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Aluminum soldering paste

An aluminum brazing and solder paste technology, applied in the field of aluminum solder paste formula, can solve the problems of solder dispensing or fixing operation difficulties, affecting production efficiency, and inability to fix solder, etc., to improve product quality and production efficiency, and reduce manpower Cost, the effect of simplifying the brazing production process

Inactive Publication Date: 2014-08-20
江门市盈盛焊接材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the diversification of the structure of the brazing workpiece and the complexity of the shape of the weld, especially the irregular and dense workpieces bring great difficulties to the dispensing or fixing of the solder. Traditional solder, such as welding wire and solder sheet For brazing materials, spot welding or clamping method should be used to pre-fix the brazing material before welding, and then brush the brazing flux, which will greatly affect the production efficiency, especially for complex and dense welds. It is impossible to fix the solder by the above method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1) Aluminum-based alloy solder powder: accounts for 56% of the total weight of the solder paste. The alloy composition of aluminum-based solder powder is: Si: 12%, Cu: 0~30%, Zn: 0~8%, Mg: 0~ 1%, Sr: 0.02~0.1%, Al: balance.

[0016] 2) Potassium fluoroaluminate flux: 12% of the total weight of the solder paste.

[0017] 3) Tackifier: accounts for 3% of the total weight of the solder paste, of which hydrogenated rosin glyceride accounts for 60% of the total weight of the tackifier, and polymer EVA accounts for 40% of the total weight of the tackifier.

[0018] 4) Thickener: accounting for 8.95% of the total weight of the solder paste, of which cetearyl alcohol accounts for 60% of the total weight of the thickener, and methoxypolyethylene glycol accounts for 40% of the total weight of the thickener.

[0019] 5) Organic solvent: aliphatic hydrocarbon solvent D100, accounting for 20% of the total weight of the solder paste.

[0020] 6) Stabilizer: 0.05% of the total weigh...

Embodiment 2

[0022] 1) Aluminum-based alloy solder powder: accounts for 60% of the total weight of the solder paste. The alloy composition of aluminum-based solder powder is: Si: 5%, Cu: 20%, Zn: 5%, Mg: 0.8%, Sr: 0.1 %, Al: balance.

[0023] 2) Fluoroaluminate flux: accounting for 15% of the total weight of the solder paste, of which potassium fluoroaluminate accounts for 65% of the total weight of the flux, and cesium fluoroaluminate accounts for 35% of the total weight of the flux.

[0024] 3) Tackifier: ethylene-propylene copolymer, accounting for 6% of the total weight of the solder paste.

[0025] 4) Thickener: polyethylene n-butyl ether, accounting for 3.5% of the total weight of the solder paste.

[0026] 5) Organic solvent: accounts for 15% of the total weight of the solder paste, of which the aliphatic hydrocarbon solvent 120# solvent oil accounts for 60% of the total weight of the solvent, and the glycol derivative solvent ethylene glycol monoethyl ether accounts for 40% of the...

Embodiment 3

[0029] 1) Aluminum-based alloy solder powder: accounts for 65% of the total weight of the solder paste. The alloy composition of aluminum-based solder powder is: Si: 10%, Cu: 6%, Zn: 8%, Mg: 0.5%, Sr: 0.1 %, Al: balance.

[0030] 2) Fluoroaluminate flux: accounts for 12% of the total weight of the solder paste, including 80% potassium fluoaluminate flux and 20% cesium fluoaluminate flux.

[0031] 3) Tackifier: hydrogenated rosin glyceride accounts for 3% of the total weight of the solder paste.

[0032] 4) Thickener: Polymethacrylic acid accounts for 8.95% of the total weight of the solder paste.

[0033] 5) Organic solvent: aliphatic hydrocarbon solvent D100, accounting for 11% of the total weight of the solder paste.

[0034] 6) Stabilizer: 0.05% of the total weight of the solder paste, of which hydrogenated castor oil accounts for 55% of the total weight of the stabilizer, and triethanolamine accounts for 45% of the total weight of the stabilizer.

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Abstract

The invention discloses an aluminum-based alloy soldering paste suitable for an aluminum-stainless steel and aluminum-aluminum alloy soldering connection batch production technology aiming at the requirement of high-efficiency soldering technology. The soldering paste consists of the following components by weight percent: 1) 50-65% of aluminum-based alloy soldering material powder, 2) 10-25% of fluoroaluminate soldering flux, 3) 3-10% of tackifier, 4) 2-10% of thickening agent, 5) 10-30% of organic solvent, and 6) 0.05-0.50% of stabilizing agent. The soldering paste provided by the invention has moderate viscosity and soldering flux which is in accurate proportion, and is extremely suitable for workpieces with irregular weld joint shapes and complex structures; the soldering paste can be very simply and conveniently coated on the part of a welding element, which is required for soldering joint; working procedures such as auxiliary positioning, soldering flux coating and brushing are not required like plate-shaped or silk-shaped soldering materials; the soldering production technology is simplified; the labor cost is lowered; and the product quality and production efficiency are improved.

Description

technical field [0001] The invention relates to a brazing material, in particular to an aluminum solder paste formula for brazing of aluminum-aluminum alloy and aluminum-stainless steel. Background technique [0002] With the diversification of the structure of the brazing workpiece and the complexity of the shape of the weld, especially the irregular and dense workpieces bring great difficulties to the dispensing or fixing of the solder. Traditional solder, such as welding wire and solder sheet For brazing material, it is necessary to fix the brazing material in advance by spot welding or clamping before welding, and then brush the flux, which will greatly affect the production efficiency, especially for complex and dense welds. It is impossible to fix the solder by the above method. Contents of the invention [0003] The object of the present invention is to provide a kind of creamy solder-aluminum brazing paste containing flux, which is suitable for processes such as f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/28B23K35/363
Inventor 熊进
Owner 江门市盈盛焊接材料科技有限公司
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