Production method of high-strength copper rods for catenary cables of electrified railways

A technology of electrified railway and production method, which is applied in the field of copper rod production technology, can solve the problems of low strength and achieve the effect of good strength and good electrical conductivity

Active Publication Date: 2020-06-23
ANHUI CHUJIANG HIGH TECH ELECTRIC WIRE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the copper rods used in the catenary cables of electrified railways produced in the prior art often have the disadvantage of low strength, so how to produce high-strength copper rods for catenary cables of electrified railways is a need in the prior art. Technical issues resolved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In this embodiment, when the electrolytic copper is melted in the smelting device, 0.05wt% silver element is added to the copper liquid, and then a pulse voltage of 25-36V is applied to the copper liquid with a pulse current intensity of 4000A and a pulse frequency of 25000Hz. , The tensile strength of the copper rod produced is about 410MPA.

Embodiment 2

[0030] In this embodiment, when the electrolytic copper is melted in the smelting device, 0.08wt% silver element is added to the copper liquid, and then a pulse voltage of 25-36V, a pulse current intensity of 5000A, and a pulse frequency of 30000 Hz are applied to the copper liquid. , The tensile strength of the produced copper rod is about 450MPA.

Embodiment 3

[0032] In this embodiment, when the electrolytic copper is melted in the smelting device, 0.03wt% silver element is added to the copper liquid, and then a pulse voltage of 25-36V, a pulse current intensity of 4500A, and a pulse current of 20000 Hz are applied to the copper liquid. , The tensile strength of the copper rod produced is about 397MPA.

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Abstract

The invention belongs to the field of production processes of copper rods, and particularly relates to a method for producing a high-strength copper rod for electric railway contact net catenary wires. The method comprises the following steps: pre-heating and drying electrolytic copper in a smelting device by using the electrolytic copper with purity of 99.957 percent or above as a raw material sothat the electrolytic copper is melted, wherein the smelting device comprises a smelting furnace and a heat insulation furnace; a partition bin is arranged between the smelting furnace and the heat insulation furnace; the surface of copper liquid is coated with wood carbon and graphite flakes so that an oxygen isolation state during melting is ensured; through on-line gas removal, deoxidation andstirring, filtration is carried out through a ceramic crystallizer; and the copper rod is drawn up by adopting a traction unit in processes of drawing-up, back-pushing and stopping. The invention aims to overcome the defect of lower strength of the copper rod for the electric railway contact net catenary wires produced in the prior art and provides a production method of the high-strength copperrod for the electric railway contact net catenary wires.

Description

technical field [0001] The invention belongs to the field of copper rod production technology, and more specifically relates to a production method of high-strength copper rods for catenary cables of electrified railways. Background technique [0002] Copper wire rods are necessary blanks for the production of copper wires such as wires and cables, enameled wires, and electronic wires, and copper wires are one of the important basic materials for industries such as electronics, electricity, and communications. With the development of electronic telecommunications in the world, the demand for copper wire rods in the wire and cable, enameled wire and electronic wire industries is also increasing rapidly, which drives the increasing demand for copper wire rods and the higher quality requirements. [0003] At present, with the rapid development of domestic electrified railways, the demand for related supporting equipment, components and materials has shown explosive growth. Con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/14C22C1/02C22C9/00
CPCB22D11/004B22D11/145C22C1/02C22C9/00
Inventor 李雷雷王钟刘先国邢朝兵牛忠保张冬志侯树峰
Owner ANHUI CHUJIANG HIGH TECH ELECTRIC WIRE CO LTD
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