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Silver-nickel composite electrical contact material with nickel distributed in net-shaped mode, and preparation method thereof

A technology of electric contact material and mesh, applied in the direction of cable/conductor manufacturing, contacts, circuits, etc., to achieve high tap density, short process flow, and easy-to-obtain raw materials

Inactive Publication Date: 2014-08-20
NORTHEASTERN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using this method to use the nickel-coated silver particle composite powder as the raw material, in the silver-nickel composite material ingot prepared, the nickel is distributed in the silver matrix in a continuous network shape, and it is subjected to extrusion, drawing and other shaping processes. In the obtained silver-nickel composite electrical contact material, the nickel is elongated along the direction of plastic deformation, forming continuous fibers and distributed in the silver matrix. This method has never been reported.

Method used

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  • Silver-nickel composite electrical contact material with nickel distributed in net-shaped mode, and preparation method thereof
  • Silver-nickel composite electrical contact material with nickel distributed in net-shaped mode, and preparation method thereof
  • Silver-nickel composite electrical contact material with nickel distributed in net-shaped mode, and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0020] The silver-nickel composite electrical contact material with nickel network distribution, the nickel is distributed in the silver matrix in a continuous network, and the mass content of each component in the silver-nickel composite electrical contact material is: silver: 50%; nickel: 50%.

[0021] The preparation method of the silver-nickel composite electrical contact material of the nickel mesh distribution of the present embodiment is as follows:

[0022] Step 1: Preparation of silver particles by dry granulation method: put the silver powder into a steel mold, press it into a green body under a pressure of 20 MPa, then crush and sieve to obtain silver particles with a particle size range of 250-550 μm, and transfer the silver particles into Muffle furnace annealing, annealing temperature 300 ° C, annealing time 3 hours, cooling with the furnace;

[0023] Step 2: taking silver particles and nickel powder with an average particle size of 0.1 μm by mass content;

[00...

Embodiment 2

[0028] The silver-nickel composite electrical contact material with nickel network distribution, the nickel is distributed in the silver matrix in a continuous network, and the mass content of each component in the silver-nickel composite electrical contact material is: silver: 50%; nickel: 50%.

[0029] The preparation method of the silver-nickel composite electrical contact material of the nickel mesh distribution of the present embodiment is as follows:

[0030] Step 1: Prepare silver particles by wet granulation method: spray water into the silver powder, the amount of water is 0.4% of the total mass of the silver powder, to make the surface wet, after the particles are agglomerated, sieve and dry, the drying temperature 40°C, drying time 4 hours, prepare silver particles with a particle size range of 180-250 μm, transfer the silver particles to a muffle furnace for annealing, annealing temperature 300°C, annealing time 6 hours, and cool with the furnace;

[0031] Step 2: ...

Embodiment 3

[0035] The silver-nickel composite electrical contact material with nickel network distribution, the nickel is distributed in the silver matrix in a continuous network, and the mass content of each component in the silver-nickel composite electrical contact material is: silver: 75%; nickel: 25%.

[0036] The preparation method of the silver-nickel composite electrical contact material of the nickel mesh distribution of the present embodiment is as follows:

[0037] Step 1: Preparation of silver particles by dry granulation method: put the silver powder into a steel mold, press it into a green body under a pressure of 26 MPa, then crush and sieve to obtain silver particles with a particle size range of 550-830 μm, and transfer the silver particles into Muffle furnace annealing, annealing temperature 500 ° C, annealing time 1 hour, cooling with the furnace;

[0038] Step 2: taking silver particles and nickel powder with an average particle size of 48 μm by mass content;

[0039...

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Abstract

The invention discloses a silver-nickel composite electrical contact material with nickel distributed in a net-shaped mode, and a preparation method of the silver-nickel composite electrical contact material, and belongs to the field of composite electrical contact materials. According to the silver-nickel composite electrical contact material with the nickel distributed in the net-shaped mode, the nickel is distributed in a silver base body in a continuous net-shaped mode. The silver-nickel composite electrical contact material is composed of, by mass, 50% to 98% of silver and 2% to 50% of nickel. The preparation method includes the steps of obtaining silver particles through a particle manufacturing method, annealing the silver particles, coating the surfaces of the silver particles with nickel powder through adhesives after weighing the material to obtain nickel-coated silver particle composite powder bodies, and obtaining the silver-nickel composite electrical contact material with the nickel distributed in the net-shaped mode through sintering and forming. In a silver-nickel composite material ingot blank, the pure silver areas are large and evenly distributed, the nickel is distributed in the continuous net-shaped mode, and the nickel is lengthened according to deformation of the silver base body after plastic working and distributed in the direction parallel to the pulling direction in a fibriform mode; the silver-nickel composite electrical contact material is high in conductivity, good in arc erosion resistance, easy to operate, short in technological procedure, low in energy consumption and suitable for industrial production, and raw materials can be easily obtained.

Description

technical field [0001] The invention belongs to the field of composite electrical contact materials, in particular to a silver-nickel composite electrical contact material with nickel mesh distribution and a preparation method thereof. Background technique [0002] Electric contacts, referred to as contacts or contacts, are contact elements of electrical switches, instruments and meters, etc., and are responsible for connecting, carrying and breaking circuits and load currents. They are an indispensable link in all power electronic circuits. Performance directly affects the safe and reliable operation of switching appliances, and plays a decisive role in the service life and reliability of electrical appliances. The silver-nickel composite electrical contact material has good electrical and thermal conductivity, low and stable contact resistance, excellent corrosion resistance, and is easy to process. It can be directly welded on the copper base to achieve the purpose of sav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/02H01B13/00H01H1/023H01H11/04
Inventor 孙旭东林智杰刘绍宏杨瑞陈家林谢明刘满门陈永泰王塞北霍地李继光李晓东张牧朱琦
Owner NORTHEASTERN UNIV
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