Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Preparation and application methods of brazing filler metal used for brazing between high-silicon aluminum alloy and kovar alloy

A high-silicon aluminum alloy and alloy technology, which is applied in welding equipment, metal processing equipment, welding/cutting media/materials, etc., can solve the problems of difficult connection, large differences in properties, and different elements, and achieves relatively high performance differences. Large, uniform thickness, high brightness effect

Inactive Publication Date: 2019-09-27
HENAN POLYTECHNIC UNIV +1
View PDF7 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above deficiencies, the present invention provides a method for preparing and using brazing filler metals for brazing high-silicon aluminum alloys and Kovar alloys. Larger, more difficult to connect issues

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
  • Preparation and application methods of brazing filler metal used for brazing between high-silicon aluminum alloy and kovar alloy
  • Preparation and application methods of brazing filler metal used for brazing between high-silicon aluminum alloy and kovar alloy
  • Preparation and application methods of brazing filler metal used for brazing between high-silicon aluminum alloy and kovar alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A preparation method of brazing material for welding high-silicon aluminum alloy and Kovar alloy is completed according to the following steps:

[0040] S1, taking material: Weigh the raw material according to the mass percentage of 25%Al30Si, 23%Cu, 0.5%Ni and the balance is Al, the purity of the Al, Cu, Ni and Al30Si should be higher than 99.99%;

[0041] S2, Cleaning: Grind the weighed raw materials with sandpaper to remove oxides and oil stains on the surface; then put 23% Cu into HCl aqueous solution with a mass fraction of 10% for ultrasonic cleaning for 15 minutes, and then use deionized water Wash for 15 minutes, and finally put it into an alcohol-acetone solution with a volume ratio of 1:1 to wash it for 15 minutes, and dry the liquid on the surface of Cu with a hair dryer to obtain clean Cu raw materials; put 25% Al30Si, 0.5% Ni and Al into deionized water Clean for 15 minutes, and finally put it into an alcohol-acetone solution with a volume ratio of 1:1 to c...

Embodiment 2

[0058] The difference from Example 1 is: a preparation method of brazing material for welding high-silicon aluminum alloy and Kovar alloy, S1, taking material: 25% Al30Si, 23% Cu, 1% Ni and the balance is Al Weigh raw materials.

[0059] The brazing material obtained in this embodiment can make the welding joint of high-silicon aluminum alloy and Kovar alloy dissimilar materials reach 50.24MPa, and the sealing performance can reach 10 -8 Pa·m 3 Performance indicators below / s.

Embodiment 3

[0061] The difference from Example 1 is: a preparation method of brazing material for welding high-silicon aluminum alloy and Kovar alloy, S1, taking materials: 25% Al30Si, 23% Cu, 1.5% Ni and the balance being Al Weigh raw materials.

[0062] The brazing material obtained in this embodiment can make the welding joint of high-silicon aluminum alloy and Kovar alloy dissimilar materials reach 58.37MPa, and the sealing performance can reach 10 -8 Pa·m 3 Performance indicators below / s.

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
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses preparation and application methods of brazing filler metal used for brazing between dissimilar materials, namely a high-silicon aluminum alloy and a kovar alloy. The preparation method comprises the steps that raw materials are weighed according to the fact that the brazing filler metal is composed of, by mass percent, 15%-45% of an Al30Si alloy, 18%-30% of Cu, 0.5%-5% of Ni and the balance Al; the raw materials are ground and cleaned; the raw materials are subjected to high-temperature smelting; quenching is performed for preparing the foil-shaped brazing filler metal; and the like. The application method comprises the processes that to-be-welded surfaces are pretreated; the foil-shaped brazing filler metal is pretreated; and welding is performed. The preparation and application methods provided by the invention aim at solving the problems that the performance difference between the dissimilar materials, namely high-silicon aluminum and the kovar alloy is large, and welding is difficult; and the foil-shaped brazing filler metal prepared through the method is consistent in thickness and uniform in component, the brazing filler metal has metallurgical reaction with elements in high-silicon aluminum alloy and kovar alloy base materials in the high-temperature welding process, new phases are formed, and in addition, formed weld joints are good in continuity, high in compactness, high in connecting strength and can be widely applied to T / R module shell sealing.

Description

technical field [0001] The invention relates to the technical field of electronic packaging material engineering, in particular to a method for preparing and using a brazing filler metal for brazing high-silicon aluminum alloys and Kovar alloys. Background technique [0002] As an important connection method with good effect in the connection technology of high-silicon aluminum alloy and Kovar alloy dissimilar materials, brazing is to use (or automatically generate during the process) a solder with a lower melting temperature than the base metal, and the operating temperature is lower than that of the base metal. A welding technique in which the solidus of the base metal is higher than the liquidus of the solder. During brazing, the workpiece is often heated as a whole or evenly heated over a large area around the brazing seam, so the relative deformation of the workpiece and the residual stress of the welded joint are small; since the high-silicon aluminum alloy contains ha...

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): B23K35/40B23K35/28B23K1/008B23K1/19B23K1/20
CPCB23K1/008B23K1/19B23K1/20B23K1/206B23K35/286B23K35/40
Inventor 高增杨环宇王振江纪霏巴现礼邱得超楚军龙李子发王琰牛济泰
Owner HENAN POLYTECHNIC UNIV
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
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