Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Silver-nickel or silver-iron electric contact material and preparation method thereof

An electrical contact material, silver-iron technology, applied in contacts, circuits, electrical switches, etc., can solve the problems of high manufacturing cost, pollution, and high comprehensive cost, improve consistency and reliability, improve distribution uniformity, eliminate uneven distribution

Inactive Publication Date: 2020-06-19
ZHEJIANG FUDA ALLOY MATERIALS TECH CO LTD
View PDF10 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Patent ZL200610049919.5 discloses a silver-nickel electrical contact material powder prepared by "ball milling-co-precipitation method" and adding a small amount of rare earth elements with the assistance of a high-speed shear emulsifier to improve the comprehensive electrical properties of the product. The contact material manufacturing process combines the advantages of the ball milling process and the chemical co-deposition process to improve the bonding strength between silver and nickel and the added elements, but the silver-nickel electrical contact material prepared by this method, the difference between silver and nickel The combination is still mainly a physical combination, and the use of chemical co-deposition to prepare powder has serious pollution to the environment, and the cost of wastewater treatment is very high
[0006] Patent ZL201210296397.4 discloses a method of preparing silver-nickel electrical contact materials by chemical coating process. The surface of nickel powder is coated with a layer of transition elements to improve the wettability between silver and nickel, and then mixed with silver powder to form a mixed powder, which is processed into silver-nickel electrical contact materials by pressing and extruding. This preparation method has a long production cycle, and the waste water generated in the chemical coating process pollutes the environment seriously, and the overall cost is higher than that of the powder metallurgy process.
[0007] Patent ZL201610515153.9 discloses a preparation method of silver-nickel electrical contact material. The traditional powder metallurgy process is used to extrude silver-nickel into a strip, which is then sheared and crushed and then extruded into a strip with an ingot, and then sheared again. After crushing, the ingot is extruded into a strip and processed into a finished product. This processing method solves the phenomenon of uneven distribution of nickel particles in the silver matrix. However, due to the three-time extrusion process, the production cycle is long, the manufacturing cost is high, and the yield Low, not suitable for mass production

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Silver-nickel or silver-iron electric contact material and preparation method thereof
  • Silver-nickel or silver-iron electric contact material and preparation method thereof
  • Silver-nickel or silver-iron electric contact material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] a) 18kg silver is melted in the graphite crucible of intermediate frequency smelting furnace, forms silver melt;

[0037] b) 1.8 kg of carbonyl Ni powder with an average particle size of 0.1 μm and 0.2 kg of W powder with an average particle size of 2 μm are evenly mixed, loaded into the powder spraying device, and connected to the upper spray plate of the high-pressure water atomization equipment; The pressure of pure nitrogen is 0.2MPa, and the flow rate of inert gas is 200L / min;

[0038] c) The lower spray plate of the high-pressure water atomization equipment is connected to high-pressure water, the water pressure is set to 20MPa, and the atomization equipment is turned on;

[0039] d) The molten silver is poured into the collection bucket from the center of the spray plate of the high-pressure water atomization equipment through the heat preservation crucible, and the powder spraying device is turned on. With high-purity nitrogen as the carrier, the mixed powder of...

Embodiment 2

[0043] a) 20kg silver is melted in the graphite crucible of intermediate frequency smelting furnace, forms silver melt;

[0044] b) 4.5 kg of carbonyl Ni powder with an average particle size of 5 μm, 0.2 kg of WO with an average particle size of 1 μm 3 Powder, 0.3kg of Re powder with an average particle size of 10μm are mixed evenly, loaded into the powder spraying device, and connected to the upper spray plate of the high-pressure water atomization equipment; the pressure of high-purity argon in the powder spraying equipment is set to 1.0MPa, and the flow rate of the inert gas is 1000L / min;

[0045] c) The lower spray plate of the high-pressure water atomization equipment is connected to high-pressure water, the water pressure is set to 200MPa, and the atomization equipment is turned on;

[0046] d) The molten silver is poured into the collection bucket from the center of the spray plate of the high-pressure water atomization equipment through the heat preservation crucible,...

Embodiment 3

[0050] a) 8.8kg silver is melted in the graphite crucible of intermediate frequency smelting furnace to form silver melt;

[0051] b) 1 kg of carbonyl Fe powder with an average particle size of 20 μm, 0.1 kg of WC powder with an average particle size of 0.1 μm, 0.05 kg of VC powder with an average particle size of 3.5 μm, and 0.05 kg of MoC powder with an average particle size of 5 μm are mixed uniformly, and packed into a powder spraying device, And connected to the upper spray plate of the high-pressure water atomization equipment; set the high-purity argon pressure in the powder spray equipment to 0.5MPa, and the inert gas flow rate to 600L / min;

[0052] c) The lower spray plate of the high-pressure water atomization equipment is connected to high-pressure water, the water pressure is set to 100MPa, and the atomization equipment is turned on;

[0053] d) The silver melt is poured into the collection bucket from the center of the spray plate of the high-pressure water atomiz...

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
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a silver-nickel or silver-iron electric contact material and a preparation method thereof. Powder preparation and powder mixing integrated equipment is adopted, an upper-layerspraying disc is in communication with a powder spraying device, a lower-layer spraying disc is in communication with high-pressure water, dispersion strengthening phase mixed powder is loaded into the powder spraying device, and in the process of preparing silver powder through high-pressure water atomization, the dispersion strengthening phase mixed powder is sprayed into a silver solution by inert gas on a carrier, the solid dispersion strengthening phase mixed powder is wrapped by high-temperature liquid silver to form stable metallurgical bonding, then is crushed and cooled by high-pressure water to form uniform mixed powder particles, and the mixed powder particles are processed into the electric contact material through the procedures of drying, ingot pressing, extruding and the like. Compared with a traditional preparation process, the preparation method has the remarkable advantages that the distribution uniformity of the dispersion strengthening phase particles in the silvermatrix is high, the bonding strength of the dispersion strengthening phase particles and the silver matrix is high, the manufacturing process is green and environmentally friendly, and the productionperiod is short.

Description

technical field [0001] The invention relates to the field of electrical contact materials, in particular to a silver-nickel or silver ferroelectric contact material and a preparation method thereof. Background technique [0002] In the field of electrical contacts, silver-nickel and silver-iron materials occupy an important position in the entire electrical contact material system due to their excellent comprehensive electrical properties, and are mainly used in the field of contactors and relays below 25A. The iron, nickel and additives in the silver matrix belong to the dispersion strengthening phase for the silver matrix, and the arc erosion resistance and welding resistance of the silver matrix are improved through dispersion strengthening. Therefore, the dispersion strengthening phase in the silver matrix The uniformity of distribution and the bonding strength between silver and the dispersion-strengthened phase have a decisive influence on the electrical properties of ...

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): B22F9/08B22F3/20B22F3/02C22C1/04C22C1/10C22C5/06C22C32/00H01H1/023H01H1/0233H01H1/0237H01H11/04
CPCB22F9/082B22F3/02B22F3/20C22C1/0466C22C1/10C22C5/06C22C32/0052C22C32/0021H01H1/0233H01H1/0237H01H1/023H01H11/048B22F2009/0828B22F2009/0888B22F2009/088B22F2009/0892B22F2009/0844
Inventor 万岱缪仁梁张明江张海金妹鲁香粉陈松扬夏宗斌宋振阳王宝锋
Owner ZHEJIANG FUDA ALLOY MATERIALS TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com