Vacuum brazing paste solder free of brazing flux, preparing method and using method of solder

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

Active Publication Date: 2020-06-19
허난징타이에어로우스페이스하이테크머터리얼스테크놀로지컴퍼니리미티드 +1
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  • Abstract
  • 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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  • Vacuum brazing paste solder free of brazing flux, preparing method and using method of solder
  • Vacuum brazing paste solder free of brazing flux, preparing method and using method of solder
  • Vacuum brazing paste solder free of brazing flux, preparing method and using method of solder

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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

The invention discloses a vacuum brazing paste solder free of brazing flux, a preparing method and a using method of the solder, relates to a paste solder free of brazing flux for vacuum brazing aluminum matrix composites, a preparing method and a using method of the solder, and aims at solving the problems that it is difficult to weld and operate members in a complex shape with a foil solder, automatic production is hindered, and the brazing flux of the existing paste solder is stacked in brazing seams and cannot be discharged out, resulting in electrochemical corrosion at welding beams and lowering of performance of welded joints. The paste solder is prepared by mixing solder alloy powder and a binding agent and is free of brazing flux. The preparing method comprises the steps of preparing the solder alloy powder and the binding agent, and mixing the solder alloy powder and the binding agent in a proportion to obtain the vacuum brazing paste solder free of brazing flux. The using method comprises the steps of adopting a brush for brushing the paste solder onto the surface of a composite, and then putting the composite in a vacuum furnace for welding. According to the vacuum brazing paste solder, the preparing method and the using method, in addition to the reduction of cost and simplification of operation, the intensity, air impermeability and safe reliability of the welded joints are also improved.

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 Applications(China)
IPC IPC(8): B23K35/28B23K1/008B23K1/20
CPCB23K1/008B23K1/20B23K35/025B23K35/286
Inventor 牛济泰邱德超王振江高增程东锋王鹏
Owner 허난징타이에어로우스페이스하이테크머터리얼스테크놀로지컴퍼니리미티드
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