Method for producing high-tension copper alloy enameled wire

A production method and technology of copper alloys, applied in the direction of metal/alloy conductors, electrical components, circuits, etc., can solve the problems of poor processing flexibility and plasticity, low elongation at break, etc., to achieve increased flexibility, performance and cost balance Effect

Inactive Publication Date: 2013-06-12
TIANHENGDA ELECTRICAL ENG SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The enameled wire used in the electroacoustic industry requires high tension, high conductivity, good processing flexibility and plasticity. The above-mentioned high-conductivity medium-strength copper alloy enameled wire has high tension and high conductivity, but generally has poor processing flexibility and plasticity. Shown as lower elongation at break

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 100 parts (weight) of pure copper and 3 parts (weight) of silver in the medium-frequency induction melting furnace, and melt evenly, and produce an oxygen-free copper rod with a diameter of 6mm by the above method, and use the copper rod as the raw material for drawing, and draw it step by step at room temperature Stretching, the deformation of each level is controlled between 6-8%, the cold drawing speed increases gradually with the decrease of the wire diameter, and the wire diameter is 1mm above 500-800 m / min, and the wire diameter is between 0.1-1mm Adopt 800-1000 m / min, and control the linear speed of 1000-1200 m / min for drawing semi-finished products with a diameter of 0.05 mm. After the drawing is completed, heat-preserve and anneal at a temperature of 500°C for 1.5 hours. The wire is sent to the production line of the horizontal enamelling machine, the enamelling line speed is 400 m / min, the insulating varnish and the self-adhesive paint layer are coated suc...

Embodiment 2

[0021] Add 100 parts (by weight) of pure copper, 0.5 parts (by weight) of silver and 1.5 parts (by weight) of chromium into a medium-frequency induction melting furnace, melt evenly, and produce low-oxygen copper rods with a diameter of 8 mm by continuous casting and rolling with low-oxygen method According to the wire drawing of Example 1, the wire drawing is drawn into a high-tensile copper alloy wire with a wire diameter of 0.1 mm, annealed at a temperature of 550 ° C for 1.5 hours, and coated with a single layer of direct soldering insulating varnish. The electrical conductivity of the product reaches 93% IACS. The tensile strength is about 450Mpa, and the elongation at break reaches 28%.

Embodiment 3

[0023] Add 100 parts (by weight) of pure copper, 0.5 parts (by weight) of silver and 0.5 parts (by weight) of tin to an intermediate frequency induction melting furnace, melt evenly, and produce low-oxygen copper rods with a diameter of 6 mm by continuous casting and rolling with low-oxygen method According to the wire drawing of Example 1, it is drawn into a high-tensile copper alloy wire with a wire diameter of 0.1 mm, annealed at a temperature of 550 ° C for 1.5 hours, and coated with a single layer of direct soldering insulating varnish. The electrical conductivity of the product reaches 95% IACS, and the resistance The tensile strength is about 420Mpa, and the elongation at break reaches 25%.

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Abstract

The invention discloses a method for producing a high-tension copper alloy enameled wire with high elongation at break. The method comprises the following steps of adding silver or any combination of silver and chromium, tin, magnesium or nickel into pure copper, manufacturing a copper rod, and drawing and forming the copper rod, wherein the tension deformation amount of the drawing and forming at each time is 6% to 8%; and then, annealing and shaping the copper rod at the temperature of 450 DEG C to 650 DEG C. The method has the advantages that the tension strength, the smoothness and the plasticity of the wire are improved, the tension strength and the plasticity of the wire are balanced, the tension strength of the wire reaches 380MPa to 500MPa, the conductivity reaches more than 93% of the conductivity of the pure copper wire, the elongation at break reaches more than 20%, the processing smoothness and the plasticity are proper, the process requirements of the high-tension enameled wire by the electric-acoustic industry are met, and the performance and the manufacturing cost are balanced.

Description

technical field [0001] The invention relates to a production method of high tension copper alloy enameled wire. Background technique [0002] Pure copper enameled wire has been widely used as high-fidelity wire in the electromagnetic wire and electroacoustic industry because of its excellent electrical conductivity, corrosion resistance and superior process performance, but the tensile strength of pure copper enameled wire is low, especially The strength of enameled wires with fine wire diameters is difficult to meet the requirements for enameled wires in some fields, such as speakers, earphones, and mobile phone receivers in the electroacoustic industry. Products are required to be miniaturized and lightweight. Low, it is difficult to meet the requirements of winding machinery. Modern industry requires enameled wire to have high electrical conductivity, high thermal conductivity, high tensile strength, and certain processing flexibility and plasticity. It is generally cha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00H01B1/02
Inventor 黄宗祥沈建北刘卫平吴春芝谢飞
Owner TIANHENGDA ELECTRICAL ENG SCI & TECH CO LTD
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