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High-strength and high-conductivity copper-tin alloy contact wire and preparation method thereof

A copper-tin alloy, high-conductivity technology, used in metal/alloy conductors, cable/conductor manufacturing, circuits, etc., can solve problems such as tensile strength and electrical conductivity cannot be further improved, and electrified railway construction technology is stagnant. The effect of improving strength, toughness and electrical conductivity

Active Publication Date: 2016-06-01
JIANGYIN ELECTRICAL ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the increase of the speed of electrified railway, if the tensile strength and conductivity cannot be further improved, it will cause a stagnation in the construction technology of electrified railway

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0021] The invention relates to a high-strength and high-conductivity copper-tin alloy contact wire and a preparation method thereof. The copper content in the copper-tin alloy contact wire is ≥99.50% by weight, the oxygen content is ≤0.001% by weight, and the tin content is 0.38~ 0.40% by weight, the content of tellurium is 0.04% by weight, the content of lanthanum is 0.003-0.004% by weight, and the balance is unavoidable impurities.

[0022] Tellurium generally has two allotropes, one is crystalline tellurium, which has metallic luster, silvery white, brittle, and is similar to antimony; the other is amorphous powder, which is dark gray. Medium density (6.240g / cm3), low melting and boiling points (melting point 449.6°C, boiling point 989.9°C). It is a non-metallic element, but it has very good heat transfer and electrical conductivity. Among all non-metallic companions, its metallicity is the strongest, adding it to alloy materials can improve the corrosion resistance, wear...

Embodiment 1

[0025] Step 1. Smelting

[0026] Take the cathode copper-tin alloy, including 99.50kg of copper and 0.38kg of tin, and add it to the vacuum melting furnace, then take 0.04kg of tellurium and 0.004kg of lanthanum, place it in the vacuum melting furnace, heat it to 1150°C to form a copper-tin alloy liquid, and put it in the copper The surface of the tin alloy liquid is covered with a charcoal layer, so that the copper-tin alloy liquid is always isolated from oxygen;

[0027] Step 2, upward continuous casting

[0028] The graphite crystallizer is directly inserted into the copper-tin alloy liquid, and charcoal is used to isolate oxygen on the surface of the copper-tin alloy liquid, and the graphite crystallizer is cooled by a water spacer. The stretching mechanism is drafted to make a copper-tin alloy rod, and the pulling speed is 40cm / min;

[0029] Step three, continuous extrusion

[0030] The copper-tin alloy rod obtained in step 2 is placed in an extruder and continuously e...

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PUM

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Abstract

The invention relates to a high-strength high-conductivity copper-tin alloy contact line and a manufacturing method thereof. The copper-tin alloy contact line comprises, by weight, larger than or equal to 99.50% of copper, less than or equal to 0.001% of oxygen, 0.38-0.40% of tin, 0.04% of tellurium, 0.003-0.004% of lanthanum and the balance inevitable impurities. The method includes the following steps that cathode copper-tin alloy, the tellurium rare earth element and the lanthanum rare earth element are placed in a vacuum smelting furnace and heated to form copper-tin alloy liquid, and a charcoal layer covers the surface of the copper-tin alloy liquid; a hollow crystallizer directly extends into the copper liquid, cooled through a water jacket and drawn through a traction mechanism to be manufactured into a copper-tin alloy rod, and the copper-tin alloy rod is arranged in an extruding machine to be continuously extruded into a blank; the blank is placed on a drawing machine for cold drawing and forming, and the copper-tin alloy contact line is manufactured. The copper-tin alloy contact line manufactured through the method can meet the requirement for high strength and conductivity of the copper-tin alloy contact line is improved.

Description

technical field [0001] The invention relates to a high-strength and high-conductivity copper-tin alloy contact wire for a high-speed electrified railway catenary and a preparation method thereof, belonging to the technical field of electrical alloy materials. Background technique [0002] The contact wire is the key material of electrified railway catenary, which requires sufficient tensile strength, wear resistance and thermal stability to withstand its suspension tension, so as to ensure good current intake for electrified railway locomotives. [0003] Today, my country's electrified railway construction has entered a period of rapid development, and the construction technology for high-speed railways with a speed of 250 kilometers per hour, 350 kilometers per hour and above has matured, but foreign countries such as South Korea have already used high-speed electrified railways with a speed of 400 kilometers per hour. Higher requirements are put forward for the contact wire...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/02H01B9/00H01B13/00C22C9/02
Inventor 陈希康冯岳军张忠良
Owner JIANGYIN ELECTRICAL ALLOY