High-strength and high-conductivity copper-silver alloy wire and preparation method thereof

A copper-silver alloy, high-conductivity technology, applied in the direction of metal/alloy conductors, cable/conductor manufacturing, conductors, etc., can solve problems affecting the processability and uniformity of alloy wire rods, and achieve superior application value and market potential. Easy to operate, guaranteed uniform effect

Active Publication Date: 2022-06-21
NORTHEASTERN UNIV
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  • Application Information

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Problems solved by technology

[0007]For another example, CN105063412A discloses a high-conductivity oxygen-free copper-silver alloy rod and its production process. The inhomogeneity of the alloy rod structure brought about by the pull / stop characteristics of the casting process will affect the processability and structure uniformity of the alloy wire rod under deep drawing strain

Method used

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  • High-strength and high-conductivity copper-silver alloy wire and preparation method thereof
  • High-strength and high-conductivity copper-silver alloy wire and preparation method thereof
  • High-strength and high-conductivity copper-silver alloy wire and preparation method thereof

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preparation example Construction

[0034] A preparation method of a high-strength and high-conductivity copper-silver alloy wire of the present invention comprises the following steps:

[0035] Step 1: Select cathode electrolytic pure copper and high-purity silver with a purity of more than 99.99% as raw materials;

[0036]In the specific implementation, the raw materials are high-purity cathode electrolytic pure copper and high-purity silver. By weight percentage: the common content of copper and silver is 99.995%, the silver content is 2-4%, the oxygen content is ≤5ppm, iron, nickel, sulfur and phosphorus and The sum of other unavoidable impurities shall not exceed 10ppm.

[0037] Step 2: use vacuum magnetic levitation smelting to prepare copper-silver alloy ingots in a vacuum environment;

[0038] In the specific implementation, during the vacuum magnetic levitation melting process, the solution is heated to 1250 ℃ ~ 1300 ℃ for 1 to 2 hours, and the power is slowly reduced to the minimum to stop heating, an...

Embodiment 1

[0051] (1) The composition and mass percentage of copper-silver alloy raw materials are: Cu+Ag: 99.995%, Ag: 2%, O: 5ppm, Fe: 1.2ppm, S: 1.1ppm, P: 0.5ppm, the remainder is unavoidable Use vacuum magnetic levitation smelting, heat up to 1300 ℃ for 1 hour, slowly reduce the power to the minimum to stop heating, and then cool to room temperature with the furnace to obtain copper-silver alloy ingots;

[0052] (2) Carry out multiple free forging and final die forging on the copper-silver alloy ingot at 850°C, and forge it into a copper-silver alloy round bar with a diameter of 20mm;

[0053] (3) The copper-silver alloy round bar is continuously drawn to the drawing strain η=2.4, the drawing deformation rate is 72%, the pass deformation is 10% to 20%, and the wire drawing speed is about 6-10m / min, followed by intermediate heat treatment. The specific process is as follows: the copper-silver alloy wire is placed in a vacuum heating furnace, and under vacuum conditions, the tempera...

Embodiment 2

[0060] (1) The composition and mass percentage of copper-silver alloy raw materials are: Cu+Ag: 99.995%, Ag: 3%, O: 6ppm, Fe: 1.3ppm, S: 0.8ppm, P: 0.6ppm, the remainder is unavoidable Use vacuum magnetic levitation smelting, heat up to 1300 ℃ for 1 hour, slowly reduce the power to the minimum to stop heating, and then cool to room temperature with the furnace to obtain copper-silver alloy ingots;

[0061] (2) Carry out multiple free forging and final die forging on the copper-silver alloy ingot at 850°C, and forge it into a copper-silver alloy round bar with a diameter of 20mm;

[0062] (3) The copper-silver alloy round bar is continuously drawn to the drawing strain η=2.4, the drawing deformation rate is 72%, the pass deformation is 10% to 20%, and the wire drawing speed is about 5-9m / min, followed by intermediate heat treatment. The specific process is as follows: the copper-silver alloy wire is placed in a vacuum heating furnace, and under vacuum conditions, the temperat...

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Abstract

According to the high-strength and high-conductivity copper-silver alloy wire and the preparation method thereof, a high-strength and high-conductivity copper-silver alloy takes electrolytic pure copper and high-purity silver (99.99%) as raw materials, and a copper-silver alloy cast ingot is obtained through vacuum magnetic suspension smelting. And the cast ingot is subjected to repeated free forging and final die forging, and the copper-silver alloy round bar is forged. The high-strength and high-conductivity copper-silver alloy wire with the tensile strength not lower than 1 GPa and the conductivity not lower than 80% IACS (International Annealed Copper Standard) is obtained by carrying out continuous drawing on a copper-silver alloy round bar, then carrying out medium-drawing continuous annealing and fine-drawing continuous annealing, finally carrying out continuous drawing, and annealing in a protective atmosphere continuous annealing furnace at the temperature of 150-350 DEG C when the accumulative deformation reaches 90-95%, so as to obtain the high-strength and high-conductivity copper-silver alloy wire with the tensile strength not lower than 1 GPa and the conductivity not lower than 80% IACS (International Annealed Copper Standard). The prepared copper-silver alloy wire has the advantages of being high in strength, good in conductivity, uniform in structure, smooth in surface and the like, the yield is high, and follow-up split charging, wire twisting and the like are facilitated; and the requirements of high-strength and high-conductivity conductor materials in the fields of high-strength magnetic field systems, lead frames and the like can be met.

Description

technical field [0001] The invention belongs to the technical field of preparation of copper-silver alloy wires, and in particular relates to a high-strength and high-conductivity copper-silver alloy wire and a preparation method thereof. Background technique [0002] As an important extreme physical condition, strong magnetic field is a necessary experimental condition for the study of high temperature superconductivity and magnetic levitation. Strong magnetic field coils require conductor materials with both high strength to withstand the Lorentz force from the magnetic field and good electrical conductivity to reduce Joule heating. As the requirements of magnetic field strength are getting higher and higher, higher requirements are put forward for the mechanical properties and electrical conductivity of winding coil conductor materials, that is, the strength can reach 1GPa, and the electrical conductivity can reach more than 80% IACS. [0003] Copper-based alloys are cos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22F1/08C21D8/06C22F1/02C22C1/02B21C37/04B21C1/02H01B1/02H01B13/00
CPCC22C9/00C22F1/08C21D8/06C22F1/02C22C1/02B21C37/04B21C1/02H01B1/026H01B13/00H01B13/0016Y02P10/20
Inventor 任玉平齐林秦高梧
Owner NORTHEASTERN UNIV
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