Method for preparing CuCr25ZrTe contact tip by vacuum casting process

A kind of electric contact material and electric contact technology, applied in the direction of electrical components, electric switches, circuits, etc., can solve the problems that affect the performance of contact materials, CuCr alloy contacts can resist welding and the cut-off value is not ideal, etc.

Active Publication Date: 2009-07-22
SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the welding resistance and current interception value of CuCr alloy contacts are not ideal
[0004] Excessive gas content in CuCr alloy will seriously affect the performance of contact materials

Method used

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  • Method for preparing CuCr25ZrTe contact tip by vacuum casting process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 1.75kg of Cr block, 5.25Kg of Cu block, and 0.0021Kg of Zr block in proportion and put them into the vacuum furnace. -2 Heating at a speed of 80°C / min under a vacuum of Pa, when the temperature rises to 1200°C, keep it warm for 60 minutes, put 0.0007Kg of Te into the alloy solution, keep it warm for 10 minutes; fast casting. After cooling, the CuCr25ZrTe electrical contact material is obtained.

Embodiment 2

[0020] Weigh 2.5kg of Cr block, 7.4Kg of Cu block, and 0.03Kg of Zr block in proportion and put them into the vacuum furnace, at P≤8×10 -2 Heating at a speed of 80°C / min under a vacuum of Pa, when the temperature rises to 1300°C, keep it for 40 minutes, put 0.03Kg of Te into the alloy solution, keep it for 7 minutes; fast casting. After cooling, the CuCr25ZrTe electrical contact material is obtained.

Embodiment 3

[0022] Weigh 1.25kg of Cr block, 3.75Kg of Cu block, and 0.0015Kg of Zr block in proportion and put them into the vacuum furnace. -2 Heating at a speed of 80°C / min under a vacuum of Pa, when the temperature rises to 1500°C, keep it warm for 30 minutes, put 0.0005Kg of Te into the alloy solution, keep it warm for 5 minutes; fast casting. After cooling, the CuCr25ZrTe electrical contact material is obtained.

[0023] The composite material prepared by the invention has excellent comprehensive properties. The performance comparison between the prepared CuCr25ZrTe composite material and CuCr composite material is shown in Table 1.

[0024] Table 1 Performance comparison of CuCr25ZrTe and CuCr25 composite materials of the present invention

[0025] material name

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Abstract

The invention discloses a CuCr25ZrTe electrical contact prepared by using a vacuum fusion casting, belonging to the technical field of metallic material preparation. The components of the electrical contact are according to the percentage by weight: 25% of Cr, 0.01-0.3% of Te, 0.03-0.3% of Zr and the rest of Cu. The electrical contact is prepared by the following method: a Cu block, a Cr block and a Zr block are well mixed and put into a melting hearth; the melting is carried out in vacuum; after melting, the element Fe is added and casted after keeping a period of time; thereby CuCr25ZrTe electrical contact materials are obtained after cooling. The invention has the advantages that Zr is added into CuCr alloy, which reduces the gas content of the alloy and increases the wearing resistance of the alloy; the Te is added into CuCr alloy, which reduces the tensile strength of the alloy and increases the anti-melting welding performance. The preparation method of the invention has simple technique and low cost. Compared with CuCr25 composite materials, the prepared CuCr25ZrTe composite materials have more excellent performance.

Description

technical field [0001] The invention belongs to the technical field of metal material preparation, and in particular relates to a method for preparing CuCr25ZrTe electric contacts by vacuum melting and casting. Background technique [0002] Since the metal vapor that maintains the vacuum arc is provided by the contact material, the characteristics of the contact material directly determine the behavior of the metal vapor in the arc, that is, the contact material is one of the important factors that determine the performance of the vacuum interrupter. With the rapid development of my country's electric power industry, people have put forward higher reliability requirements for the new generation of vacuum switches used in medium-voltage power distribution systems. The vacuum arc is a low-pressure arc burning in the metal vapor of the electrode material. The contact material has a decisive influence on the properties of the arc and the operation behavior of the vacuum switch, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H11/04B22D18/06C22C1/02
Inventor 王文斌王小军李刚梁建奇师晓云
Owner SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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