Method for processing surface of CuCr contact material for vacuum arc-extinguishing chamber

A vacuum interrupter and contact material technology, applied in the field of metal materials, to achieve the effects of improving electrical performance, saving energy and raw material consumption, breaking capacity and service life

Inactive Publication Date: 2014-10-29
SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No one has so far treated CuCr alloy contact materials by using electron beam surface strengthening methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for treating the surface of a CuCr contact material for a vacuum interrupter, comprising the following steps:

[0022] (1) To prepare the CuCr contact material, the metal Cr is first processed into Cr powder by grinding and crushing under the protection of low-temperature liquid; the obtained Cr powder is sintered to make Cr powder blank after pressing, and the sintering temperature is 1325 ℃; the Cu block and the Cr powder billet were put into a vacuum furnace for vacuum induction melting to obtain a CuCr electrical contact material; the weight percentage of Cr in the CuCr electrical contact material was 25%.

[0023] (2) cleaning the prepared CuCr contact material, placing the CuCr electrical contact material in a tank filled with a hydrocarbon cleaning agent for ultrasonic cleaning, and then putting it into a tank filled with alcohol for secondary cleaning; After the cleaning is completed, the CuCr electrical contact material is sent to the drying tunnel for...

Embodiment 2

[0028] A method for treating the surface of a CuCr contact material for a vacuum interrupter, comprising the following steps:

[0029] (1) To prepare the CuCr contact material, first process the metal Cr under the protection of low-temperature liquid and process it into Cr powder through a grinding crusher; put the Cr powder and copper rod into a vacuum sintering furnace for vacuum infiltration to obtain a CuCr contact material. Contact material; the weight percentage of Cr in the CuCr electric contact material is 50%.

[0030] (2) cleaning the prepared CuCr contact material, placing the CuCr electrical contact material in a tank filled with a hydrocarbon cleaning agent for ultrasonic cleaning, and then putting it into a tank filled with alcohol for secondary cleaning; After the cleaning is completed, the CuCr electrical contact material is sent to the drying tunnel for hot air drying.

[0031] (3) Place the dried CuCr contact material in the vacuum chamber of the electron be...

Embodiment 3

[0035] A method for treating the surface of a CuCr contact material for a vacuum interrupter, comprising the following steps:

[0036] (1) To prepare CuCr contact material, metal Cr is first processed into Cr powder by grinding and crushing machine under the protection of low-temperature liquid; the obtained Cr powder is sintered to make Cr powder blank after pressing, and the sintering temperature is 1320°C ℃; the Cu block and the Cr powder billet were put into a vacuum furnace for vacuum induction melting to obtain a CuCr electrical contact material; the weight percentage of Cr in the CuCr electrical contact material was 30%.

[0037] (2) cleaning the prepared CuCr contact material, placing the CuCr electrical contact material in a tank filled with a hydrocarbon cleaning agent for ultrasonic cleaning, and then putting it into a tank filled with alcohol for secondary cleaning; After the cleaning is completed, the CuCr electrical contact material is sent to the drying tunnel f...

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Abstract

The invention provides a method for processing the surface of a CuCr contact material for a vacuum arc-extinguishing chamber. The contact material is subjected to machine processing, washing and drying, the material surface is scanned by adopting a high-energy electron beam to obtain an electron beam remelting layer with thickness being about 100 mu m, and the size of the Cr particles in the remelting layer is less than 1mu m. The electron beam scanning process is performed in a vacuum environment, the vacuum degree is less than 0.1Pa, the electron beam scanning frequency is 350-450HZ, the voltage is 55-65KV, and the current is 60-70mA. After the electron beam scanning, the crystalline grains on the surface of the contact material are remarkably refined, so that the physical mechanical performance and electric performance of the contact material can be improved to a great extent.

Description

technical field [0001] The invention relates to a surface treatment method for a CuCr contact material used in a vacuum interrupter, belonging to the technical field of metal materials. Background technique [0002] Because vacuum circuit breakers have excellent performances such as high reliability and long life, they are favored by the market. One of its remarkable technical features is that the traditional air arc extinguishing grid is replaced by a vacuum interrupter, which improves the circuit breaker shutdown. The ability and number of times to make and break the short-circuit current, and the electrical life is as high as ten thousand times. [0003] The ability of the vacuum interrupter to break and close the short-circuit current, in addition to the mechanical parameters that need to be matched with it, mainly depends on the material and magnetic field structure of the contacts of the interrupter. CuCr alloy material is a good long-life vacuum contact material. It ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D10/00
Inventor 王小军王文斌李刚艾璇杨平
Owner SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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