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Preparation method of high-strength high-conductivity high-softening-temperature copper-clad dispersion copper conductive rod

A technology of softening temperature and dispersed copper, which is applied in the direction of conductive materials, conductive materials, cable/conductor manufacturing, etc., can solve the problems of affecting the mechanical life of vacuum switches, the change of vacuum switch contact opening distance, and the hardness reduction of oxygen-free copper materials. Achieve good electrical conductivity, increase softening temperature, and good brazing performance

Active Publication Date: 2018-03-30
SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, this problem cannot be solved well only by traditional alloying and dispersion strengthening.
[0005] The conductive rods used in traditional vacuum interrupters mainly use oxygen-free copper rods with a single component. The hardness index in the hard state is about 95HB, and after the vacuum interrupter is sealed, its hardness drops to about 40HB. During the closing process of a vacuum switch such as a circuit breaker, under the action of the closing force, the oxygen-free copper rod undergoes a thick deformation phenomenon under the action of the compressive force, which makes the indicators such as the opening distance of the vacuum switch contact change, which is serious. Affected the mechanical life of the vacuum switch
[0006] Dispersed copper has the characteristics of high strength, high conductivity, and high softening temperature. When it is used as a conductive rod material, its hardness index basically does not change after the arc extinguishing chamber is sealed, which can solve the problem of the hardness of oxygen-free copper materials. The problem of serious reduction, but dispersed copper itself has the disadvantage of poor brazing, which limits its use as a conductive rod material

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  • Preparation method of high-strength high-conductivity high-softening-temperature copper-clad dispersion copper conductive rod

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 Shown, a kind of preparation method of the copper-clad dispersed copper conducting rod of high strength, high conductance and high softening temperature comprises the following steps:

[0028] (1) Preparation of dispersed copper alloy powder: preparation of ceramic reinforcement phase Al by internal oxidation method 2 o 3 For dispersed copper alloy powder with a content of 0.2%, the content of the ceramic reinforcement phase is too low, and the reinforcement effect is not obvious; the content is too high, and the electrical conductivity is seriously affected;

[0029] (2) Cold isostatic pressing method to prepare the dispersed copper rod in the heart: put the dispersed copper alloy powder prepared in step (1) into the rubber sleeve and vibrate, the vibration time is 35s, then put the rubber sleeve into Inside the steel hoop, put them into an isostatic press together for pressing, the pressing pressure is 150MPa, and the holding time is 3min to obtain ...

Embodiment 2

[0037] Such as figure 1 Shown, a kind of preparation method of the copper-clad dispersed copper conducting rod of high strength, high conductance and high softening temperature comprises the following steps:

[0038] (1) Preparation of dispersed copper alloy powder: preparation of ceramic reinforcement phase Al by internal oxidation method 2 o 3 For the dispersed copper alloy powder with a content of 0.3%, the content of the ceramic reinforcement phase is too low, and the reinforcement effect is not obvious; the content is too high, and the electrical conductivity is seriously affected;

[0039] (2) Cold isostatic pressing method to prepare the dispersed copper rod in the heart: put the dispersed copper alloy powder prepared in step (1) into the rubber sleeve and vibrate, the vibration time is 45s, then put the rubber sleeve into Inside the steel hoop, put them into an isostatic press together for pressing, the pressing pressure is 220MPa, and the holding time is 6min to obt...

Embodiment 3

[0047] Such as figure 1 Shown, a kind of preparation method of the copper-clad dispersed copper conducting rod of high strength, high conductance and high softening temperature comprises the following steps:

[0048] (1) Preparation of dispersed copper alloy powder: preparation of ceramic reinforcement phase Al by internal oxidation method 2 o 3 For dispersed copper alloy powder with a content of 0.4%, the content of the ceramic reinforcement phase is too low, and the reinforcement effect is not obvious; the content is too high, and the electrical conductivity is seriously affected;

[0049] (2) Cold isostatic pressing method to prepare the core dispersed copper rod: put the dispersed copper alloy powder prepared in step (1) into the rubber sleeve and vibrate for 60s, then put the rubber sleeve into Inside the steel hoop, put them together in an isostatic press for pressing, the pressing pressure is 300MPa, and the holding time is 10min to obtain dispersed copper rods;

[0...

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Abstract

The invention relates to a preparation method of a high-strength high-conductivity high-softening-temperature copper-clad dispersion copper conductive rod, and specifically relates to the technical field of vacuum switch arc extinguish chamber conductive rod materials. The method comprises the following steps: 1) preparation of dispersion copper alloy powders; 2) preparation of a core dispersion copper rod through a cold isostatic pressing method, pressing pressure being 150-300 MPa, and pressure dwell time being 3-10 min; 3) vacuum sintering of the core dispersion copper rod, maximum sintering temperature being 800-1080 DEG C, temperature holding time being 30-240 min, and vacuum degree being larger than 5 pa; 4) preparation of an outer copper sleeve; 5) embedding the core dispersion copper rod into the outer copper sleeve and carrying out vacuum electron beam sealing; 6) extrusion, extrusion temperature being 600-1050 DEG C; and 7) cold drawing. The conductive rod has the advantagesof high strength, high conductivity, high softening temperature and good soldering performance and the like, and fully meets use requirements of the arc extinguishing chamber conductive rod.

Description

technical field [0001] The invention belongs to the technical field of conductive rod materials for arc extinguishing chambers for vacuum switches, and in particular relates to a method for preparing a copper-clad dispersed copper conductive rod with high strength, high conductivity and high softening temperature. Background technique [0002] With the continuous miniaturization of the vacuum interrupter, the size of the conductive rod used in the interrupter is also continuously reduced. Therefore, more stringent requirements are put forward for the strength, conductivity, and softening temperature of the conductive rod material. The traditional single-component oxygen-free copper conductive rod can no longer meet the requirements of use. Currently there are two main solutions: [0003] (1) Improve the strength by alloying, such as adding chromium, zirconium, etc., although the addition of these elements can improve its strength, but if the addition exceeds 3%, it will ser...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00H01B1/02C22C1/05C22C9/00
CPCC22C1/05C22C9/00H01B1/026H01B13/00
Inventor 周斌刘凯王小军师晓云李鹏张石松杨斌王文斌
Owner SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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