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High active no-clean welding flux

A no-cleaning, flux technology, applied in welding media, welding equipment, welding/cutting media/materials, etc., can solve the problems of insufficient welding flux, low brazing seam strength, and many welding defects.

Inactive Publication Date: 2010-07-21
ZHEJIANG XINRUI WELDING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the "flux" or "gas flux" sold domestically and abroad, whether it is domestic FB401L ~ FB405L series flux (classified according to the provisions of JB / T 6045-1992 "Flux for Brazing"), or imported The flux (called Gas Flux in the United States and other countries, that is, gas flux) has the problem of "poor activity", so that in many occasions, its "fluxing" is not enough, and it is easy to produce "incomplete penetration", Quality problems such as "many welding defects" (especially defects such as pores and slag inclusions), "low brazing seam strength"

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0031] A kind of highly active no-clean flux, proportioning by mass fraction, its composition is: 45.0% trimethyl borate ((CH 3 O) 3 B), 10.0% acetone (CH 3 COCH 3 ), 0.001% cesium fluoride (CsF), 0.001% diethyl ether (CH 3 CH 2 O CH 2 CH 3 ), the balance being methanol (CH 3 OH).

[0032] The high-activity no-clean flux obtained by the above ratio has a density (20°C) in the range of 0.855-0.891, a boiling point range of 52°C-56°C, and is passed through the flux "generator" through gas (acetylene gas, liquefied petroleum gas, propane and other combustible gases) ) is added (into) the torch in the form of steam, mixed with oxygen, burned, and brazed (flame welding). Test according to GB / T 11363-2008 "Brazed Joint Strength Test Method", with T 2 Red copper and H62 brass were used as the test base material, and the commercially available B-Cu93P solder was used as the test solder. The "effective" brazing area increased by 8% and 9.5% respectively, and the strength of th...

Embodiment 2

[0034] A kind of highly active no-clean flux, proportioning by mass fraction, its composition is: 45.0% trimethyl borate ((CH 3 O) 3 B), 10.0% acetone (CH 3 COCH 3 ), 0.001% rubidium fluoride (RbF), 0.001% diethyl ether (CH 3 CH 2 O CH 2 CH 3 ), the balance being methanol (CH 3 OH).

[0035] The high-activity no-clean flux obtained by the above ratio has a density (20°C) in the range of 0.855-0.891, a boiling point range of 52°C-56°C, and is passed through the flux "generator" through gas (acetylene gas, liquefied petroleum gas, propane and other combustible gases) ) is added (into) the torch in the form of steam, mixed with oxygen, burned, and brazed (flame welding). Test according to GB / T 11363-2008 "Brazed Joint Strength Test Method", with T 2 Red copper and H62 brass were used as the test base material, and the commercially available B-Cu93P solder was used as the test solder. The "effective" brazing area increased by 8% and 9.5% respectively, and the strength of ...

Embodiment 3

[0037] A kind of highly active no-clean flux, proportioned by mass fraction, its composition is: 80.0% trimethyl borate ((CH 3 O) 3 B), 0.01% acetone (CH 3 COCH 3 ), 1.0% cesium fluoride (CsF), 2.5% diethyl ether (CH 3 CH 2 OCH 2 CH 3 ), the balance being methanol (CH 3 OH).

[0038] The high-activity no-clean flux obtained by the above ratio has a density (20°C) in the range of 0.855-0.891, a boiling point range of 52°C-56°C, and is passed through the flux "generator" through gas (acetylene gas, liquefied petroleum gas, propane and other combustible gases) ) is added (into) the torch in the form of steam, mixed with oxygen, burned, and brazed (flame welding). Test according to GB / T 11363-2008 "Brazed Joint Strength Test Method", with T 2 Red copper and H62 brass were used as the test base metal, and the commercially available B-Cu93P solder was used as the test solder. The "effective" brazing area increased by 9.5% and 10.5% respectively, and the strength of the braz...

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Abstract

The invention discloses high-activity washing-free scaling powder. According to the weight percentage, the high-activity washing-free scaling powder includes 45.0 to 80.0 percent of trimethyl borate, 0.01 to 10.0 percent of acetone, 0.001 to 1.0 percent of cesium fluoride or rubidium bifluoride, 0.001 to 2.5 percent of aether; and the rest is carbinol. When the scaling powder produced by the invention is matched with the solders like Cu-P series for soldering, the solder has excellent wetting performance and fluidness on a mother plate, can reduce the soldering defects from generating and canimprove the intensity of a soldering seam and still has the characteristics of stopping the metal surface in a soldering area from being oxidized and needing not to be washed by acid after soldering.

Description

1. Technical field [0001] The invention relates to a flux which can significantly improve the wettability and fluidity of solder and reduce welding defects, and belongs to the brazing materials in the field of metallurgy and machinery. 2. Background technology [0002] In the brazing of condensing components in the air conditioner and refrigerator industry, many products in the refrigeration accessories industry such as air conditioner compressors, refrigerator compressors, air conditioner condensers, liquid receivers, vapor-liquid separators, evaporators, and four-way reversing valves, as well as Manual and automatic flame brazing of workpieces in other industries such as bicycles, wheelchairs, radiators, radiators, etc., all require a kind of "can not only have the effect of welding, but also make the metal surface of the brazing part non-oxidized, and after welding No pickling" flux (flux) is required. [0003] At present, the "flux" or "gas flux" sold on the market at h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/36
Inventor 王水庆
Owner ZHEJIANG XINRUI WELDING MATERIAL
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