Copper-aluminium-base electric contact composite material

A composite material and electric contact technology, applied in contacts, circuits, electric switches, etc., can solve the problems of high price and cost reduction of copper and rare earth materials, and achieve improved oxidation resistance, electrical performance, and wear resistance good performance effect

Inactive Publication Date: 2010-04-28
李浩
View PDF1 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the high price of copper and rare earth materials, the cost of the above-mentioned patented materials has not been directly reduced

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh the raw materials in the following weight percentages: 55% copper, 35% aluminum, 6% silver, 2% tin, 1% boron carbide, 1% lanthanum-rich mixed rare earth, mix lanthanum-rich mixed rare earth with some copper powder to make 300 Mesh, the mixed rare earth-copper powder that weight ratio is 1: 10; Then above-mentioned mixed rare earth-copper powder, and aluminum powder, tin powder, remaining copper powder are ball-milled and mixed for 8 hours, then the particle size is 300 mesh boron carbide powder Add it to the powder after ball milling for mechanical powder mixing. The material balls used in the ball mill are agate balls of 6mm and 8mm, and the ratio of ball to material is 15:1.

[0019] The above-mentioned uniformly mixed powder is cold-pressed, the pressure is 800MPa, and the holding time is 6 minutes; the cold-pressed part is 3 Sintering under gas protection, the sintering temperature is 800°C, and the holding time is 4 hours; the specimen is subjected to second...

Embodiment 2

[0022] Weigh the following raw materials in weight percentage: 60% copper, 28% aluminum, 8% silver, 2% tin, 1.9% boron carbide, 0.1% lanthanum-rich mixed rare earth, and mix lanthanum-rich mixed rare earth with some copper powder to make 300 mesh, mixed rare earth-copper powder with a weight ratio of 1:10; then mix the above-mentioned mixed rare earth-copper powder, aluminum powder, tin powder, and remaining copper powder by ball milling for 8 hours, and then boron carbide with a particle size of 300 mesh The powder is added to the powder after ball milling for mechanical powder mixing. The material balls used in the ball mill are agate balls of 6mm and 8mm, and the ratio of ball to material is 15:1.

[0023] The above-mentioned uniformly mixed powder is cold-pressed, the pressure is 600MPa, and the holding time is 10 minutes; the cold-pressed part is 3 Sintering under gas protection, the sintering temperature is 900°C, and the holding time is 5 hours; the test piece is subje...

Embodiment 3

[0026] Weigh the following raw materials in weight percentage: 55% copper, 30% aluminum, 8% silver, 4% tin, 2.5% boron carbide, 0.5% lanthanum-rich mixed rare earth, and mix lanthanum-rich mixed rare earth with some copper powder to make 300 mesh, mixed rare earth-copper powder with a weight ratio of 1:10, and then mixed the above-mentioned mixed rare earth-copper powder, aluminum powder, tin powder, and the remaining copper powder by ball milling for 8 hours, and then boron carbide with a particle size of 300 mesh The powder is added to the powder after ball milling for mechanical powder mixing. The material balls used in the ball mill are agate balls of 6mm and 8mm, and the ratio of ball to material is 15:1.

[0027] The above-mentioned uniformly mixed powder is cold-pressed, the pressure is 800MPa, and the holding time is 8 minutes; the cold-pressed part is 3 Sintering under the protection of gas, the sintering temperature is 800°C, and the holding time is 4 hours; the tes...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
electrical resistivityaaaaaaaaaa
electrical resistivityaaaaaaaaaa
electrical resistivityaaaaaaaaaa
Login to view more

Abstract

The invention discloses a copper-aluminium-base electric contact composite material. The preparation method comprises the following steps: weighing the following raw materials in percentage by weight: 50-65% of copper, 25-40% of aluminium, 5-10% of silver, 1-5% of tin, 1-3% of boron carbide and 0.05-1% of lanthanum-rich or cerium-rich mixed rare earth; making the mixed rare earth and the copper into mixed-rare-earth-copper powder; mixing the copper powder, the aluminium powder and the tin powder in a ball mill mode; and cold-press-molding the powder, sintering, secondary molding, secondary sintering, and cooling to prepare the copper-aluminium-base electric contact composite material blank. The invention selects copper and aluminium as the base; copper and aluminium have the advantages of low price and abundant resources; and the electric conductivity, the heat conductivity, the fusion welding resistance, the current erosion and the frictional characteristic of the copper and the aluminium meet the requirements for electric contact material bases. The copper-aluminium-base electric contact composite material of the invention has the advantages of strong fusion welding resistance, favorable oxidation resistance and favorable wear resistance, thereby being a low-price substitute for silver alloy electric contacts which are frequently used in low-voltage and medium-voltage switches.

Description

technical field [0001] The invention relates to an electrical contact composite material used for medium and low-voltage electrical switches, in particular to a copper-aluminum base electrical contact composite material. Background technique [0002] The weak current contact element is a key part of the instrument, which plays an important role in the life and reliability of the instrument. In order to ensure the reliability of the weak current contact, precious metal silver and its alloy materials are widely used at home and abroad. In recent years, in order to reduce the loss of silver metal, people are constantly seeking new ways of saving and replacing silver. [0003] The Chinese patent application No. 2007100165042 discloses a weak current copper-based electrical contact composite material and its preparation method, which uses copper-based as the basic material. By adding a certain amount of rare earth materials and other materials to the copper-based material to imp...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/01C22C1/05H01H1/025H01H11/04
Inventor 张运林
Owner 李浩
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap