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AgWC (wolfram carbide) electrical contact material and manufacturing method thereof

A technology of electrical contact materials, silver tungsten carbide, applied in contact materials, contacts, circuits, etc., can solve problems such as temperature rise, contact resistance increase, contact resistance instability, etc., and achieve low contact resistance , and the effect of stable contact resistance and low production cost

Inactive Publication Date: 2010-09-15
SHANGHAI DIANKE ELECTRICAL MATERIAL CO LTD
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Problems solved by technology

[0004] Silver tungsten series electrical contact materials are mainly used in high-current switches, which have good thermal and electrical conductivity, resistance to welding, and less mechanical wear and electrical corrosion than other materials, but tungsten is easily oxidized to WO 3 and WO 4 Increase the resistance of the contact and increase the temperature rise, and there is a disadvantage of unstable contact resistance during use

Method used

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  • AgWC (wolfram carbide) electrical contact material and manufacturing method thereof
  • AgWC (wolfram carbide) electrical contact material and manufacturing method thereof
  • AgWC (wolfram carbide) electrical contact material and manufacturing method thereof

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Embodiment Construction

[0023] 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.

[0024] refer to figure 1 and figure 2 , the manufacturing process of silver tungsten carbide electrical contact material, first use the powder mixing process 1 to obtain Ag and WC mixed powder that is uniformly mixed from raw material silver powder and tungsten carbide powder. Then use the powder compaction process 2 to compact the mixed powder into a compact 6 by molding according to the desired shape. Firstly, a mold is produced according to the requirement, and then the mixed powder of Ag and WC is molded by using the prepared mold to obtain the required powder blank 6 . Next, body surface treatment 3 is carried out, and colloidal graphite slurry is sprayed on the side of the powder body 6 that will produce silver tungsten carbide electrical co...

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Abstract

The invention relates to an AgWC (wolfram carbide) electrical contact material and a manufacturing method thereof, in particular to a silver-based electric contact material and a manufacturing method thereof, belonging to the technical field of electrical contact materials. A substrate of the AgWC electrical contact material is infiltrated with silver from upper surface to lower surface. The manufacturing method comprises the following steps of: obtaining Ag and WC mixed powder by applying a powder mixing process; pressing the mixed powder into a powder billet by applying a powder pressing process; then putting a prepared thin silver sheet on the powder billet by applying an infiltration sintering process, conveying into a heating furnace and heating, melting the silver sheet and infiltrating into the powder billet to further obtain an AgWC electric contact; and beautifying the surface of the AgWC electric contact by applying a polishing process. The AgWC electric contact manufactured by adopting the manufacturing process has favorable electric conduction performance and 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 for electrical engineering, in particular to a silver-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] The research on electrical contact materials has a history of nearly 100 years. At first, pure Ag, pure Au, pure Pt, etc. were used. After the 1960s, multiple noble metals and noble metal composite materials were developed. In the res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H1/0233H01H1/04H01H11/04B22F3/16
Inventor 大场友树张明轩吴婷
Owner SHANGHAI DIANKE ELECTRICAL MATERIAL CO LTD
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