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Method for evaluating the performance of recycled copper rods for electrical purposes

A technology of recycled copper and electrolytic copper rods, applied in the direction of electrical excitation analysis, material excitation analysis, etc., can solve the problems of insufficient evaluation of material properties, and achieve the effect of a convenient evaluation method

Active Publication Date: 2020-03-24
SHANGHAI ELECTRIC CABLE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Traditional detection methods have limitations in the evaluation of renewable copper rods for electrical purposes, and cannot fully evaluate the material properties. At present, there is an urgent need for a reliable and simple evaluation method for renewable copper rods for electrical purposes.

Method used

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  • Method for evaluating the performance of recycled copper rods for electrical purposes
  • Method for evaluating the performance of recycled copper rods for electrical purposes
  • Method for evaluating the performance of recycled copper rods for electrical purposes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The electrician of the present embodiment uses the evaluation method of the regenerated copper rod performance,

[0028] 1) measure the mass percent of each element in the copper rod to be tested;

[0029] 2) preparing the copper rod to be tested into a metallographic sample, and measuring the grain intercept average value of the metallographic sample;

[0030] 3) measure the surface Vickers hardness of the copper rod to be tested;

[0031] 4) When the mass percentage of each element in the copper rod to be tested meets the preset standard for the element mass percentage of the electrolytic copper rod, and the average grain intercept value of the metallographic sample prepared from the copper rod to be tested is within the predetermined The range of the grain intercept average value of the metallographic sample prepared by the electrolytic copper rod is set, and the surface Vickers hardness of the copper rod to be tested is within the range of the surface Vickers hardn...

Embodiment 2

[0047] Regarding the determination of the mass percentage of each element in the recycled copper rod and electrolytic copper rod for electrical purposes, this implementation makes an explanation:

[0048] 1) Determination of the mass percentage of oxygen element in recycled copper rods and electrolytic copper rods for electrical purposes

[0049] Three kinds of soft electrical recycled copper rods with a diameter of 8.0 mm that are common in the domestic market are selected as test samples, numbered 1#, 2#, and 3#. Take another piece of soft T1 electrolytic copper rod with a diameter of 8.0mm as a reference sample, numbered 4#.

[0050] In an environment with a temperature of 23°C and a humidity of 50%, weigh 0.30g to 1.00g for each sample, accurate to 0.001g, and put it into the sampler of the nitrogen and oxygen analyzer; measure according to the operating procedures of the instrument, independently The average value was measured twice. In an environment with a temperature...

Embodiment 3

[0065] Regarding the determination of the average value of the grain intercepts of metallographic samples corresponding to recycled copper rods and electrolytic copper rods for electrical purposes, this implementation makes an explanation:

[0066] Prepare a metallographic sample, and measure the average value of grain intercepts of 1#, 2#, 3#, and 4# samples in Example 2 according to the national standard GB / T6394-2002 "Measurement Method for Average Metal Grain Size". Among them, 1#, 2#, 3#, and 4# samples were taken from cross-sections to prepare metallographic samples. Using the hot-press mosaic method, the samples were made into mosaic samples, ground with 2000-grade sandpaper, and polished with woolen polishing cloth and 0.5 μm diamond polishing agent until the surface was free of scratches. After cleaning, it was corroded with ferric chloride for 5 seconds, rinsed, and metallographic pictures were taken with a ZEISSAxio Scope A1 metallographic microscope.

[0067] The ...

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Abstract

The invention provides a method of evaluating performance of an electrician's regenerated copper rod; the method comprises: measuring mass percent of each element in the cooper rod under measurement; making the cooper rod under measurement into a gold phase specimen, and measuring average grain intercept of the gold phase specimen; measuring surface Vickers hardness of the copper rod under measurement; when the mass percent of each element in the copper rod under measurement meets a preset standard for mass percent of elements in electrolytic copper rods and the average grain intercept of the gold phase specimen made with the copper rod under measurement is within a preset range of a gold phase specimen made with an electrolytic copper rod, determining the copper rod under measurement is an electrolytic copper rod; otherwise, determining the copper rod under measurement is an electrician's regenerated copper rod. By analyzing microscopic tissue composition and material performance of the copper rod under measurement, the reliable and convenient method for evaluating whether a copper rod under measurement is an electrician's regenerated copper rod is provided.

Description

technical field [0001] The invention relates to the technical field of performance evaluation of copper rods, in particular to a method for evaluating the performance of recycled copper rods for electricians. Background technique [0002] my country's copper resources are in short supply, and the utilization of scrap copper is increasing year by year. In recent years, the scrap copper imported from abroad has reached more than 4 million tons every year. Statistics show that by the end of 2012, the copper conductors used in the cable industry had reached 5.4 million tons, of which about 2.7 million tons were recycled copper conductors, accounting for half of the consumption. Compared with the production of primary copper, the use of scrap copper to recycle copper can save energy by 70% to 80%, and the advantages of energy saving and cost are significant. The recycling of waste miscellaneous copper not only expands the application range of copper metal resources, but also has...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/67
CPCG01N21/67
Inventor 姚大伟张远望袁德华
Owner SHANGHAI ELECTRIC CABLE RES INST
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