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Extra-fine copper alloy wire, extra-fine copper alloy twisted wire, coaxial cable, multi-core cable and manufacturing method thereof

A copper alloy wire, coaxial cable technology, applied in the direction of coaxial cable/analog cable, manufacturing coaxial cable, cable/conductor manufacturing, etc., can solve the problems of reduced tensile strength, insufficient bending, insufficient strength, etc.

Active Publication Date: 2007-06-27
HITACHI CABLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in this ultra-fine copper alloy stranded wire, although the main purpose of improving the bending characteristics in the plastic deformation field is to ensure the elongation characteristics to be 5% or more, but for the emphasis on the elongation characteristics, the tensile Intensity must decrease
Therefore, especially for the use of cables for electronic equipment or cables for medical equipment using ultra-thin wires with a diameter of 0.025mm or less, such as probe cables for ultrasonic diagnostic equipment or cables for ultrasonic endoscopes, there is a need for strength. Insufficient, insufficient flexibility

Method used

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  • Extra-fine copper alloy wire, extra-fine copper alloy twisted wire, coaxial cable, multi-core cable and manufacturing method thereof
  • Extra-fine copper alloy wire, extra-fine copper alloy twisted wire, coaxial cable, multi-core cable and manufacturing method thereof
  • Extra-fine copper alloy wire, extra-fine copper alloy twisted wire, coaxial cable, multi-core cable and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] Fabrication of Cu-Ag alloy wires.

[0084] Add 2.0% by weight of silver to oxygen-free copper, elongation (%). Furthermore, as the evaluation of heat resistance, heat processing was performed at 350 degreeC for 5 second, and the intensity change of the tensile strength after that was compared. Then wire drawing is carried out until the wire diameter is 0.025-0.010 mm, and an ultra-fine copper alloy wire is obtained. Then, the obtained ultrafine copper alloy wire is heat-treated under heat treatment conditions within a prescribed range to produce an ultrafine copper alloy wire.

[0085] The tensile strength (MPa), electrical conductivity (%IACS), and elongation (%) of the produced ultrafine copper alloy wires of various sizes were measured. Furthermore, as the evaluation of heat resistance, heat processing was performed at 350 degreeC for 5 second, and the intensity change of the tensile strength after that was compared. Here, the heat resistance was evaluated by the ...

Embodiment 2

[0089] Next, the production of Cu-Ag alloy stranded wire will be described.

[0090] 2.0% by weight of silver was added to oxygen-free copper, heated and melted in a graphite crucible fixed in a vacuum box, and then cast into a Φ8.0mm wire billet by continuous casting using a graphite mold. Thereafter, through wire drawing, intermediate annealing, wire drawing, and silver plating, and then further wire drawing until the wire diameter is 0.025-0.010 mm, an ultra-fine copper alloy wire is obtained. Furthermore, seven ultrafine copper alloy wires obtained for each size were twisted to obtain an ultrafine copper alloy twisted wire.

[0091] The tensile strength (MPa), electrical resistance (Ω / km), and elongation (%) of the produced ultrafine copper alloy wires of various sizes were measured. Furthermore, as the evaluation of heat resistance, heat processing was performed at 350 degreeC for 5 second, and the intensity change of the tensile strength after that was compared. Here, ...

Embodiment 3

[0172] Manufacture of 43AWG coaxial cables.

[0173] 2.0% by weight of silver was added to oxygen-free copper, and after heating and melting in a graphite crucible fixed in a vacuum box, a graphite mold was used to continuously cast to produce a Φ8mm wire billet. Thereafter, through wire drawing, intermediate annealing, wire drawing, and Ag plating on the final wire to make the coating thickness reach 1 μm, and then wire drawing to obtain a wire diameter of 0.023 mm to obtain an ultra-fine copper alloy wire. Seven such 0.023 mm Ag-plated copper alloy wires (Cu-2%Ag) were prepared and twisted at a pitch of 1.1 mm to produce a twisted wire with an outer diameter of 0.069 mm. Then, the obtained twisted wires were subjected to five types of moving heat treatments in a heat treatment furnace heated at 350° C. to obtain ultrafine copper alloy twisted wires.

[0174] The tensile strength and electrical resistance before and after heat treatment of this ultrafine copper alloy strande...

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Abstract

The object of the invention is to provide an extra-fine copper alloy wire, an extra-fine copper alloy twisted wire, an extra-fine insulated wire, a coaxial cable having high intensity, low resistance and high heat tolerance, their manufacturing method and a multicore cable thereof. The extra-fine copper alloy wire has 1 to 3 weight % of silver in the copper, a wire diameter less than 0.025 mm, and a tensile strength of more than 850 MPa, an electrical conductivity of more than 85% IACS after heat treatment; the coaxial cable (20A) is configured that, an inner conductor is formed by an extra-fine copper alloy twisted wire (3) twisted from seven extra-fine copper alloy wires (1), the inner conductor is then peripherally envelopped with a solid insulator (5a) to form an extra-fine insulated wire (10), a plurality of conductor wires (13) are winding in a screw shape on the periphery of the extra-fine insulated wire along a length direction of the extra-fine insulated wire to form an outer conductor (15), thereafter, the outer conductor is envenlopped with a protection layer (17).

Description

technical field [0001] The present invention relates to an ultra-fine copper alloy wire having high strength and high electrical conductivity, which is difficult to decrease in strength during heat-loaded operations such as extrusion and soldering, and is excellent in heat resistance. Stranded wires, insulated wires, and coaxial cables thereof, their manufacturing methods, and multi-core cables manufactured using them. Background technique [0002] Alloys having high strength and high conductivity are generally used as conductor materials used in flexure-resistant cables for electronic equipment (eg, robot cables) or flexure-resistant cables for medical equipment (eg, probe cables). [0003] Currently, Cu-Sn alloy wires and Cu-Sn-In alloy wires, which can be produced economically by continuous casting and rolling, are widely used in electronic equipment as copper alloy wires manufactured at a mass production level. and conductor materials for bend-resistant cables for medic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B5/02H01B1/02C22C9/00B21F7/00H01B7/00C22F1/08H01B11/18H01B13/00H01B13/02H01B13/016
CPCY02A30/00
Inventor 黄得天黑田洋光松井量濑谷修冈田良平增井信一中川龙二冲川宽
Owner HITACHI CABLE
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