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Braze solder for air conditioner and brazing flux

A technology of brazing solder and brazing materials, applied in the direction of welding/cutting media/materials, welding media, welding equipment, etc., can solve the problems of affecting the service life of air conditioners, difficult welding processes, etc., and achieve easy cleaning and removal, and weld seams Good firmness and toughness

Inactive Publication Date: 2014-03-19
SHINAN BRANCH OF QINGDAO BLUEPRINT CULTURE COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Copper tubes and aluminum strips are the main components of air conditioners. Due to the characteristics of copper and aluminum, their welding process has always been a technical problem, which affects the service life of air conditioners.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0006] Below in conjunction with example the present invention will be further described:

[0007] A brazing solder and flux for air-conditioning, the brazing material for air-conditioning is based on Zn, an alloy containing Al, Sn, Cu elements, and its composition percentage (by weight) is Zn89-91%, Al3 .5-5.5%, Sn3.5-4.5%, Cu1.5-2.5%, the melting temperature of the solder is 370-375 ° C, which is a medium temperature solder; the Al, Sn, Cu elements can reduce the melting point of the solder , improve the fluidity and spreadability of the solder; the Cu-Al and Zn-Al can form a solid solution, so that the alloy is solid-solution strengthened and the strength of the weld is improved; the solder is used in conjunction with the solder is ZnCl 2 , NH 4 Saturated aqueous solution of Cl and KCl, in which ZnCl 2 , NH 4 Cl and KCl can remove the oxide film at high temperature, and slightly corrode the base metal, thus forming grooves, which is conducive to the wetting and spreadin...

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PUM

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Abstract

The invention relates to braze solder and brazing flux, in particular to braze solder for an air conditioner and brazing flux. Brazing filler metal is an alloy with Zn as a substrate and contains Al and Sn elements. The brazing flux matched with the brazing filler metal in use is a saturated solution of ZnC12, NH4Cl and KCl. The melting temperature of the brazing filler metal is 370-375 DEG C. The braze solder and the brazing flux are low in price, firm in brazing line, free of cold joint, high in strength, good in toughness, low in cost and high in quality. Residues are easy to wash and remove after brazing.

Description

technical field [0001] The invention relates to a brazing filler metal and flux, in particular to a brazing filler metal and flux for an air conditioner. Background technique [0002] In today's society, the use of air conditioners has become more and more popular. As the main components of the air conditioner, copper pipes and aluminum strips have always been a technical problem in their welding process due to the characteristics of copper and aluminum, which affects the service life of the air conditioner. Selecting a suitable solder and flux has always been the direction of continuous efforts of material workers. Contents of the invention [0003] The present invention aims at solving the above-mentioned problems, and provides a kind of brazing solder and flux for air-conditioning, which overcomes the disadvantages that copper and aluminum are difficult to weld, and the technical scheme it adopts is as follows: [0004] A brazing solder and flux for air-conditioning, ...

Claims

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Application Information

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IPC IPC(8): B23K35/28B23K35/363
CPCB23K35/282B23K35/362
Inventor 郇文杰王海伟
Owner SHINAN BRANCH OF QINGDAO BLUEPRINT CULTURE COMM
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