Manufacture methods of contact wire and rod blank

A technology for contacting wires and wire rods, applied in the direction of metal rolling, manufacturing extensible conductors/cables, root rods/rods/wires/strip conductors, etc., which can solve the problems of difficult uniform heating, high price, and poor solid-melt effect and other problems, to achieve the effect of simplifying smelting and heat treatment problems, good physical properties, and high mechanical strength

Active Publication Date: 2009-06-03
CHINA RAILWAY CONSTR ELECTRIFICATION BUREAUGRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, although precipitation-strengthened copper alloy materials have been widely used in metallurgy and other industrial fields, they have not yet been practically applied to railway contact wires. The reason is that the contact wires are longer, so that the volume and weight of the whole rod blank are larger; The requirements for smelting equipment are very high, and it is necessary to prevent the oxidation of alloy elements; the large-volume billet is not easy to be heated evenly during solid melting, and the solid-melting effect becomes poor; the large-volume copper alloy solid-melting furnace is expensive

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  • Manufacture methods of contact wire and rod blank

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preparation example Construction

[0030] Such as figure 1 as shown, figure 1 It is a schematic flow chart of the preparation method of the contact wire according to the present invention, which may specifically include the following steps:

[0031] Step 101: Melting the copper alloy; various appropriate smelting methods can be used, and it is necessary to ensure that chromium accounts for 0.4% to 1.0% of the total weight of the copper alloy, zirconium accounts for 0.05% to 0.2%, and the balance is composed of copper and other elements and unavoidable impurities; other elements can be metals such as rare earths or magnesium, accounting for 0.05% of the total weight of the copper alloy, and the content of impurities such as oxides is as low as possible.

[0032] Step 102: preparing an oxygen-free casting rod; pouring is performed under a protective atmosphere (for example, argon protection), or an oxygen-free casting rod is prepared by means of upward (horizontal) continuous casting, and the size of the obtaine...

Embodiment 1

[0042] 1) Non-vacuum melting copper alloy. Copper-chromium alloy and copper-zirconium alloy are added in the form of master alloy. In the furnace, chromium element accounts for 0.6% of the total weight, zirconium accounts for 0.1%, magnesium accounts for 0.05%, and the rest is copper. Argon protection.

[0043] 2) Prepare an oxygen-free casting rod.

[0044] 3) Put the casting rod into the solid melting furnace, the solid melting temperature is 950°C, keep it warm for 2 hours and then carry out water quenching.

[0045] 4) Clean the surface of the billet rod after solidification and connect it to ensure that the connection is free of oxides and other impurities and repair the connection.

[0046] 5) Send the connected billet rods into the Kangfu extrusion machine for continuous extrusion and cooling to obtain the contact wire rod billet.

[0047] 6) The billet is cold-rolled with a deformation of 45%.

[0048] 7) Carry out aging treatment, the temperature is 550 ℃, keep wa...

Embodiment 2

[0051] 1) Add electrolytic copper, rare earth, magnesium, chromium and zirconium into the vacuum induction furnace, wherein chromium accounts for 0.6% of the total weight, zirconium accounts for 0.1%, rare earth accounts for 0.05%, magnesium accounts for 0.05%, and the rest is copper. The melting temperature is 1300°C, and the temperature is lowered to 1250°C for casting after melting.

[0052] 2) Process the alloy billet into an oxygen-free cast rod.

[0053] 3) The cast rod is coiled and placed in a solid melting furnace with a solid melting temperature of 950° C., kept for 2 hours and then water quenched.

[0054] 4) Clean the surface of the billet rod after solidification, and make a seamless connection to ensure that the connection is free of oxides and other impurities and repair the connection.

[0055] 5) Send the connected billet rods into the Kangfu extrusion machine for continuous extrusion and cooling to obtain the contact wire rod billet.

[0056] 6) The billet is...

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Abstract

The invention discloses the manufacture methods of a contact wire and a rod blank. The manufacture method of the contact wire comprises the following steps: manufacturing a plurality of precipitation-strengthened copper alloy oxygen-free cast rods by smelting; preprocessing the oxygen-free cast rods to obtain a plurality of blank rods; connecting the plurality of blank rods seamlessly; feeding the connected blank rods to an extruder for continuous extrusion, and cooling the extruded contact wire rod blanks; cold-rolling the contact wire rod blanks, and subjecting to aging treatment; and cold-drawing the contact wire rod blanks for multiple times according to the predetermined section size of the contact wire to obtain the contact wire. The method can simplify the smelting and thermal treatment of the precipitation-strengthened copper alloy contact wire material. The manufactured contact wire has the advantages of fine and dense grains, higher mechanical strength, good conductivity, and better physical performance, and can meet the length requirement for railway construction.

Description

technical field [0001] The invention relates to the technical field of power supply wires, in particular to a method for preparing a contact wire and a rod blank. Background technique [0002] Electrified railway contact wire is one of the power supply wires used in the worst working environment, and its performance directly affects the safe operation of high-speed trains. The high-speed railway contact wire has a large rated working tension, and is constantly impacted and rubbed by the pantograph during long-term operation, and needs to endure arc ablation, temperature changes and the influence of the environment. In this case, the contact wire is required to have high tensile strength, wear resistance, corrosion resistance, good high temperature softening resistance, and good electrical conductivity for energy saving requirements. These are only the required material properties of the wire itself. In practical application, issues such as wire production cost, large-lengt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/008H01B5/02B21C23/02B21B1/16B21C1/02
Inventor 郑斌寇宗乾李学斌万传军孟宪浩侯晓俊张强刘建涛
Owner CHINA RAILWAY CONSTR ELECTRIFICATION BUREAUGRP
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