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Self-fluxing aluminum solder and method for preparing the same

A technology of aluminum solder and self-flux, which is applied to the field of brazing self-flux aluminum solder for aluminum or copper and its alloys and its preparation, and can solve the problems of moisture absorption, insufficient uniform composition of core additives and outer alloys , core active material scattering and other problems

Inactive Publication Date: 2008-12-17
ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned technical defects and provide a flux-cored aluminum welding wire that can solve the problem of moisture absorption caused by the outer layer alloy and the core additive, the scattering of the core active material during use, and the core additive and core additive. A kind of self-fluxing aluminum brazing material whose outer layer alloy composition is not uniform enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0012] Example 1: The content of aluminum is 75%, and the various metal halides are: aluminum fluoride 8%; potassium fluoride 5%; cesium fluoride 5%; zinc fluoride 1.2%; J2015.8%.

example 2

[0013] Example 2: The weight percentage of aluminum alloy powder is: aluminum 16%; silicon 8%; zinc 32%; copper 12%; silver 11.76%; titanium 0.24%; or aluminum 56%; silicon 4%; zinc 8%; copper 6.4% Silver 5.36%; Titanium 0.24%; Various metal halides by weight percentage are: aluminum fluoride 6%; potassium fluoride 4%; cesium fluoride 4%; zinc fluoride 1%; J201 5%.

example 3

[0014] Example 3: The weight percent of aluminum alloy powder is: aluminum 16%; silicon 8%; zinc 32%; copper 12%; silver 11.76%; boron 0.24%; or aluminum 56%; silicon 4%; zinc 8%; copper 6.4% Silver 5.36%; Boron 0.24%; A variety of metal halides by weight percentage: Aluminum fluoride 6%; Potassium fluoride 4%; Cesium fluoride 4%; Zinc fluoride 1%; J201 5%.

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PUM

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Abstract

The invention relates to a self-flux aluminum solder that is composed of aluminum or aluminum alloy powder, and single or diverse metal halide powder, and mainly applied to the brazing of aluminum or copper, or the alloy. The invention is mainly characterized in that aluminum or aluminum alloy powder and single or diverse metal halide powder are directly pressed into wires or tubes for one time, or the wires can be winded or the tubes can be cut into rings. The self-flux aluminum solder has the advantages that, as active materials are contained, the problems of moisture absorption caused by the flux-cored aluminum welding wire composed of external alloy and core additive, the fallout of the core active materials during the using course and the uneven composition of the core additive and the external alloy can be avoided.

Description

technical field [0001] The invention belongs to the technical field of brazing materials, in particular to a self-brazing aluminum brazing filler metal for aluminum or copper and alloys thereof and a preparation method thereof. Background technique [0002] Aluminum is widely used in industrial production and social life. Due to its small specific gravity, good electrical and thermal conductivity, excellent castability and machinability, aluminum plays an irreplaceable role in modern industrial materials. In order to reduce weight, improve efficacy, and enhance aesthetics, gratifying achievements have been made in substituting aluminum for copper and aluminum for steel. [0003] The welding of aluminum is relatively difficult, and the difficulty of welding limits the application of aluminum to a certain extent. The problems in aluminum welding are mainly caused by the strong oxidation of aluminum. At present, the oxide film on the surface of aluminum and aluminum alloy is m...

Claims

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Application Information

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IPC IPC(8): B23K35/28
Inventor 龙伟民于新泉潘建军裴夤崟钟素娟李涛杨继东
Owner ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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