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Low-silver, copper and lanthanum alloy for commutator and preparation method of low-silver, copper and lanthanum alloy

A commutator, silver-copper technology, applied in the field of high-quality copper alloy electrical materials and preparation, to achieve obvious market advantages and reduce material costs

Active Publication Date: 2015-05-20
JIANGXI KANGCHENG COPPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there have been no relevant patent reports using copper-lanthanum alloys containing low silver (Ag≤0.02%) as commutator materials

Method used

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  • Low-silver, copper and lanthanum alloy for commutator and preparation method of low-silver, copper and lanthanum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The low-silver copper-lanthanum alloy is configured according to the composition requirements of the present invention. A lanthanum-containing 30% copper-lanthanum master alloy is selected (considering the burnout rate of the master alloy is 10%); the selected cathode copper plate contains 99.95% copper. Weigh 99.58 kg of cathode copper plate, 0.02 kg of pure silver, and 0.45 kg of copper-lanthanum master alloy. When the power frequency induction furnace is heated up to 1140°C-1160°C, 90.18kg of electrolytic copper is added in turn, and pure silver is added after melting, and then 9.40kg of cathode copper plate inlaid with copper-lanthanum master alloy is pressed into the copper liquid; the surface of the copper liquid in the melting zone is Covered with charcoal, the casting area covered with graphite flakes. Repeat this until the liquid level in the furnace meets the requirements, stop feeding, remove slag, keep warm for about 1 hour, start continuous casting, and fe...

Embodiment 2

[0018] The low-silver copper-lanthanum alloy is configured according to the composition requirements of the present invention. A lanthanum-containing 30% copper-lanthanum master alloy is selected (considering the burnout rate of the master alloy is 10%); the selected cathode copper plate contains 99.95% copper. Weigh 99.28kg of cathode copper plate, 0.02kg of pure silver, and 0.74kg of copper-lanthanum master alloy. When the power frequency induction furnace heats up to 1140°C-1180°C, add 89.88kg of electrolytic copper in sequence, add pure silver after melting, and then press 9.40kg of cathode copper plate inlaid with copper-lanthanum master alloy into the copper liquid; the surface of the copper liquid in the melting zone Covered with charcoal, the casting area covered with graphite flakes. Repeat this until the liquid level in the furnace meets the requirements, stop feeding, remove slag, keep warm for about 1 hour, start continuous casting, and feed in time according to t...

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Abstract

The invention provides an excellent copper alloy electrical material, which is low in silver content and proper in rare earth, and is capable of replacing conventional copper and sliver alloy for a direct-current motor commutator, and a preparation method of the excellent copper alloy electrical material. According to low-silver electrical copper alloy containing rare earth, a rod blank is prepared by a special smelting technology, and is formed by conventional upward continuous casting, continuous extrusion and high-precision cold drawing methods; profiled bars with different model numbers and specifications for the commutator can be produced; the electric property and the mechanical property of the copper alloy electrical material are very close to those of conventional copper and silver alloy, and can reach the use requirements; the conventional silver and copper alloy can be replaced with the low-silver and copper alloy containing the rare earth; the low-silver and copper alloy is applied to manufacturing of commutators of a plurality of direct-current motors, and is significant in benefit and wide in application prospect.

Description

technical field [0001] The invention provides a high-quality copper alloy electrical material containing low amounts of silver and lanthanum that can replace conventional copper-silver alloys for a DC motor commutator and a preparation method thereof, belonging to the technical field of new materials. technical background [0002] A commutator is a class of parts used in motors and generators to convert and conduct current. Except for the squirrel-cage induction motor, other motors must use a commutator. Therefore, the quality of the commutator directly affects the performance of the motor, and it is an important part of the motor. DC micro motors are indispensable electronic devices in the manufacturing of office automation equipment, audio-visual electronic 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. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00B21C37/00
Inventor 徐恒雷杨卫良
Owner JIANGXI KANGCHENG COPPER CO LTD
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