Soldering flux suitable for aluminum steel brazing

A technology of steel brazing and brazing flux, which is applied in the direction of welding medium, welding equipment, welding/welding/cutting items, etc., can solve the problems of high quality and low price of consumable materials, inability to braze aluminum-copper dissimilar materials, and quality control difficulties and other problems, to achieve the effect of low price, excellent wetting and low price

Active Publication Date: 2016-06-01
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this invention can simultaneously meet the brazing requirements of "aluminum-copper", "aluminum-steel" and "aluminum-aluminum" and has high activity, its content of rubidium fluoride (RbF) is as high as 0.12 mole to 0.5 mole, and the price Expensive, unable to meet the highly competitive manufacturing industry's need for "high quality and low price" consumable materials
[0005] Studies have shown that the oxides on the surface of aluminum alloys are mainly Al 2 o 3 , MgO, MnO, CuO, SiO 2 etc., the oxides on the steel surface are mainly FeO, Fe 2 o 3 , NiO, Cr 2 o 3 etc., the oxides on the surface of copper alloy are mainly CuO, Cu 2 O, ZnO, etc., it is very difficult to remove the oxides on the surface of aluminum alloy, steel and copper alloy at the same time with only one flux
The literature shows that the CsAlF developed in recent years 4 , KCsAlF 4 and CsF-RbF-AlF 3 Flux can remove the oxides on th

Method used

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  • Soldering flux suitable for aluminum steel brazing
  • Soldering flux suitable for aluminum steel brazing
  • Soldering flux suitable for aluminum steel brazing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A flux suitable for brazing of aluminum and steel, in terms of mass percentage (wt.%), the chemical composition is: 0.01% rubidium fluoride (RbF), 11.0% cesium fluoride (CsF), 0.01% oxide Aluminum (Al 2 o 3 ), 5.0% potassium fluoride (KF), 0.001% zinc fluoride (ZnF 2 ), the balance being aluminum fluoride (AlF 3 ).

[0043] The brazing flux suitable for aluminum-steel brazing obtained by the above-mentioned proportions uses propane as a combustible gas for flame brazing, cooperates with Zn85-Al15 brazing filler metal, and uses Q235 steel plate + 5052 aluminum alloy plate, T 2 The combination of red copper + 6063 aluminum alloy plate is tested according to GB / T11363-2008 "Test Method for Strength of Brazed Joint", and the shear strength of the brazed joint reaches 130MPa-145MPa respectively.

Embodiment 2

[0045] A flux suitable for brazing aluminum and steel, in terms of mass percentage (wt.%), the chemical composition is: 0.001% rubidium fluoride (RbF), 45.0% cesium fluoride (CsF), 2.0% oxide Aluminum (Al 2 o 3 ), 0.01% potassium fluoride (KF), 0.04% zinc fluoride (ZnF 2 ), the balance being aluminum fluoride (AlF 3 ).

[0046] The brazing flux suitable for aluminum-steel brazing obtained by the above-mentioned proportions uses propane as a combustible gas for flame brazing, cooperates with Zn85-Al15 brazing filler metal, and uses Q235 steel plate + 5052 aluminum alloy plate, T 2 The combination of red copper + 6063 aluminum alloy plate is tested according to GB / T11363-2008 "Test Method for Strength of Brazed Joint", and the shear strength of the brazed joint reaches 130MPa-145MPa respectively.

Embodiment 3

[0048] A flux suitable for brazing of aluminum and steel, in terms of mass percentage (wt.%), the chemical composition is: 0.005% rubidium fluoride (RbF), 24.0% cesium fluoride (CsF), 0.6% oxide Aluminum (Al 2 o 3 ), 1.5% potassium fluoride (KF), 0.01% zinc fluoride (ZnF 2 ), the balance being aluminum fluoride (AlF 3 ).

[0049] The brazing flux suitable for aluminum-steel brazing obtained by the above-mentioned proportions uses propane as a combustible gas for flame brazing, cooperates with Zn85-Al15 brazing filler metal, and uses Q235 steel plate + 5052 aluminum alloy plate, T 2 The combination of red copper + 6063 aluminum alloy plate is tested according to GB / T11363-2008 "Test Method for Strength of Brazed Joint", and the shear strength of the brazed joint reaches 130MPa-145MPa respectively.

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Abstract

The invention belongs to the field of brazing material of non-metallic material and discloses soldering flux suitable for aluminum steel brazing. The soldering flux is characterized by being composed of, by weight, 0.001-0.01% of rubidium fluoride (RbF), 11.0-45.0% of cesium fluoride (CsF), 0.01-2.0% of aluminum oxide (Al2O3), 0.01-5.0% of potassium fluoride (KF), 0.001-0.04% of zinc fluoride (ZnF2) and the balance aluminum fluoride (AlF3). The soldering flux can meet the brazing requirements of aluminum-steel, aluminum-copper and aluminum-aluminum and is high in activity.

Description

technical field [0001] The invention belongs to the field of brazing materials of non-metallic materials, and in particular relates to a cesium-rubidium brazing flux containing zinc fluoride active agent which can braze aluminum-steel, aluminum-copper and aluminum-aluminum. Background technique [0002] With the rapid development of aerospace, automobile, rail transit, home appliances and other industries, a large number of aluminum-aluminum structures are used. At the same time, there are more and more applications for the composite structure of copper and aluminum alloy, steel and aluminum alloy. The structure of aluminum-copper and aluminum-steel metal composite materials has been widely used in rail transit, automobiles, home appliances and other fields. application. However, there are still many unsolved problems in the welding "connection" of aluminum-steel and aluminum-copper dissimilar metal materials. [0003] The applicant has searched the literature. In the publ...

Claims

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Application Information

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IPC IPC(8): B23K35/363
CPCB23K35/3605B23K35/362B23K2103/10
Inventor 薛松柏王禾刘霜吴洁
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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