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High-voltage tungsten-base composite contact material and method for making same

A composite contact and manufacturing method technology, applied in the direction of contacts, electrical components, electrical switches, etc., can solve the problems of breaking capacity of electrical contacts, resistance to electric corrosion and welding, insufficient cut-off current, corrosion pits, etc. Achieve excellent anti-welding performance, reduce calorific value and low production cost

Inactive Publication Date: 2011-11-09
SHANGHAI DIANKE ELECTRICAL MATERIAL CO LTD
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AI Technical Summary

Problems solved by technology

The traditional high-voltage tungsten-copper electrical contact material, under the action of high voltage and high current, arc ablation will cause serious corrosion pits on the surface of the contact and cause premature failure. Anti-welding ability, cut-off current and other aspects have been slightly insufficient

Method used

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  • High-voltage tungsten-base composite contact material and method for making same
  • High-voltage tungsten-base composite contact material and method for making same

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Embodiment Construction

[0017] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific diagrams.

[0018] refer to figure 1 , a method for manufacturing a tungsten-based high-voltage composite contact material, comprising the following steps: Mixing process 1: firstly, using a ball milling process to put tungsten powder and activated nickel into a ball mill for ball milling to obtain alloy powder, and then mix in the alloy powder Add a small amount of copper powder for mixing, and add a binder to make a mixed powder; pressing process 2: put the mixed powder into a mold, press and shape to obtain a green compact; infiltration sintering process 3: put the green compact under high temperature protection Pre-sintering is carried out in the atmosphere sintering furnace to form a porous skeleton; under the condition of high temperature and protective at...

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Abstract

The invention relates to the technical field of electrical contact materials, in particular to a tungsten-base electrical contact material and a method for making the same. The high-voltage tungsten-base composite contact material comprises a tungsten substrate, wherein the tungsten substrate comprises nickel, copper and a caking agent, and the copper is infiltrated into the tungsten substrate. The method for making the high-pressure tungsten-base contact material comprises the following the steps of: 1, mixing, namely ball-milling and refining tungsten powder and activated nickel to obtain alloy powder, doping copper powder into the alloy powder and mixing, and adding the caking agent to obtain mixed powder; 2, pressing, namely placing the mixed powder in a mould, and pressing to obtain a press blank; and 3, infiltrating and sintering, namely placing the press blank in a sintering furnace for pre-sintering to form a skeleton, forming pores under the conditions of high temperature and protective atmosphere, melting the copper and casting on the skeleton, and infiltrating into the skeleton. The high-pressure tungsten-base composite contact material produced by the method has the advantages of high electric conduction performance, good heat conduction performance, high corrosion resistance, strong fusion welding resistance and the like.

Description

technical field [0001] The invention relates to the technical field of electrical contact materials, in particular to a tungsten-based electrical contact material and a manufacturing method. Background technique [0002] The electrical contact is the core component of the electrical switch, and is the key factor affecting the on-off capability and reliability of the electrical switch. Its performance directly affects the reliability and stability of the electrical switch. Therefore, the electrical switch requires the electrical contact material to have good Electrical conductivity, good thermal conductivity, low and stable contact resistance, high corrosion resistance, strong resistance to fusion welding, etc. [0003] Tungsten-based materials are mostly used in the production of existing electrical contacts, and most of the existing tungsten-based materials are composed of tungsten, copper and tungsten carbide. It has the characteristics of high breaking capacity, good res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H1/021H01H1/029
Inventor 大场友树蒋荣清徐斌
Owner SHANGHAI DIANKE ELECTRICAL MATERIAL CO LTD
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