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Special powder copper alloy electric contact material and method for making same

A technology of electric contact material and copper alloy, which is applied in the direction of contacts, circuits, electric switches, etc., can solve the problems of sudden rise in temperature of the contact surface, failure of electric contacts, and difficulty in conducting electricity.

Active Publication Date: 2008-03-19
SHANGHAI LONGSUN ALLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When copper is used as an electrical contact material, under the action of contact resistance and arc, the temperature of the contact surface rises sharply, and the cuprous oxide on the contact surface is converted into copper oxide (CuO), forming an oxide film that is not easy to conduct electricity. resulting in electrical contact failure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Rare Earth 0.1%,

[0028] Boron 0.01%,

[0029] Aluminum 0.1%,

[0030] Silver 0.1%,

[0031] Conductive Ceramic 0.2%,

[0032] Diamond powder 0.2%,

[0033] The balance is copper and unavoidable impurities.

Embodiment 2

[0035] Rare Earth 1%,

[0036] Boron 0.1%,

[0037] Aluminum 1%,

[0038] Silver 1%,

[0039] Conductive Ceramic 2%,

[0040] Diamond powder 2%,

[0041] The balance is copper and unavoidable impurities.

Embodiment 3

[0043] Rare Earth 0.5%,

[0044] Boron 0.05%,

[0045] Aluminum 0.5%,

[0046] Silver 0.5%,

[0047] Conductive Ceramic 1%,

[0048] Diamond powder 1%,

[0049] The balance is copper and unavoidable impurities.

[0050] The manufacturing process flow of the special powder copper alloy electric contact material of the present invention is as follows:

[0051] 1) Milling:

[0052] ——Copper powder: Melt T2 copper in an intermediate frequency induction furnace first, then add rare earth, boron, silver and aluminum in proportion to smelt it into copper alloy, and then atomize the copper alloy melt into powder on high-pressure centrifugal atomization equipment, and then The powder is reduced with hydrogen at 300°C to 600°C, and the average particle size of the powder is 0.1 μm to 10 μm.

[0053] ——Diamond powder: commercially available diamond powder, with an average particle size of 0.1 μm to 10 μm.

[0054] ——Conductive ceramic powder: commercially available, with an avera...

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Abstract

The invention provides a method for producing Cu alloy electrical contact material with good antioxidant property. The alloy is composed of rare earth (at least one selected from La, Ce and Yt elements), boron, aluminum, silver, conductive ceramic (TiN2 and / or SnO2), diamond powder and copper. The alloy is processed by powdering, mechanical mixing, isostatic pressing, sintering, extrusion and shaping steps, to make various electrical contact elements. With the inventive method, the produced electrical contact element can overcome the disadvantage of poor antioxidant capability of the prior Cu alloy electrical contact elements, and can be used to replace the silver alloy electrical contact in the field of low-voltage electrical apparatuses, thereby solving the problems of the silver alloy electrical contact, such as high cost due to noble metal silver and bad influence on social sustainable development.

Description

technical field [0001] The invention relates to the technical field of manufacturing technology of electrical alloy materials, mainly the manufacture of copper alloy electrical contact materials. Background technique [0002] Copper alloys are usually manufactured by smelting or powder metallurgy methods, and copper alloy electrical contact materials for low-voltage electrical appliances are often manufactured by powder metallurgy methods. [0003] Copper has excellent electrical and thermal conductivity, second only to silver. At room temperature, the electrical conductivity of copper is 94% of that of silver, and its thermal conductivity is 73.2% of that of silver. However, copper is much cheaper than silver. Therefore, in electrical contact materials Replacing silver alloys with copper alloys can save precious metal silver, reduce product costs, and achieve sustainable social development. [0004] But copper has a big disadvantage, that is, the surface of copper is easil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H1/025H01H11/04
Inventor 郑元龙郑大受谢忠光
Owner SHANGHAI LONGSUN ALLOY CO LTD
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