Brazing flux suitable for brazing aluminium and steel

A technology of brazing flux and steel brazing, which is applied in the direction of welding medium, welding equipment, welding/welding/cutting items, etc., can solve the problems of complex formula, high price and high cost, and achieve the goal of simple preparation process, low price and low price Effect

Active Publication Date: 2016-06-08
ZHEJIANG XINRUI WELDING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the invention can simultaneously meet the brazing requirements of "aluminum-copper", "aluminum-steel" and "aluminum-aluminum" and has high activity, the content of rubidium fluoride (RbF) is as high as 0.12 mole-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 the surface of alum

Method used

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  • Brazing flux suitable for brazing aluminium and steel
  • Brazing flux suitable for brazing aluminium and steel
  • Brazing flux suitable for brazing aluminium and steel

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A flux suitable for brazing aluminum and steel. The chemical composition is based on mass percentage (wt.%): 0.001% rubidium fluoride (RbF), 45.0% cesium fluoride (CsF), 2.0% hydrogen Alumina (Al(HO) 3 ), 0.01% potassium fluoride (KF), 0.04% zinc fluoride (ZnF 2 ), the balance is aluminum fluoride (AlF 3 ).

[0030] The new type of flux suitable for aluminum and steel brazing obtained from the above ratio uses propane as a combustible gas for flame brazing, with Zn85-Al15 brazing filler metal, Q235 steel plate + 5052 aluminum alloy plate, T 2 The combination of red copper + 6063 aluminum alloy plate was tested in accordance with GB / T11363-2008 "Brazed Joint Strength Test Method", and the shear strength of the brazed joint reached 120MPa~145MPa respectively.

Embodiment 2

[0032] A flux suitable for brazing aluminum and steel. The chemical composition is based on mass percentage (wt.%): 0.01% rubidium fluoride (RbF), 11.0% cesium fluoride (CsF), and 0.01% hydrogen. Alumina (Al(HO) 3 ), 5.0% potassium fluoride (KF), 0.001% zinc fluoride (ZnF 2 ), the balance is aluminum fluoride (AlF 3 ).

[0033] The new type of flux suitable for aluminum and steel brazing obtained from the above ratio uses propane as a combustible gas for flame brazing, with Zn85-Al15 brazing filler metal, Q235 steel plate + 5052 aluminum alloy plate, T 2 The combination of red copper + 6063 aluminum alloy plate was tested in accordance with GB / T11363-2008 "Brazed Joint Strength Test Method", and the shear strength of the brazed joint reached 120MPa~145MPa respectively.

Embodiment 3

[0035] A flux suitable for brazing aluminum and steel. The chemical composition is based on mass percentage (wt.%): 0.005% rubidium fluoride (RbF), 25.0% cesium fluoride (CsF), 0.5% hydrogen Alumina (Al(HO) 3 ), 1.5% potassium fluoride (KF), 0.01% zinc fluoride (ZnF 2 ), the balance is aluminum fluoride (AlF 3 ).

[0036] The new type of flux suitable for aluminum and steel brazing obtained from the above ratio uses propane as a combustible gas for flame brazing, with Zn85-Al15 brazing filler metal, Q235 steel plate + 5052 aluminum alloy plate, T 2 The combination of red copper + 6063 aluminum alloy plate was tested in accordance with GB / T11363-2008 "Brazed Joint Strength Test Method", and the shear strength of the brazed joint reached 120MPa~145MPa respectively.

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Abstract

The invention relates to a brazing flux suitable for brazing aluminium and steel, and belongs to the field of non-metallic brazing materials. The brazing flux comprises the following components in percent by mass: 0.001-0.01 percent of rubidium fluoride, 11.0-45.0 percent of cesium fluoride, 0.01-2.0 percent of aluminium hydroxide, 0.01-5.0 percent of potassium fluoride, 0.01-0.04 percent of zinc fluoride, and the balance of aluminum fluoride. The brazing flux can meet the requirements of aluminium-steel brazing, aluminium-copper brazing and aluminium-aluminium brazing synchronously and is high in activity.

Description

Technical field [0001] The invention belongs to the field of brazing materials of non-metallic materials, and specifically relates to a cesium rubidium flux containing zinc fluoride capable of brazing aluminum-steel, aluminum-copper and aluminum-aluminum. Background technique [0002] With the rapid development of aerospace, automotive, rail transit, home appliances and other industries, aluminum-aluminum structures have been widely adopted. At the same time, there are more and more applications for composite structures of copper and aluminum alloys, steel and aluminum alloys, and aluminum-steel and aluminum-copper metal composite structures have been widely used in automobiles, home appliances and other fields. However, so far, there are still many unsolved problems in the welding of aluminum-steel and aluminum-copper metal composite materials. [0003] The applicant conducted a literature search. Among the published Chinese patent documents, such as "A new type of flux for brazi...

Claims

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Application Information

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IPC IPC(8): B23K35/363B23K35/40
CPCB23K35/3605B23K35/40B23K2103/10B23K2103/18
Inventor 姚震王水庆娄银斌
Owner ZHEJIANG XINRUI WELDING MATERIAL
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