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

A copper-tin alloy and preparation process technology, applied in conductive materials, conductive materials, metal/alloy conductors, etc., can solve the problems of easy burnout, limited application, low strength, etc., achieve high strength and conductivity, and broaden applications. Scope, effect of refining precipitates

Pending Publication Date: 2021-01-29
CHINA RAILWAY CONSTR ELECTRIFICATION BUREAU GRP KANG YUAN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although pure copper and copper-silver alloy contact wires have high electrical conductivity, their strength is low, which limits their application on electrified railways with a speed of more than 300 kilometers per hour
Although copper-tin and copper-magnesium alloy contact wires can be used on electrified railways with a speed of more than 300 kilometers per hour, copper-tin contact wires are limited by their strength, so they are destined to be less widely used in electrified railways with a speed of more th

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A high-strength and high-conductivity copper-tin alloy contact wire, the chemical composition of the copper-tin alloy contact wire is: Sn 0.08wt%, Ca 0.04wt%, Zr 0.005wt%, the balance is Cu and unavoidable impurities; The chemical composition of the copper-tin alloy contact wire is prepared by sequentially adding Cu, Sn, Ca, and Zr in batches.

[0033] A preparation process for a high-strength and high-conductivity copper-tin alloy contact wire, specifically comprising the following steps:

[0034] (1) Add electrolytic copper to the smelting furnace for smelting, and add charcoal and graphite flake covering agent. The smelting temperature is controlled at 1190°C.

[0035] (2) Then add pure tin for smelting, and the smelting temperature is controlled at 1160°C.

[0036] (3) Add Cu-Ca and Cu-Zr intermediate alloys in turn for melting, and the melting temperature is controlled at 1100°C.

[0037] (4) CuSn prepared in step (3) 0.08 Ca 0.04 Zr 0.005 The temperature of t...

Embodiment 2

[0043] A high-strength and high-conductivity copper-tin alloy contact wire, the chemical composition of the copper-tin alloy contact wire is: Sn 0.30wt%, Ca 0.06wt%, Zr 0.01wt%, the balance is Cu and unavoidable impurities; The chemical composition of the copper-tin alloy contact wire is prepared by sequentially adding Cu, Sn, Ca, and Zr in batches.

[0044] According to the process steps (1)-(8) of Example 1, a high-strength and high-conductivity copper-tin alloy contact wire is obtained, wherein the upward lead speed in step (4) is 220mm / min, and the diameter of the upward lead copper rod is 23mm; step (5) Extruded into an extruded alloy rod with a diameter of 24mm.

Embodiment 3

[0046] A high-strength and high-conductivity copper-tin alloy contact wire, the chemical composition of the high-strength and high-conductivity copper-tin alloy contact wire consists of: Sn 0.50wt%, Ca 0.1wt%, Zr 0.02wt%, the balance is Cu and non Impurities to be avoided: the chemical composition of the copper-tin alloy contact wire is prepared by sequentially adding Cu, Sn, Ca, and Zr in batches.

[0047] According to the process steps (1)-(8) of Example 1, a high-strength and high-conductivity copper-tin alloy contact wire is obtained, wherein the upward lead speed in step (4) is 220mm / min, and the diameter of the upward lead copper rod is 23mm; step (5) Extruded into an extruded alloy rod with a diameter of 28mm.

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Abstract

The invention relates to a high-strength and high-conductivity copper-tin alloy contact wire and a preparation process thereof. The high-strength and high-conductivity copper-tin alloy contact wire comprises the following chemical components: 0.01wt%-0.8wt% of Sn, 0.01wt%-0.3wt% of Ca, 0.005wt%-0.05wt% of Zr and the balance Cu and inevitable impurities, wherein the chemical components of the copper-tin alloy contact wire are sequentially added in batches according to the sequence of Cu, Sn, Ca and Zr. The preparation process comprises the steps of smelting, upward continuous casting, solutiontreatment, aging treatment, continuous extrusion and drawing forming. The copper-tin alloy contact wire prepared by the method has higher strength and conductivity, and the application range of the copper-tin alloy contact wire is widened.

Description

technical field [0001] The invention belongs to the technical field of alloy materials, and in particular relates to a high-strength and high-conductivity copper-tin alloy contact wire and a preparation process thereof. Background technique [0002] With the continuous acceleration of electrified railways, higher requirements are placed on the comprehensive performance of contact wires. At present, contact wires can be divided into copper-chromium-zirconium, copper-magnesium, copper-tin, and copper-silver alloy contact wires. Although pure copper and copper-silver alloy contact wires have high electrical conductivity, their strength is low, which limits their application on electrified railways with a speed of more than 300 kilometers per hour. Although copper-tin and copper-magnesium alloy contact wires can be used on electrified railways with a speed of more than 300 kilometers per hour, copper-tin contact wires are limited by their strength, so they are destined to be le...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C9/02C22C1/03C22F1/08C22F1/02H01B1/02H01B13/00
CPCC22C1/03C22C9/00C22C9/02C22F1/02C22F1/08H01B1/026H01B13/00
Inventor 王国迎花思明路超何宇于婷赵德胜杨玉军寇宗乾孟宪浩沈华吴静高峰周婷
Owner CHINA RAILWAY CONSTR ELECTRIFICATION BUREAU GRP KANG YUAN NEW MATERIALS CO LTD
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