welded in step 2 for 2 hours at a temperature of 700°C and then extrude, keep the ...

Embodiment 2

[0030] In the Cu-Nb-Ag ternary multi-core composite wire of this embodiment, the volume percentage of Nb is 18%, the volume percentage of Ag is 10%, and the balance is Cu.

[0031] The preparation method of the Cu-Nb-Ag ternary multi-core composite wire of this embodiment includes the following steps:

[0032] Step 1. Put a single Ag rod with a diameter of 24mm into a Nb tube with an outer diameter of 41mm, an inner diameter of 24mm and a mass purity of ≥99.9%, and then put them together in the first anaerobic with an outer diameter of 60mm and an inner diameter of 41mm Inside the Cu sheath, a Cu-Nb-Ag ternary single-core composite sheath is obtained;

[0033] Step 2: Use a vacuum electron beam welder to seal both ends of the Cu-Nb-Ag ternary single-core composite sheath described in Step 1 by vacuum electron beam welding;

[0034] Step 3. Keep the Cu-Nb-Ag ternary single-core composite sheath welded in step 2 for 3 hours at a temperature of 500°C and then extrude, keep the extrusion ...

Embodiment 3

[0042] In the Cu-Nb-Ag ternary multi-core composite wire of this embodiment, the volume percentage of Nb is 15%, the volume percentage of Ag is 20%, and the balance is Cu.

[0043] The preparation method of the Cu-Nb-Ag ternary multi-core composite wire of this embodiment includes the following steps:

[0044] Step 1. Put a single Ag rod with a diameter of 33.5mm into a Nb tube with an outer diameter of 44mm, an inner diameter of 33.5mm and a mass purity of ≥99.9%, and then put them together in the first with an outer diameter of 60mm and an inner diameter of 44mm. Inside the oxygen-free Cu sheath, a Cu-Nb-Ag ternary single-core composite sheath is obtained;

[0045] Step 2: Use a vacuum electron beam welder to seal both ends of the Cu-Nb-Ag ternary single-core composite sheath described in Step 1 by vacuum electron beam welding;

[0046] Step 3. The Cu-Nb-Ag ternary single-core composite sheath welded in step 2 is kept at a temperature of 600°C for 2.5 hours and then extruded, keepin...

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