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A kind of vacuum brazing paste solder without flux, preparation method and application method thereof

A technology of brazing paste and brazing material, which is applied in welding equipment, welding/cutting media/materials, manufacturing tools, etc., can solve the problems of electrochemical corrosion of welding joints, inability to completely discharge brazing flux, and reduce the performance of welding joints, etc., to achieve Strong applicability, suitable for automatic production, and the effect of saving solder

Active Publication Date: 2021-11-09
허난징타이에어로우스페이스하이테크머터리얼스테크놀로지컴퍼니리미티드 +1
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem that the flux in the existing paste solder cannot be completely discharged in the brazing seam, which leads to electrochemical corrosion at the welded joint and reduces the performance of the welded joint, and provides vacuum brazing without flux Paste solder, preparation method and method of use thereof

Method used

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  • A kind of vacuum brazing paste solder without flux, preparation method and application method thereof
  • A kind of vacuum brazing paste solder without flux, preparation method and application method thereof
  • A kind of vacuum brazing paste solder without flux, preparation method and application method thereof

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specific Embodiment approach 1

[0035] Specific embodiment one: the present embodiment does not contain brazing flux and the vacuum brazing paste solder is composed of 45% to 60% solder alloy powder and 40% to 55% binder according to the mass fraction; the paste solder No brazing flux is contained in the material; the brazing alloy powder is prepared from 6% to 10% Mg, 15% to 20% Cu and 70% to 75% Al according to the mass fraction; the binder is prepared from It consists of 75%-85% hexanediol, 8%-12% rosin resin, 2%-6% n-decyl alcohol and 1.5%-4% glycerin; the particle size of the solder alloy powder is less than 49 μm.

specific Embodiment approach 2

[0036] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that transition group elements are also added to the vacuum brazing paste solder without flux, and the addition amount of the transition group elements is 0.1%. ~3.5%. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0037]Embodiment 3: This embodiment is different from Embodiment 1 or Embodiment 2 in that: the transition group element is Ti. Others are the same as in the first or second embodiment.

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Abstract

Disclosed are a vacuum brazing paste solder without flux, a preparation method and a use method thereof. The invention relates to a paste brazing filler metal for vacuum brazing aluminum-based composite materials without brazing flux, a preparation method and a use method thereof. It is to solve the difficulty of welding assembly and operation of foil-shaped solder for components with complex shapes, which is not conducive to automatic production, and the flux in the existing paste solder cannot be discharged in the brazing seam, resulting in electrochemical corrosion at the weld , reducing the performance of welded joints. The paste solder of the present invention is prepared by mixing solder alloy powder and binder, and does not contain solder. The preparation method comprises preparing solder alloy powder, preparing a binder, and mixing the two in proportion to obtain a vacuum brazing paste solder without flux. The method of use is to use a brush to brush the paste solder on the surface of the composite material and then put it into a vacuum furnace for welding. The invention reduces the cost and simplifies the operation while improving the strength, airtightness and safety reliability of the welded joint.

Description

technical field [0001] The invention relates to a paste solder for vacuum brazing aluminum-based composite materials, a preparation method and a use method thereof. Background technique [0002] In recent years, with the development of science and technology, SiCp / Al composite materials have attracted more and more researchers' attention. Because of their high specific strength, high specific modulus, high temperature resistance, corrosion resistance, and Wear and tear, good thermal conductivity, small linear expansion coefficient, strong radiation resistance, etc., have broad application prospects in aerospace, weaponry, electronics, automobiles, instruments and other fields, especially in phased array radar T / R modules In the field of electronic packaging, the combination of light weight, heat conduction and anti-resonance is particularly favored. At present, for the welding of SiCp / Al composite materials, the commonly used welding method is vacuum brazing. However, the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/28B23K1/008B23K1/20
CPCB23K1/008B23K1/20B23K35/025B23K35/286
Inventor 牛济泰邱得超王振江高增程东锋王鹏
Owner 허난징타이에어로우스페이스하이테크머터리얼스테크놀로지컴퍼니리미티드
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