A halogen-free pickling flux and its preparation method are disclosed

A flux and pickling-free technology, which is applied in the direction of manufacturing tools, welding media, welding/cutting media/materials, etc., to achieve the effects of high brazing efficiency, lower melting point, and improved activity

Active Publication Date: 2018-11-27
ZHEJIANG XINRUI WELDING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a halogen-free pickling-free flux that does not blacken the surface and is not easy to cause corrosion and penetrating pores and its preparation method

Method used

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  • A halogen-free pickling flux and its preparation method are disclosed

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Embodiment 1

[0011] Embodiment one: a kind of halogen-free pickling-free flux, which flux comprises 55 parts by weight of trimethyl borate, 35 parts of methyl alcohol, 15 parts of water, 3 parts of sodium tetraborate and 2 parts parts of boric acid.

Embodiment 2

[0012] Embodiment two: a kind of halogen-free pickling-free flux, this flux comprises the trimethyl borate that is 55 parts by weight, the methyl alcohol of 35 parts, the water of 15 parts, the sodium tetraborate of 3 parts, 2 parts of boric acid and 3 parts of potassium tetraborate.

Embodiment 3

[0013] Embodiment three: a halogen-free pickling-free flux, the flux comprising 55 parts by weight of trimethyl borate, 35 parts of methanol, 15 parts of water, 3 parts of sodium tetraborate, 2 parts of boric acid and 5 parts of potassium tetraborate.

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PUM

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Abstract

The invention discloses a halogen-free pickling flux, which comprises the following components in parts by weight: trimethyl borate 50 60 part, methanol 30 parts 40 part, water 10 part 20 part, sodium tetraborate 1 5 part, boric acid 1 3 copies. In the halogen-free pickling flux of the invention, the addition of trimethyl borate protects the workpiece from oxidation, the trimethyl borate is hydrolyzed to generate boric acid through the addition of water, the generated boric acid and sodium tetraborate form a traditional eutectic compound combination of the flux, the melting point is further reduced by the addition of sodium tetraborate, and the activity of the flux is improved. Especially, the addition of halogen is insulated, so that the surface of the brazed workpiece will not be oxidized and blackened, and corrosion and penetrating porosity are not easy to occur, and the brazing activity is high, so that the brazing efficiency is higher.

Description

technical field [0001] The invention relates to the technical field of brazing, in particular to a halogen-free pickling-free flux and a preparation method thereof. Background technique [0002] Metal welding is divided into fusion welding and brazing. The material to be welded during fusion welding, including the welding wire, is melted and solidified so that the two materials are fused together. Common electric welding, gas welding, and argon arc welding are all fusion welding; the metal to be welded during brazing does not melt, but the welding material (welding wire ) melts and adheres closely to the material to be welded, and uses the force between the atoms of the two materials to connect together. Common soldering, brazing, and lead lining are all brazing. [0003] In the traditional way, silver solder paste is usually used for brazing brass, copper and other workpieces. Silver solder paste usually contains halogen (fluoride or chloride), and the surface is oxidized ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/36B23K35/40
CPCB23K35/3612B23K35/40
Inventor 金海斌钱似舰王永洁王水庆
Owner ZHEJIANG XINRUI WELDING MATERIAL
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