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Composite silver brazing welding paste and preparing method thereof

A composite silver brazing technology, applied in welding equipment, welding media, manufacturing tools, etc., can solve the problems of high price and increased manufacturing cost, and achieve low manufacturing cost, improved welding and brazing rate, and strong implementability Effect

Active Publication Date: 2018-07-20
WENZHOU HONGFENG ELECTRICAL ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, since both of them introduce new graphene materials and are expensive, the manufacturing cost increases

Method used

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  • Composite silver brazing welding paste and preparing method thereof
  • Composite silver brazing welding paste and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The present embodiment provides a kind of preparation method of composite silver solder paste, its implementation steps are as follows figure 1 Shown:

[0043] The first step: mix the AgCu alloy powder and the CuP alloy powder; weigh 6kg of the mixed powder and put it into the ball mill barrel, the mass ratio of the ball to material is 2:1, and weigh the stainless steel ball, and the speed is set to 30 rpm, Carry out homogeneous ball milling; obtain alloy solder powder; wherein: the mass ratio of AgCu alloy powder to CuP alloy powder is AgCu:CuP=0.5.

[0044] In this step, the AgCu alloy powder is produced by an atomization process, and of course, other methods can also be used in other embodiments.

[0045] In this step, the composition mass ratio of the AgCu alloy powder is selected as Ag:Cu=0.8;

[0046] In this step, the particle size of the AgCu alloy powder is selected as 200 mesh powder;

[0047] In this step, the grade of the CuP alloy powder is selected as C...

Embodiment 2

[0056] The present embodiment provides a kind of preparation method of composite silver solder paste, its implementation steps are as follows figure 1 Shown:

[0057] The first step: mix the AgCu alloy powder and the CuP alloy powder; weigh 6kg of the mixed powder and put it into the ball mill bucket, the ball-to-material ratio is 5:1, weigh the stainless steel ball, set the speed to 50 rpm, and carry out Homogenized ball milling to obtain alloy solder powder; wherein: the proportion of AgCu alloy powder and CuP alloy powder is AgCu:CuP=2.

[0058] In this step, the composition of the AgCu alloy powder is selected as Ag:Cu=4;

[0059] In this step, the particle size of the AgCu alloy powder is selected as 400 mesh powder;

[0060] In this step, the grade of the CuP alloy powder is selected as CuP-2;

[0061] In this step, the particle size of the CuP alloy powder is selected as 300 mesh powder.

[0062] The second step: the alloy solder powder processed in the first step is ...

Embodiment 3

[0069] The present embodiment provides a kind of preparation method of composite silver solder paste, its implementation steps are as follows figure 1 Shown:

[0070] The first step: mix the AgCu alloy powder and the CuP alloy powder; weigh 6kg of the mixed powder and put it into the ball mill bucket, the ball-to-material ratio is 3:1, weigh the stainless steel ball, set the speed to 40 rpm, and carry out Homogenized ball milling process to obtain alloy solder powder; wherein: the proportion of AgCu alloy powder and CuP alloy powder is AgCu:CuP=1.5.

[0071] In this step, the composition of the AgCu alloy powder is selected as Ag:Cu=3;

[0072] In this step, the particle size of the AgCu alloy powder is selected as 300 mesh powder;

[0073] In this step, the grade of the CuP alloy powder is selected as CuP-3;

[0074] In this step, the particle size of the CuP alloy powder is selected as 200 mesh powder.

[0075] The second step: the alloy solder powder processed in the fi...

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Abstract

The invention provides composite silver brazing welding paste. The composite silver brazing welding paste comprises components including 30-60 wt% of alloy welding powder, 10-30 wt% of brazing flux and 20-40 wt% of colloid. The alloy welding powder is composed of AgCu alloy powder and CuP alloy powder, wherein the mass ratio of the AgCu alloy powder to the CuP alloy powder meets the formula: AgCu:CuP=0.5-2. The invention further relates to a preparing method of the above welding paste. Starting from the brazing character of brazing filler metal, AgCu high-conductivity, high-heat-conduction andhigh-strength brazing filler metal and CuP high-wetability and high-joint-filling-capability brazing filler metal are guided, the component and grain size distribution combination design is adopted for the AgCu high-conductivity, high-heat-conduction and high-strength brazing filler metal and the CuP high-wetability and high-joint-filling-capability brazing filler metal, then, the colloid and thebrazing flux are added, and the composite silver brazing welding paste material is prepared through shearing emulsion machining. The composite silver brazing welding paste has the beneficial effectsthat the operation technology is simple, and feasibility is high; and the prepared welding paste material has good fluidity and high joint filling capability, and the characters of high conductivity,high heat conduction and high strength are kept after welding.

Description

technical field [0001] The invention relates to solder paste in the technical field of soldering materials, in particular to a composite silver solder paste and a preparation method thereof. Background technique [0002] Solder paste is a homogeneous mixture, a paste with certain viscosity and good thixotropy formed by mixing alloy solder powder, flux and some other additives. Silver brazing paste has a low melting point, good wettability and seam filling ability. After welding, the brazing part has the advantages of high strength, excellent electrical conductivity and corrosion resistance. It is widely used in electrical, electronic, aerospace and other devices of welding. By cooperating with the automatic dispensing device, it can be evenly applied on the workpiece to be welded at fixed points and quantitatively. It is suitable for fast resistance welding and induction welding processing, replacing soldering sheets, and solving the problem of soldering sheet offset; in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/14
CPCB23K35/025B23K35/302
Inventor 吴新合穆成法张泽忠吴冰冰黄伟陈家帆祁更新
Owner WENZHOU HONGFENG ELECTRICAL ALLOY
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