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Silver-copper-rare earth composite material

A composite material and rare earth technology, which is applied in current collectors, electrical components, rotating current collectors, etc., can solve the problems of wear resistance and service life reduction, segregation of silver-copper alloys, and unstable contact resistance, etc., to achieve service life long, suppress temperature rise, and improve production efficiency

Inactive Publication Date: 2010-02-10
KUNMING INST OF PRECIOUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Due to the toxicity of Cd, AgCd / Cu has been phased out gradually. In high temperature, high humidity and atmosphere containing sulfur and hydrogen sulfide, non-conductive sulfide and oxide film are easily formed on the surface of AgCu / Cu, which will cause unstable contact resistance and reduce reliability. At the same time, its hardness and wear resistance are also low. Silver-copper alloys have a tendency to segregate. Adding appropriate Ni to form an AgCuNi alloy can significantly reduce its segregation, and adding appropriate Zn to form an AgCuZnNi alloy can improve its wear resistance and Corrosion resistance, but the electrical life of this type of composite material is insufficient, especially when used at a higher temperature, the wear resistance and service life are reduced

Method used

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  • Silver-copper-rare earth composite material
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Embodiment Construction

[0013] like figure 1 , the present invention comprises a copper layer, a silver alloy layer embedded and compounded on the copper layer, characterized in that the silver alloy layer contains 3-8% Cu, 0.2-0.8% Sn, 0.2-0.8% Ce, and the balance is Ag silver alloy. The silver alloy layer (1) is embedded and compounded on part of the surface of the copper layer (2).

[0014] Preparation method is: will contain 6.00% Cu, 0.50% Sn, 0.50% Ce, the balance is Ag's silver alloy strip material (as embodiment 1 in table 1) is embedded on the copper alloy strip material and cut out its thickness The AgCuSnCe / Cu composite material was prepared by using room temperature rolling composite four-step process in a groove with a moderate width, that is, surface treatment-rolling composite-diffusion annealing-precision rolling.

[0015] The AgCuSnCe / Cu composite material of the present invention is paired with the AgPd30 / Cu brush material and assembled on the micro-motor, and the durability test ...

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Abstract

The invention discloses a silver-copper-rare earth composite material used for manufacturing micromotor commutator components, comprising a copper layer and a silver alloy layer inlaid and compoundedon the copper layer. The composite material is characterized in that the silver alloy layer is silver alloy containing 3-8% of Cu, 0.2-0.8% of Sn, 0.2-0.8% of Ce and the balance Ag. The silver alloy layer (1) is inlaid and compounded on part of the surface of the copper layer (2). The material features excellent abrasion resistance, arc ablation resistance, welding resistance, sulfurization resistance and metal transfer resistance, and low and stable contact resistance. The micromotor commutator components manufactured by the material are suitable for the manufacturing industries of audio-visual electronic equipment, office automation equipment, communication equipment, automobiles and household appliances and for such electronic devices as electronic toys, etc.

Description

technical field [0001] The invention relates to an electrical contact composite material, in particular to an environment-friendly composite conductive material for developing a micro-motor commutator. Background technique [0002] DC micromotor is an indispensable electronic device in the manufacturing of audio-visual electronic equipment, office automation equipment, communication equipment, automobiles and home appliances. The DC micro-motor uses a three-pole commutator to slide in contact with the brushes to realize power transmission and maintain the motor running. The working conditions of the commutator and brushes have a decisive influence on the stability and service life of the motor. [0003] In the late 20th century, the advent and mass production of precious metal composite materials brought fundamental changes to the commutator materials of micro-motors. Replace a single metal or alloy with the combination of the excellent electrical contact performance of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01R39/20C22C5/06C22C5/08
Inventor 王健周世平卢绍平王光庆朱勇毛端顾彬
Owner KUNMING INST OF PRECIOUS METALS
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