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High-chromium-copper alloy material and preparation method thereof

A copper alloy, high chromium technology, applied in the field of metal alloy materials, can solve the problems of high viscosity of alloy melt, difficult slag removal and slag removal, and difficulty in alloy pouring, etc., to achieve high production efficiency, save inert atmosphere protection, and high efficiency. Effect of anti-welding properties

Inactive Publication Date: 2015-12-16
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The copper-based in-situ composite material prepared in this patent has both high strength and high conductivity. Its tensile strength is 850-1300 MPa, electrical conductivity is 70-80% IACS, and softening temperature is 500-550°C. However, the melting point of chromium during vacuum melting is High, the viscosity of the alloy melt after melting is high, it is difficult to remove slag and slag, resulting in difficulty in alloy pouring, which greatly limits the popularization and application of this method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The high-chromium copper alloy material in the present embodiment consists of the following components in mass percentage: Cr20%, CeO 2 1.0%, the balance is Cu and unavoidable impurities.

[0028] The preparation method of high chromium copper alloy material comprises the following steps:

[0029] 1) Alloy melting

[0030] It is smelted in a ZG-0.2 200kg vacuum intermediate frequency induction melting furnace using the traditional atmospheric smelting method;

[0031] Get each component, first melt the standard cathode copper Cu-CATH-2 (purity ≥ 99.95%wt), and cover with a composite covering agent (composite covering agent proportioning: dehydrated borax 60%wt, calcined charcoal particles 40%wt, Particle size -20 mesh), heat up to 1300°C, add 0.02%wt phosphorus copper (Cu-0.006%wtP) for deoxidation, then add Cr block after refining for 10 minutes, keep warm for 20 minutes, press into 0.5mm thick standard cathode copper plate to cover CeO 2Powder (particle size 0.5 ~...

Embodiment 2

[0042] The high chromium copper alloy material in the present embodiment is made up of the component of following mass percentage: Cr35%, CeO 2 0.5%, the balance is Cu and unavoidable impurities.

[0043] The preparation method of high chromium copper alloy material comprises the following steps:

[0044] 1) Alloy melting

[0045] It is smelted in a ZG-0.2 200kg vacuum intermediate frequency induction melting furnace using the traditional atmospheric smelting method;

[0046] Get each component, first melt the standard cathode copper Cu-CATH-2 (purity ≥ 99.95%wt), and cover with a composite covering agent (composite covering agent proportioning: dehydrated borax 65%wt, calcined charcoal particles 35%wt, Particle size -20 mesh), heat up to 1300°C, add 0.02%wt phosphorus copper (Cu-0.006%wtP) for deoxidation, then add Cr block after refining for 10 minutes, keep warm for 20 minutes, press into 0.5mm thick standard cathode copper plate to cover CeO 2 Powder (0.5-2 μm in parti...

Embodiment 3

[0057] The high chromium copper alloy material in the present embodiment is made up of the component of following mass percentage: Cr50%, CeO 2 0.05%, the balance is Cu and unavoidable impurities.

[0058] The preparation method of high chromium copper alloy material comprises the following steps:

[0059] 1) Alloy melting

[0060] It is smelted in a ZG-0.2 200kg vacuum intermediate frequency induction melting furnace using the traditional atmospheric smelting method;

[0061] Get each component, first melt the standard cathode copper Cu-CATH-2 (purity ≥ 99.95%wt), cover with a composite covering agent (composite covering agent proportioning: dehydrated borax 70%wt, calcined charcoal particles 30%wt, Particle size -20 mesh), heat up to 1300°C, add 0.015%wt phosphorus copper (Cu-0.006%wtP) for deoxidation, then add Cr block after refining for 10 minutes, keep warm for 20 minutes, press into 0.5mm thick standard cathode copper plate to cover CeO 2 Powder (0.5-2 μm in particl...

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Abstract

The invention discloses a high-chromium-copper alloy material and a preparation method thereof and belongs to the technical field of metal alloy materials. The high-chromium-copper material alloy comprises, by mass, 20%-50% of Cr, 0.1%-1.0% of CeO2 and the balance Cu and inevitable impurities. The high-chromium-copper alloy material has high strength and high conductivity and meanwhile has high fusion welding resistance and arc erosion resistance. According to the performance indexes of the material, the hardness HV is 155-175, the conductivity is 30%-65% IACS, the softening temperature is 550-575 DEG C, the oxygen content is 450-550 ppm, the fusion welding force is smaller than or equal to 1.7*10-2 MPa under the direct-current load experiment conditions of 40V and 40A, and the contact resistance per unit area is smaller than or equal to 38.2 omega / m<2>. The requirements for high strength, fusion welding resistance and electric erosion resistance of a contact material in the vacuum switching industry can be met. Besides, the preparation process is simple, production efficiency is high, and cost is low.

Description

technical field [0001] The invention relates to a copper-chromium alloy material, in particular to a rare-earth oxide-reinforced high-chromium copper alloy material and a preparation method of the copper alloy material, belonging to the technical field of metal alloy materials. Background technique [0002] The promotion and application of vacuum switches in our country has entered a mature stage. Vacuum switchgear made of vacuum switch tubes has been widely used in various fields such as energy, transportation, metallurgy, aerospace, ships, and construction. [0003] Cu-Cr alloy is currently recognized as one of the best contact materials that can meet the basic requirements of vacuum switches in the world. Combined with copper bismuth with high breaking capacity and developed through a series of process improvements, it is a new low-resistance contact material, which combines several key electrical properties of contact materials, namely high withstand voltage and breaking...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C1/10C22F1/08
Inventor 田保红张毅刘勇贾淑果任凤章宋克兴李全安
Owner HENAN UNIV OF SCI & TECH
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