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Preparation method of high-purity oxygen-free copper rod

An oxygen-free copper rod and high-purity technology, which is applied in the field of preparation of high-purity oxygen-free copper rods, can solve the problem of the decrease of the electrical conductivity and mechanical properties of the copper rod, the low oxygen content of the oxygen-free copper rod, cracks or needle-shaped bubbles, etc. problem, to achieve the effect of low cost, bright surface and low oxygen content

Inactive Publication Date: 2016-07-13
张静
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: Aiming at the high oxygen content of copper rods produced by continuous casting and rolling, which causes the electrical conductivity and mechanical properties of copper rods to decline, and produces cracks or needle-shaped bubbles during annealing, a first method is provided. Preheat the surface-treated cathode copper ingot and then heat it up to completely melt the copper ingot, cover the surface of the molten copper ingot with the prepared dry graphite powder, continue heating and melting, and then pour the molten copper paste into the mold containing zinc wire and stand to cool to room temperature to obtain a zinc-containing oxygen-free copper rod. The affinity strength of zinc to oxygen is greater than that of copper to oxygen, which effectively prevents the oxidation of the copper rod, thereby preparing a high-purity oxygen-free copper rod. The method, the oxygen-free copper rod prepared by the present invention has a low oxygen content, the oxygen content is 3-7ppm, and there will be no surface scars or broken wires during processing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] First select the cathode copper ingot, wash its surface with absolute ethanol to prepare the surface treated cathode copper ingot, then place the surface treated cathode copper ingot in a crucible, place the crucible in a vacuum induction furnace, and evacuate it to 20Pa , Preheat the cathode copper ingot at 500℃ for 30min; then place the graphite in a muffle furnace at 200℃, under the protection of nitrogen, heat it until the graphite turns red, stand to cool and grind through a sieve to prepare 70 After the preheating of the cathode copper ingot is completed, the vacuum induction furnace is heated to 1180°C. When the copper ingot is completely melted, the dried graphite powder prepared above is covered on the surface of the molten copper ingot, and the covering thickness is controlled to be 200mm; Continue to heat and melt for 2 hours, and then pour the molten copper slurry into a semi-high speed steel mold under a vacuum of 20 Pa. The mold contains a spring-like zinc w...

example 2

[0019] First select the cathode copper ingot, wash its surface with absolute ethanol to prepare the surface treated cathode copper ingot, then put the surface treated cathode copper ingot in a crucible, place the crucible in a vacuum induction furnace, and evacuate it to 10Pa , Preheat the cathode copper ingot at 300℃ for 25min; then place the graphite in a muffle furnace at 120℃, under the protection of nitrogen, heat it until the graphite turns red, stand to cool and grind through a sieve to prepare 50 After the preheating of the cathode copper ingot is completed, the vacuum induction furnace is heated to 1120°C, and when the copper ingot is completely melted, the dried graphite powder prepared above is covered on the surface of the molten copper ingot, and the covering thickness is controlled to be 150mm; Continue to heat and melt for 1 hour, and then pour the molten copper slurry into a semi-high-speed steel mold under a vacuum of 10 Pa. The mold contains a spring-like zinc ...

example 3

[0021] First select the cathode copper ingot, wash its surface with absolute ethanol to prepare the surface treated cathode copper ingot, then place the surface treated cathode copper ingot in a crucible, put the crucible in a vacuum induction furnace, and evacuate it to 15Pa , Preheat the cathode copper ingot at 400℃ for 27min; then place the graphite in a muffle furnace at 180℃, under the protection of nitrogen, heat it until the graphite turns red, then stand to cool and grind through a sieve to prepare 60 After the preheating of the cathode copper ingot is completed, the vacuum induction furnace is heated to 1170°C, and when the copper ingot is completely melted, the dried graphite powder prepared above is covered on the surface of the molten copper ingot, and the covering thickness is controlled to 170mm; Continue to heat and melt for 1 hour, and then pour the molten copper slurry into a semi-high-speed steel mold under a vacuum of 15 Pa. The mold contains a spring-like zin...

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PUM

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Abstract

The invention relates to a preparation method of a high-purity oxygen-free copper rod and belongs to the technical field of oxygen-free copper rod preparation.The method comprises the steps that a cathode copper ingot subjected to surface treatment is firstly preheated and re-heat for temperature rise so that the copper ingot can be molten completely, heating melting continues after the surface of the molten copper ingot is covered with prepared dry graphite powder, then molten copper is poured into a mold containing zinc wires, standing and cooling are performed to reach room temperature, and a zinc-containing oxygen-free copper rod is obtained, then is mixed with a hydrochloric acid solution, is washed with deionized water and then is dried to obtain the high-purity oxygen-free copper rod.The prepared high-purity oxygen-free copper rod is low in oxygen content, and the oxygen content is 3-7 ppm.The surface of the high-purity oxygen-free copper rod is bright, and the phenomenon of surface scratching or wire breakage is not produced during machining.The preparation steps are simple, and the required costs are low.

Description

Technical field [0001] The invention relates to a method for preparing a high-purity oxygen-free copper rod, and belongs to the technical field of oxygen-free copper rod preparation. Background technique [0002] Oxygen-free copper (generally copper products with an oxygen content of less than 20 ppm) is widely used in the production and manufacture of electronics, electrical engineering, and electrical devices due to its good electrical and thermal conductivity. The high-frequency launch tube, cross tube, magnetron, vacuum switch tube and other products of electric vacuum devices must use oxygen-free copper materials. [0003] At present, the oxygen content of the low-oxygen copper rod produced by continuous casting and rolling on the market is 200-400ppm, and the oxygen content of the oxygen-free copper rod produced by the process is 10-20ppm, and the oxygen content is relatively high. Too high oxygen content has the following effects on product quality: (1) It can form Cu with ...

Claims

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Application Information

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IPC IPC(8): C22C1/02B22D21/00B22D27/00
CPCC22C1/02B22D21/00B22D27/00
Inventor 张静薛培龙高玉刚
Owner 张静