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High-performance copper chromium contactor material and preparing method thereof

A copper-chromium contact, high-performance technology, applied in the field of high-performance copper-chromium contact material and its preparation, can solve the problems of large outgassing, poor electrical and thermal conductivity, etc., and achieve the effects of energy saving and simple process

Active Publication Date: 2015-11-04
SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The copper chromium contact material produced by the present invention is used in medium and high voltage vacuum circuit breakers. Since the lead material prepared by this process has the advantages of high density and uniform structure, it is beneficial to improve the poor electrical conductivity and thermal conductivity of the existing process, and the amount of outgassing large problems while maintaining good resistance to fusion welding

Method used

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  • High-performance copper chromium contactor material and preparing method thereof
  • High-performance copper chromium contactor material and preparing method thereof
  • High-performance copper chromium contactor material and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A high-performance copper chromium CuCr25 contact material is composed of the following components by weight: Cr is about 25%, and the balance is Cu; the raw materials are respectively 50-300 micron Cr powder and 300 micron Cu powder. The chromium powder is electrolytic chromium powder or thermite reduced chromium powder, and the copper powder is electrolytic copper powder or atomized copper powder. The purity of the chromium powder is 99.3%-99.98%.

[0040] The preparation method of described high-performance copper chromium CuCr25 contact material, comprises the following steps:

[0041] (1) Raw material selection

[0042] Select 50-300 micron electrolytic chromium powder or thermite reduced chromium powder and electrolytic copper powder or atomized copper powder below 300 microns;

[0043] (2) mixed powder

[0044] By Cu powder: the weight ratio of Cr powder is about 7.5: 2.5, and by the mixed powder of Cu powder and Cr powder: the weight ratio of copper ball=1: 1...

Embodiment 2

[0061] A high-performance copper chromium CuCr30 contact material is composed of the following components by weight: Cr is about 30%, and the balance is Cu; the raw materials are respectively 50-300 micron Cr powder and 300 micron Cu powder. The chromium powder is electrolytic chromium powder or thermite reduced chromium powder, and the copper powder is electrolytic copper powder or atomized copper powder. The purity of the chromium powder is 99.3%-99.98%.

[0062] The preparation method of described high-performance copper chromium CuCr30 contact material comprises the following steps:

[0063] (1) Raw material selection

[0064] Select 50-300 micron electrolytic chromium powder or thermite reduced chromium powder and electrolytic copper powder or atomized copper powder below 300 microns;

[0065] (2) mixed powder

[0066] By Cu powder: Cr powder is about 7: 3 weight ratio, and by the mixed powder of Cu powder and Cr powder: the weight ratio of copper ball=1: 1 carries out...

Embodiment 3

[0083] A high-performance copper chromium CuCr50 contact material is composed of the following components by weight percentage: Cr is about 50%, and the balance is Cu; the raw materials are Cr powder with a micron of 50-300 microns and Cu powder with a micron of less than 300 microns. The chromium powder is electrolytic chromium powder or thermite reduced chromium powder, and the copper powder is electrolytic copper powder or atomized copper powder. The purity of the chromium powder is 99.3%-99.98%.

[0084] The preparation method of described high-performance copper chromium CuCr50 contact material comprises the following steps:

[0085] (1) Raw material selection

[0086] Select 50-300 micron electrolytic chromium powder or thermite reduced chromium powder and electrolytic copper powder or atomized copper powder below 300 microns;

[0087] (2) mixed powder

[0088] By Cu powder: Cr powder is about 1: 1 weight ratio, and by the mixed powder of Cu powder and Cr powder: the ...

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Abstract

The invention relates to a high-performance copper chromium contactor material and a preparing method thereof. The copper chromium contactor material is composed of, by weight, 10-50% of Cr and the balance Cu. The preparing method of the copper chromium contactor material comprises the steps of raw material selecting, powder mixing, cold isostatic pressing, vacuum covering, heating and hot extruding. According to the high-performance copper chromium contactor material and the preparing method thereof, the special covering, heating and extruding technology is adopted, so that the special requirement for a press and a die by a large-specification contactor and high Cr content in the cold pressing process is greatly lowered, and mass production can be carried out through existing conventional equipment; furthermore, by means of high-temperature extruding, powder can be densified as much as possible in the solid phase, and air holes in texture can be reduced and even eliminated. The prepared high-performance copper chromium contactor material is used in a middle-high pressure vacuum circuit breaker, due to the fact that the contactor material prepared through the technology has the beneficial effects of being high in density and even in texture, the issues that in an existing technology, electric conductivity and heat conductivity are poor, and the air releasing amount is large can be easily relieved, and meanwhile good melting-welding resistance is maintained.

Description

technical field [0001] The invention relates to a high-performance copper-chromium contact material and a preparation method thereof, belonging to the field of metal-based composite materials. Background technique [0002] Contact materials are widely used in automatic switches, large-capacity circuit breakers, molded case circuit breakers and other switches. Common contact materials are Ag-WC-C, which mainly utilizes the good electrical and thermal conductivity of Ag, the high melting point, high hardness and good wear resistance of WC, can withstand strong arc corrosion, and has good resistance to corrosion. Weldability and abrasion resistance. The contact material generally adopts the method of powder metallurgy, and the silver powder, WC powder and additives are directly pressed in the mold. There are defects in the electrical contact material, its structure is uneven, its density is poor, and it is not resistant to arc erosion. [0003] Appropriate addition of elemen...

Claims

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Application Information

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IPC IPC(8): C22C1/04C22C9/00B22F1/00
Inventor 王小军刘凯师晓云王文斌李刚郭创立黄帆
Owner SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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