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Preparation method for silver-based alloy contact material

A contact material and silver-based alloy technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of precious metal silver consumption, silver volatilization loss, and a large amount of surplus material, and achieve shortened heating time, low contact resistance, and contact The effect of resistance stabilization

Inactive Publication Date: 2018-06-12
LUOYANG SHENJIA KILN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these two processes must be heated at high temperature for a long time, resulting in the volatilization loss of silver, and sometimes through subsequent pressure processing processes such as extrusion, rolling, wire drawing, and riveting processes, resulting in a large amount of surplus material
The finished silver-based contacts need to use silver-based solder to be welded on the copper base. These processes consume a lot of precious metal silver, resulting in great waste

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0022] The preparation method of the present invention is as follows:

[0023] Silver powder, tungsten powder, nickel powder, copper powder, aluminum powder, and titanium carbide are prepared in parts by weight: 30-50 parts of silver powder, 10-20 parts of tungsten powder, 15-30 parts of nickel powder, 5-20 parts of copper powder, Mix 5-15 parts of aluminum powder and 20-30 parts of titanium carbide, and then mix them in 6×10 -3 Smelting is carried out under the vacuum degree of smelting. After smelting, the molten liquid is atomized to form powder, and the cooling rate of atomization is 10 5 -10 6 K / S; put the obtained powder into an oxidation furnace at 700-800°C and a pressure of 0.5-1MPa for internal oxidation treatment for 30-60min to obtain internally oxidized alloy powder; cool the obtained internally oxidized alloy powder Pressing, high-temperature sintering, re-pressing, extrusion, and drawing processes to make silver-based alloy contact materials.

[0024] Prefera...

Embodiment 1

[0027] Silver powder, tungsten powder, nickel powder, copper powder, aluminum powder, and titanium carbide in parts by weight are: 30 parts of silver powder, 15 parts of tungsten powder, 15 parts of nickel powder, 20 parts of copper powder, 5 parts of aluminum powder, and 25 parts of titanium carbide parts in proportion, then mix in 6 x 10 -3 Smelting is carried out under the vacuum degree of smelting. After smelting, the molten liquid is atomized to form powder, and the cooling rate of atomization is 10 5 K / S; put the obtained powder into an oxidation furnace at 800°C and 0.8 MPa for internal oxidation treatment for 50 minutes to obtain internally oxidized alloy powder; cold press the obtained internally oxidized alloy powder at a high temperature of 800°C Sintering for 90 minutes, repressing, extruding, and drawing processes to make silver-based alloy contact materials.

Embodiment 2

[0029] Silver powder, tungsten powder, nickel powder, copper powder, aluminum powder, and titanium carbide in parts by weight are: 50 parts of silver powder, 20 parts of tungsten powder, 30 parts of nickel powder, 5 parts of copper powder, 15 parts of aluminum powder, and 30 parts of titanium carbide parts in proportion, then mix in 6 x 10 -3 Smelting is carried out under the vacuum degree of smelting. After smelting, the molten liquid is atomized to form powder, and the cooling rate of atomization is 10 6 K / S; put the obtained powder into an oxidation furnace at 700°C and carry out an internal oxidation treatment at a pressure of 0.5MPa for 60 minutes to obtain an internally oxidized alloy powder; cold press the obtained internally oxidized alloy powder at a high temperature of 1000°C Sintering for 40 minutes, repressing, extruding, and drawing processes to make silver-based alloy contact materials.

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Abstract

The invention relates to a preparation method for a silver-based alloy contact material. Silver powder, tungsten powder, nickel powder, copper powder, aluminum powder and titanium carbide are mixed proportionally and them smelted in vacuum, and melted liquid is atomized into powder; the obtained powder is put into an oxidation furnace for internal oxidation treatment, and internally oxidized alloypowder is obtained; and the procedures of cold pressing, high temperature sintering, re-pressing, extruding and drawing of the internally oxidized alloy powder are conducted, and the silver-based alloy contact material is obtained. Through the method, the heating time of materials at a high temperature is greatly shortened, losses of silver materials are reduced, through internal oxidation, oxidephases are diffused and evenly distributed in matrix phases, the alloy reinforcement effect is achieved, meanwhile, through raw material optimization and matching, the oxide phases of the adopted rawmaterials can remarkably improve the electric resistance, fusion welding resistance and abrasion resistance of the alloy material, and the alloy material can be better applied to the field of electronic devices.

Description

technical field [0001] The invention relates to the technical field of alloy composite material preparation, in particular to a method for preparing a silver-based alloy contact material. Background technique [0002] The electrical contact material is a basic industrial component with a large quantity and a wide range. It is responsible for the task of connecting and disconnecting the electric control circuit and the load circuit current. Its material determines the breaking capacity of the switch and the reliability of the electrical contact. At present, an important type of contact material in low-voltage switchgear is silver-based alloy contact materials, including silver nickel, silver tungsten, silver tungsten carbide, silver graphite, etc. Silver is a scarce precious metal, and saving silver in the manufacturing process has important economic significance and scientific value for silver-based electrical contact materials. [0003] At present, the production of silver...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/02C22C32/00C22C1/05B22F1/00
CPCC22C1/05C22C5/06C22C30/02C22C32/0005B22F2998/10B22F1/145B22F3/16B22F9/082
Inventor 蔡泽
Owner LUOYANG SHENJIA KILN
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