High-strength and high-conductivity rare earth copper alloy for contact lines and preparation method thereof

A rare earth copper and contact wire technology is applied in the field of copper alloy materials, which can solve the problems of high tensile strength and low electrical conductivity, and achieve the effects of improving elongation, excellent hot working performance and improving alloy strength.

Inactive Publication Date: 2015-11-25
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Chinese invention patent with publication number CN101386925A discloses a Cu-Cr-Zr alloy preparation process for contact wires. The alloy prepared by this process has a high tensile strength of not less than 590 MPa, but its electrical conductivity is not high, only 77%IACS

Method used

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  • High-strength and high-conductivity rare earth copper alloy for contact lines and preparation method thereof

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preparation example Construction

[0024] A preparation method of a high-strength and high-conductivity contact wire rare earth copper alloy comprises the following steps:

[0025] Step 1. Preparation of master alloy: put copper and zirconium in a vacuum non-consumable electrode arc melting furnace for melting, vacuumize to a pressure of 0.05Pa in the furnace, then fill in argon to a pressure of 0.05MPa in the furnace, and heat Melting at 1050-1100°C for 0.5-1h, natural cooling to obtain Cu-Zr master alloy for later use; put copper and rare earth into a vacuum non-consumable electrode arc melting furnace for melting, and vacuumize until the pressure in the furnace is 0.05 Pa, then filled with argon until the furnace pressure is 0.05MPa, heated to 1030-1070°C, smelted for 0.5-1h, and naturally cooled to obtain a Cu-rare earth master alloy for later use;

[0026] Step 2, smelting and mold casting: put copper, zinc, silver, titanium and the Cu-Zr master alloy and Cu-rare earth master alloy obtained in step 1 into ...

Embodiment 1

[0034] A rare-earth copper alloy for high-strength and high-conductivity contact wires. The rare-earth copper alloy is composed of chromium, zirconium, zinc, titanium, silver, copper, rare earth elements and inevitable impurity elements. The percentage by weight is 0.2% chromium, 0.2% zirconium, 0.1% silver, 0.2% zinc, 0.3% titanium, 0.02% cerium, 0.02% iridium, and the balance is copper and unavoidable impurity elements.

[0035] The specific preparation method is:

[0036] Step 1. Preparation of master alloy: put copper and zirconium in a vacuum non-consumable electrode arc melting furnace for melting, vacuumize to a pressure of 0.05Pa in the furnace, then fill in argon to a pressure of 0.05MPa in the furnace, and heat to 1050°C, smelted for 1 hour, and cooled naturally to obtain a Cu-Zr master alloy for later use; put copper and rare earth into a vacuum non-consumable electrode arc melting furnace for smelting, evacuate until the pressure in the furnace is 0.05Pa, and then ...

Embodiment 2

[0044] A rare-earth copper alloy for high-strength and high-conductivity contact wires. The rare-earth copper alloy is composed of chromium, zirconium, zinc, titanium, silver, copper, rare earth elements and inevitable impurity elements. The percentage by weight is 0.3% chromium, 0.2% zirconium, 0.15% silver, 0.2% zinc, 0.2% titanium, 0.05% cerium, and the balance is copper and unavoidable impurity elements.

[0045] The specific preparation method is:

[0046] Step 1. Preparation of master alloy: put copper and zirconium in a vacuum non-consumable electrode arc melting furnace for melting, vacuumize to a pressure of 0.05Pa in the furnace, then fill in argon to a pressure of 0.05MPa in the furnace, and heat to 1050°C, smelted for 1 hour, and cooled naturally to obtain a Cu-Zr master alloy for later use; put copper and rare earth into a vacuum non-consumable electrode arc melting furnace for smelting, evacuate until the pressure in the furnace is 0.05Pa, and then charge Enter ...

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Abstract

The invention relates to a high-strength and high-conductivity rare earth copper alloy for contact lines and a preparation method thereof. The rare earth copper alloy is composed of chromium, zirconium, zinc, titanium, silver, copper, rare earth elements and inevitable impurity elements, wherein during preparation, a Cu-Zr intermediate alloy and a Cu-rare earth intermediate alloy are prepared at first, and then the Cu-Zr intermediate alloy and the Cu-rare earth intermediate alloy are smelted and subjected to mould casting with copper, zinc, silver and titanium to form a cast ingot, the cast ingot is subjected to hot extrusion to obtain a bar billet, the bar billet is subjected to solution treatment, the treated alloy is subjected to drawing deformation, and then subjected to aging treatment to prepare the high-strength and high-conductivity rare earth copper alloy. The conductivity, elongation, strength and softening temperature of the alloy disclosed by the invention can be greatly improved; the machining performances of the alloy are remarkably improved; the manufacturability of the alloy can be changed, thus benefiting refining, degassing and microalloying; and the requirements of a material for the industrial field of contact lines on the performances of copper alloys can be met well. The alloy disclosed by the invention is simple in preparation process, short in process flow, high in strength, good in conductivity and excellent in hot-working property.

Description

technical field [0001] The invention relates to the technical field of copper alloy materials, in particular to a rare earth copper alloy for high-strength and high-conductivity contact wires and a preparation method thereof. Background technique [0002] The electrified railway catenary is an important part of the electrified railway. It is mainly composed of contact wires, current-carrying catenary cables, non-current-carrying catenary cables and hanging strings (wires). The direct contact of the slide plate transmits electric energy from the traction substation to the locomotive, which is a key component to ensure the normal operation of the electrified railway. The currently developed railway contact wire alloys include Cu-Ag, Cu-Mg, Cu-Sn and Cu-Cr-Zr alloys, among which Cu-Cr-Zr alloy as a railway contact wire alloy has high strength, high electrical conductivity, and high durability. Abrasiveness and high softening temperature are considered to be the most ideal cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C9/04C22C1/03C22F1/08
Inventor 张毅柴哲孙慧丽田保红刘勇周洪雷刘平许倩倩龙永强
Owner HENAN UNIV OF SCI & TECH
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