Scaling powder for aluminium soldering tin wire core and preparation method thereof

A brazing and flux technology, applied in welding equipment, welding medium, manufacturing tools, etc., can solve the problems of strong corrosiveness, limited flux activity, difficult to use flux-cored solder wire to produce, etc. The effect of film effect, good curing effect and high spreading rate

Inactive Publication Date: 2009-04-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This flux is a reactive flux with strong corrosiveness
At the same time, the flux must be effective at a temperature above 450°C, and the flux cannot become a uniform fluid at a temperature of 130°C, so it is not suitable for solder wire cores
The flux composition (percentage by weight) described in "Aluminum and Aluminum Alloy Soldering Flux and Its Use" (Patent No. 88100868) applied by Fujian Normal University is: 1-50% of amino-containing organic fluoroborate, heavy metal fluorine Borate 0.5-50% and amino alcohol 10-98%; the soldering temperature of this flux is high (3

Method used

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  • Scaling powder for aluminium soldering tin wire core and preparation method thereof
  • Scaling powder for aluminium soldering tin wire core and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of flux for aluminum brazing solder wire core, by weight percentage, its formula consists of:

[0039] (1)Foral AX Fully Hydrogenated Rosin 22%

[0040] (2) Ammonium fluoroborate 24%

[0041] (3) Triethanolamine 12%

[0042] (4) β-Hydroxyethylethylenediamine 35.1%

[0043] (5) Zinc chloride (ZnCl 2 ) 6%

[0044] (6) tin chloride (SnCl 2 ) 0.8%

[0045] (7) FC4432 0.1%

[0046] Preparation method: add ammonium fluoroborate, zinc chloride (ZnCl 2 ), tin chloride (SnCl 2 ), fluorocarbon surfactant (FC4432), triethanolamine, β-hydroxyethylethylenediamine, heated to 90°C and continuously stirred for 32min. After the raw materials are fully dissolved and mixed, the temperature is raised to 130°C, and Foral AX perhydrogenated rosin is added, and a yellow transparent liquid is obtained after continuous stirring for 12 minutes. Cool the liquid to room temperature to obtain a solid flux for aluminum brazing solder wire cores.

Embodiment 2

[0048] A kind of flux for aluminum brazing solder wire core, by weight percentage, its formula consists of:

[0049] (1) KE-100 Rosin 14%

[0050] (2) Ammonium fluoroborate 16%

[0051] (3) Diethanolamine 15%

[0052] (4) Triethylenetetramine 38%

[0053] (5) Zinc stearate 10%

[0054] (6) Stannous octoate 6%

[0055] (7) FC4430 1%

[0056] Preparation method: Add ammonium fluoroborate, stannous octoate, zinc stearate, diethanolamine, triethylenetetramine, and FC4430 in proportion to the reactor, heat to 95°C and continuously stir for 32min. After the raw materials are fully dissolved and mixed, the temperature is raised to 135°C, then KE-100 rosin is added and stirred continuously for 12 minutes to obtain a yellow transparent liquid. Cool the liquid to room temperature to obtain a solid flux for aluminum brazing solder wire cores.

Embodiment 3

[0058] A kind of flux for aluminum brazing solder wire core, by weight percentage, its formula consists of:

[0059] (1) B140 polymerized rosin 12%

[0060] (2) KR-610 Rosin 10%

[0061] (3) Ammonium fluoroborate 12%

[0062] (4) Triethanolamine 11%

[0063] (5) NN-Dimethyldodecylamine 42%

[0064] (6) Active Zinc Oxide 8%

[0065] (7) Stannous octoate 4%

[0066] (8) F502 1%

[0067] Preparation method: Add ammonium fluoroborate, active zinc oxide, stannous octoate, triethanolamine, F502, and NN-dimethyldodecylamine in proportion to the reactor, heat to 92°C and continuously stir for 36 minutes. After the raw materials are fully dissolved and mixed, the temperature is raised to 135°C, then B140 polymerized rosin and KR610 rosin are added and stirred continuously for 15 minutes to obtain a yellow transparent liquid. Cool the liquid to room temperature to obtain a solid flux for aluminum brazing solder wire cores.

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Abstract

The invention relates to a soldering flux for a soldering tin wire core through aluminium soldering and a preparation method thereof. The soldering flux is used for an inner core of a soldering tin wire through aluminium soldering or aluminium alloy soldering. The soldering flux comprises the following compositions in a formula in weight percentage: 14 to 28 percent of modified resin, 12 to 24 percent of ammonium borofluoride, 38 to 56 percent of organic amine, 4 to 10 percent of zinc source, 0.5 to 8 percent of tin salt and 0.1 to 2 percent of a fluorin surfactant. The zinc source is zinc salt, zinc powder or activated zinc oxide; the tin salt is inorganic tin salt or organic acid tin; and the fluorin surfactant is one or two of FC4430, FC4432, F5010, FSN-100, F501, F502 and FS-300. The soldering flux is in a solid state at normal temperature, has the characteristics of having good stiffness, high activity and simple preparation process, remarkably improving solderability of a soldering material and the cleanness of a weld spot and the like and is suitable for producing the soldering tin wire containing the soldering flux in the core and soldering aluminum and aluminum alloy.

Description

technical field [0001] The invention relates to an aluminum and aluminum alloy soldering flux and a preparation method thereof. The flux is used for the inner core of solder wire for soldering of aluminum and aluminum alloys, and belongs to the technical field of soldering of electronic and electrical products. The flux for aluminum brazing solder wire cores of the invention is also suitable for soldering nickel-based alloys and stainless steel materials. Background technique [0002] The thermal conductivity and electrical conductivity of aluminum and aluminum alloys are similar to those of copper, but their production costs and prices are lower than those of copper. Aluminum has long been desired to replace the use of copper in the electronics industry. However, the brazing weldability of aluminum and its alloys is much more difficult than that of other metals (alloys). The main reason is that there is a very dense oxide film on the surface of aluminum and its alloys (Al...

Claims

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Application Information

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IPC IPC(8): B23K35/362
Inventor 张新平刘亮岐尹立孟
Owner SOUTH CHINA UNIV OF TECH
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