Alkali metal-containing silver-copper-nickel sliding electrical contact material

A sliding electrical contact, alkali metal technology, applied in the direction of metal/alloy conductors, circuits, connections, etc., can solve the problems that the service life of the alloy cannot fully meet the use requirements, the wear rate is fast, and the arc damage is large, and the cost is low. Material damage, reduced ablation effect

Active Publication Date: 2010-12-22
CHONGQING CHUANYI AUTOMATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it was found in use that these two alloys still have problems such as fast wear rate and large arc damage, especially as

Method used

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  • Alkali metal-containing silver-copper-nickel sliding electrical contact material
  • Alkali metal-containing silver-copper-nickel sliding electrical contact material
  • Alkali metal-containing silver-copper-nickel sliding electrical contact material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 39

[0046] The difference from Example 2 is that a layer of AuAg40 alloy with a thickness of about 1 μm is further compounded on the surface of the two-layer composite material, and then tested, and its service life is 1320 hours.

Embodiment 40

[0048] The difference from Example 8 is that a layer of AuAg40 alloy with a thickness of about 1 μm is further compounded on the surface of the two-layer composite material, and then tested, and its service life is 1372 hours.

Embodiment 41

[0050]The difference from Example 13 is that a layer of AuAg40 alloy with a thickness of about 1 μm is further compounded on the surface of the two-layer composite material, and then tested, and its service life is 1366 hours.

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PUM

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Abstract

The invention discloses an alkali metal-containing silver-copper-nickel sliding electrical contact material which is prepared by adding a small amount of alkali metal elements to AgCuNi and AgCuZnNi, wherein the additive amount (in mass by percentage) of alkali metal Li, Na and K is 0.01%-3.0%, the elements can be respectively and independently added, and two or three elements are added in a matching way , but the total additive amount of the elements can not be more than 3.0%. The alkali metal-containing silver-copper-nickel sliding electrical contact material has favorable self-lubricating performance and arc-extinguishing performance, and can improve the service life and the contact stability and reliability of direct-current motor commutators when used for making the direct-current motor commutators.

Description

technical field [0001] The invention relates to a silver-copper-nickel sliding electrical contact material, in particular to a silver-copper-nickel sliding electrical contact material containing a trace amount of alkali metal. Background technique [0002] The core components of a small DC motor are the commutator and brushes. The main load it bears during its work is the sliding friction under the load condition, but at the moment of current commutation, the commutator and brushes will be disconnected. There is a "closing and breaking" transformation. As the motor speed increases, the frequency of the "closing and breaking" transformation of the commutator and brush slices increases, resulting in arcing, and the electrical contact materials are therefore subjected to load friction and arc erosion. , electrical friction causes mechanical wear of materials, and arc erosion causes damages such as melting, splashing and welding of materials at high temperatures; at the same tim...

Claims

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Application Information

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IPC IPC(8): H01R39/20H01R39/04H01B1/02C22C5/08H02K13/00
Inventor 徐永红章应秦秀芳杨贤军
Owner CHONGQING CHUANYI AUTOMATION
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