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Cu/Ag low-voltage contact material with longitudinal composite structure

A contact material and composite structure technology, applied in contact materials, contacts, electrical components, etc., can solve the problems of high contact resistance, copper base contact temperature rise, contact resistance increase, etc., and achieve high oxidation resistance. performance, high resistance to arc erosion and fusion welding, and good electrical and thermal conductivity

Inactive Publication Date: 2013-08-14
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to greatly reduce the silver content in the pressure contact and solve the problems of the existing copper-based contacts with high temperature and high contact resistance, the purpose of the present invention is to provide a copper / silver low-voltage silver contact with a longitudinal composite structure Under the long-term repeated action of arc, this new type of contact can always have a continuous conductive channel, which fundamentally solves the problem of increased contact resistance and temperature rise after arcing on the surface of copper-based contacts and significantly improves the silver-based Welding resistance and electrical life of contacts

Method used

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  • Cu/Ag low-voltage contact material with longitudinal composite structure
  • Cu/Ag low-voltage contact material with longitudinal composite structure

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Embodiment 1

[0017] A cylindrical copper / silver low-voltage contact material with a diameter of 8-12 mm and a thickness of 1.5-2.5 mm and a longitudinal composite structure, the copper-based material contains 0.05-0.2% lanthanum and 1.5-3% diamond , the rest is pure copper; the silver-based material is distributed in the copper alloy matrix material in a cylindrical strip in the longitudinal direction. On the cross-section of the contact, the silver-based material is a circle with a diameter of 3-4.8 mm. The area range of the silver-based material is 14-16%, and the composition of the silver-based material is 10-15% by mass of tin oxide, and the rest is pure silver.

Embodiment 2

[0019] A copper / silver low-voltage contact material with a longitudinal composite structure in the shape of a cuboid with a short side length of 4-6 mm, a long side length of 5-7 mm, and a thickness of 1.5-2.5 mm. The copper-based material contains 0.05- 0.2% lanthanum, 1.5-3% graphite, and the rest are pure copper; the silver-based material is distributed in the copper alloy matrix material in the longitudinal direction in two cylindrical strips, and on the cross-section of the contact, the silver-based material is in two 1 mm apart The circle is distributed in the center of the rectangular copper alloy base material, the diameter of the circle is 1.1-2.3 mm, the area of ​​the contact surface is 9-11%, and the composition of the silver-based material is 30-30% by mass. 60% tungsten, the rest is pure silver.

Embodiment 3

[0021] A copper / silver low-voltage contact material with a longitudinal composite structure in the shape of a cuboid with a short side length of 4-6 mm, a long side length of 5-7 mm, and a thickness of 1.5-2.5 mm. The copper-based material contains 0.05- 0.2% lanthanum, 1.5-3% graphite, and the rest are pure copper; the silver-based material is distributed in the copper alloy matrix material in the longitudinal direction in a rectangular strip, and on the contact cross-section, the silver-based material is in the same strip as the copper matrix A rectangle with a long side length but a short side length of 0.5-0.7mm is distributed in the center of the rectangular copper alloy base material, occupying an area of ​​9-11% of the contact surface, and the composition of the silver-based material contains a mass percentage of 30-60% tungsten carbide, the rest is pure silver.

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Abstract

The invention relates to a Cu / Ag low-voltage contact material with longitudinal composite structure, wherein Cu alloy is taken as material matrix, and Ag-base material is distributed in the Cu alloy matrix along the longitudinal direction in at least one strip shape; and the area of the Ag-base material accounts for 2-25% of the contact surface of the contact material, and the Cu alloy matrix material accounts for 75-98% of the contact surface of the contact material. The material can maintain the stability of electric contact in the repeated arc burning process, and has low contact resistance and temperature rise; and compared with the conventional Ag-base electric contact material, the Cu / Ag low-voltage contact material remarkably reduces the using quantity of the precious metal Ag, andhas higher economic value.

Description

technical field [0001] The invention relates to a low-voltage switch electrical contact material, in particular to a copper / silver low-voltage contact material with a longitudinal composite structure. 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, silver-based electrical contact materials are mainly used in low-voltage switching appliances. Silver is a scarce precious metal, and the development of a silver-saving electrical contact material with a new structure has great economic significance and scientific value. [0003] In the previous work, people have carried out research on replacing silver-based electrical contact materials with copper, and foun...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H1/04H01H1/023H01H1/0233H01H1/025
Inventor 王亚平李海燕
Owner XI AN JIAOTONG UNIV