Paste forming body for water-based aluminum-based soldering paste and water-based aluminum-based soldering paste

A paste-forming, aluminum-based technology, applied in welding media, welding equipment, welding/cutting media/materials, etc., can solve problems such as unfavorable health of workers and environmental protection, heavy odor, welding failure, etc., and achieve increased storage stability Sex, increase the activity of solder paste, avoid the effect of direct contact

Active Publication Date: 2021-11-05
ZHEJIANG ASIA GENERAL SOLDERING & BRAZING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional oil-based or solvent-based aluminum-based solder pastes have problems such as heavy smoke, heavy odor, and inconvenient cleaning during application. Moreover, due to the large amount of organic solvents used, it is very harmful to the health of workers and environmental protection.
Although the water-based aluminum-based solder paste can avoid the use of organic solvents and is very environmentally friendly, there are two technical difficulties: 1. Due to the strong activity of aluminum-based brazing powder, when water is used as a solvent, the surface of the aluminum alloy is easily contacted with water. Reaction, can not be preserved, it needs to be used immediately after adjustment, otherwise it is easy to produce a large number of air bubbles or dry, sandy, and soon lead to welding failure; 2. Due to the special requirements of brazing, aluminum-based brazing powder is required Strong activity is required. The traditional way of passivating aluminum alloy powder causes a decrease in brazing performance and is not suitable for brazing technology.

Method used

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  • Paste forming body for water-based aluminum-based soldering paste and water-based aluminum-based soldering paste
  • Paste forming body for water-based aluminum-based soldering paste and water-based aluminum-based soldering paste
  • Paste forming body for water-based aluminum-based soldering paste and water-based aluminum-based soldering paste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A water-based aluminum-based solder paste is composed of the following components by weight percentage: Si10Al90 alloy powder (with a particle size range of 100-200 mesh) 55%, potassium fluoroaluminate flux powder (with a particle size range of 500-1000 mesh) ) 22%, forming paste Ⅰ 7% and forming paste Ⅱ 16%;

[0030] Wherein, paste I includes the following components in mass percentage: 0.3% styrene-butadiene-styrene block copolymer, 97% isomerized hexadecane, polyacrylamide isoparaffin lauryl ether (305 emulsified agent) 2.7%; forming paste II includes the following components in mass percentage: methyl cellulose 2.6%, hydroxypropyl cellulose 3.2%, isopropanol 6.3%, ethylene glycol 9.5%, deionized water 78.4%.

[0031] The preparation of the above-mentioned water-based aluminum-based solder paste specifically includes: weighing according to the composition of the aluminum-based solder paste, adding the paste I into the Si10Al90 alloy powder and stirring for 30 minutes...

Embodiment 2

[0033] A water-based aluminum-based solder paste is composed of the following components by weight percentage: Si12Cu10Al78 alloy powder (with a particle size range of 100-200 mesh) 55%, potassium fluoroaluminate flux powder (with a particle size range of 500-1000 mesh) ) 20%, cesium fluoroaluminate flux powder (the particle size range is 500-1000 mesh) 2%, forming paste I 7% and forming paste II 16%;

[0034] Wherein, paste I includes the following components in mass percentage: 0.3% styrene-butadiene-styrene block copolymer, 97% isomerized hexadecane, polyacrylamide isoparaffin lauryl ether (305 emulsified agent) 2.7%; forming paste II includes the following components in mass percentage: 3.3% hydroxyethyl cellulose, 5.5% polyvinylpyrrolidone, 3.4% ethanol, 9.4% propylene glycol, 56.8% deionized water, and 21.6% formamide.

[0035] The preparation of the above-mentioned water-based aluminum-based solder paste specifically includes: weighing according to the composition of th...

Embodiment 3

[0037] A water-based aluminum-based solder paste is composed of the following components by weight percentage: Si12Cu5Zn15Al68 alloy powder (with a particle size range of 100-200 mesh) 60%, potassium fluoroaluminate flux powder (with a particle size range of 500-1000 mesh) ) 16%, cesium fluoroaluminate flux powder (the particle size range is 500-1000 mesh) 4%, forming paste I 10% and forming paste II 10%;

[0038] Wherein, paste I includes the following components in mass percentage: 0.3% styrene-butadiene-styrene block copolymer, 97% isomerized hexadecane, polyacrylamide isoparaffin lauryl ether (305 emulsified agent) 2.7%; forming paste II includes the following components in mass percentage: sodium carboxymethylcellulose 4.6%, polyethylene oxide 4.2%, ethanol 5.6%, glycerol 10.2%, deionized water 47.4%, N- Methylpyrrolidone 28.0%.

[0039]The preparation of the above-mentioned water-based aluminum-based solder paste specifically includes: weighing according to the composit...

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Abstract

The invention discloses a paste forming body for a water-based aluminum-based soldering paste and the water-based aluminum-based soldering paste. The paste forming body comprises a paste forming body I and a paste forming body II. The paste forming body I is prepared from, by weight, 0.1-0.5% of styrene-butadiene-styrene block copolymer, 95-99% of isohexadecane and 0.5-4.9% of polyacrylamide isoparaffin lauryl alcohol ether. The paste forming body II comprises, by weight, 0.1-20% of a thickening dispersant, 5-20% of a water-based additive and 60-94.9% of a water-based solvent. The water-based aluminum-based soldering paste containing the paste forming bodies has excellent storage stability and coating performance while the preventing the brazing performance from being reduced.

Description

technical field [0001] The invention belongs to the field of brazing materials, in particular to a paste body for water-based aluminum-based solder paste and the water-based aluminum-based solder paste. Background technique [0002] There are various forms of solder used in aluminum-aluminum (aluminum alloy) and aluminum-stainless steel brazing in the industry, such as strips, strips, rings, powders, etc. However, these forms of solder are supplied in specific shapes. Once the shape of the finished product is made, it is difficult to change it, so the adaptability of the process is not strong. As a paste-like brazing material, solder paste can be applied to the weld seam by manual brushing or automatic injection and feeding. The dosage is controllable, and the shape of the weld seam can be changed arbitrarily. , Welding processing of weldments with high dimensional accuracy. [0003] Traditional oil-based or solvent-based aluminum-based solder pastes have problems such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/14B23K35/28B23K35/36B23K35/40
CPCB23K35/025B23K35/286B23K35/3612B23K35/40
Inventor 张玉金霞经敬楠王彩霞张玲玲
Owner ZHEJIANG ASIA GENERAL SOLDERING & BRAZING MATERIAL
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