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

Silver-based brazing filler metal alloy, preparation method of silver-based brazing filler metal alloy, and preparation methods of foil strip and wire

A silver-based solder and alloy technology, applied in metal processing equipment, manufacturing tools, welding equipment, etc., can solve the problems of high welding temperature and inconsistent melting point of alloy solder, so as to prevent pollution, reduce welding cost, reduce The effect of the brazing process

Active Publication Date: 2020-12-11
KUNMING INST OF PRECIOUS METALS
View PDF7 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of welding structural parts such as Kovar alloy, stainless steel and copper, the brazing filler metal omits the nickel plating process of Ag-28Cu alloy brazing filler metal; at the same time, the melting point of the brazing filler metal alloy is 760 ± 15°C, which is equivalent to that of Ag-28Cu. Solve the problem of high welding temperature and inconsistent melting point of Ag-28Cu-xNi (x=0.75, 1, 2, wt%) alloy solder

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-based brazing filler metal alloy, preparation method of silver-based brazing filler metal alloy, and preparation methods of foil strip and wire
  • Silver-based brazing filler metal alloy, preparation method of silver-based brazing filler metal alloy, and preparation methods of foil strip and wire
  • Silver-based brazing filler metal alloy, preparation method of silver-based brazing filler metal alloy, and preparation methods of foil strip and wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] 1) Using silver, oxygen-free copper, gallium, nickel, cobalt, gold, indium and ytterbium with a purity of 99.99% as raw materials, the components and mass percentages of the selected raw materials are: Cu, 27%; Ga, 4%; Ni , 0.05%; Co, 0.05%; Au, 0.02%; In, 0.5%; Yb, 0.02%; Wherein, the shape of the copper material should be a sheet, and the copper sheet is used to wrap all the indium. In addition, rare earth elements are added in the form of a master alloy by refining silver and ytterbium, which account for 30% of the total silver content. The preparation steps of the silver-ytterbium master alloy are as follows: successively put the silver accounting for 30% of the total silver and all the ytterbium raw materials into the medium-frequency induction melting furnace. Under the argon protective atmosphere with a pressure of 0.05MPa in the furnace, adjust the melting voltage to 30V, the current to 300A, and raise the temperature to the target heating temperature of 1200°C...

Embodiment 2

[0055] 1) Using silver, oxygen-free copper, gallium, nickel, iron, platinum, tin and samarium with a purity of 99.99% as raw materials, the components and mass percentages of the selected raw materials are: Cu, 26%; Ga, 5%; Ni , 0.05%; Fe, 0.02%; Pt, 0.02%; Sn, 0.5%; Sm, 0.02%; Among them, the shape of the copper material should be sheet, and the copper sheet is used to wrap all the tin. In addition, rare earth elements are added in the form of a master alloy by refining silver and samarium, which account for 35% of the total silver content. The preparation steps of the silver-samarium master alloy are as follows: successively put the silver accounting for 30% of the total silver and all the samarium raw materials into the medium-frequency induction melting furnace. Under an argon protective atmosphere with a pressure of 0.06MPa in the furnace, adjust the melting voltage to 35V, the current to 350A, and raise the temperature to the target heating temperature of 1300°C. After ...

Embodiment 3

[0061] 1) Using silver, oxygen-free copper, gallium, cobalt, iron, palladium, indium and europium with a purity of 99.99% as raw materials, the components and mass percentages of the selected raw materials are: Cu, 28%; Ga, 5%; Co , 0.1%; Fe, 0.05%; Pd, 0.02%; In, 0.5%; Eu, 0.02%; Wherein, the shape of the copper material should be a sheet, and the copper sheet is used to wrap all the indium. In addition, rare earth elements are added in the form of a master alloy by refining silver and europium, which account for 30% of the total silver content. The preparation steps of the silver-europium master alloy are as follows: successively put the silver accounting for 30% of the total silver and all the europium raw materials into the medium-frequency induction melting furnace. Under the protective atmosphere of argon gas with a pressure of 0.07MPa in the furnace, adjust the melting voltage to 25V, the current to 250A, and raise the temperature to the target heating temperature of 1...

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
thicknessaaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a silver-based brazing filler metal alloy. The silver-based brazing filler metal alloy comprises the following components of, in percentage by mass, 26%-28% of Cu; 3.5%-5.5% ofGa; at least two of the following elements of 0.001%-0.5% of Ni; 0.001%-0.5% of Co; 0.001%-0.5% of Fe; at least one of the following elements of 0.001%-0.5% of Au; 0.001%-0.5% of Pt; 0.001%-0.5% of Pd; at least one of the following elements of 0.001%-0.5% of In; 0.001%-0.5% of Sn; at least one of the following elements of La, Ce, Pr, Nd, Sm, Eu, Er, Yb, Y and Sc; and the balance Ag. The inventionfurther provides a preparation method of the silver-based brazing filler metal alloy and preparation methods of a foil strip and a wire. When the silver-based brazing filler metal alloy is used for welding a vacuum electronic device, a nickel plating process is omitted, and environmental pollution is prevented; meanwhile, the problems of high welding temperature and inconsistent melt flow pointsof Ag-28Cu-xNi alloy are solved; and the brazing filler metal alloy is good in brazing manufacturability and good in wettability, the brazing rate of kovar alloy, stainless steel and the like is higher than 95%, and the shear strength sigma b of a brazed joint is larger than or equal to 285 MPa.

Description

technical field [0001] The invention belongs to the technical field of brazing materials, and in particular relates to a silver-based brazing material alloy and a preparation method thereof, as well as a preparation method of foil strips and wires, which are used for welding components of vacuum electronic devices. Background technique [0002] Compared with other vacuum solders for vacuum electronic devices, silver-based solders have become the most widely used brazing materials in production and application due to their extremely high cost performance and unparalleled advantages, and have also become widely recognized as a suitable vacuum solder. Excellent material for electronic sealing. Silver-based solder has a moderate melting point, good manufacturability, good airtightness of welded joints, and good strength, toughness, electrical conductivity, thermal conductivity and corrosion resistance. It is widely used in electronics, electrical engineering, electrical applianc...

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): B23K35/30B23K35/40B23K35/14
CPCB23K35/3006B23K35/0227B23K35/0233B23K35/40
Inventor 方继恒谢明陈永泰马洪伟杨有才张吉明胡洁琼王松
Owner KUNMING INST OF PRECIOUS METALS
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