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CsF-RbF-AlF3 brazing flux containing nano rare-earth fluoride

A nano-rare earth and fluoride technology, which is applied in the direction of welding/welding/cutting articles, welding media, welding/cutting media/materials, etc., to achieve the effect of increasing the spreading area and high flux activity

Active Publication Date: 2017-06-13
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although the above-mentioned fluxes can realize the reliable connection of "aluminum-copper", "aluminum-steel" and "aluminum-aluminum", there are still many shortcomings and needs to be improved.

Method used

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  • CsF-RbF-AlF3 brazing flux containing nano rare-earth fluoride

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Effect test

Embodiment 1

[0038] CsF-RbF-AlF3 brazing flux containing nano-rare earth fluoride, by mass percentage (wt.%), chemical composition is: 0.02% rubidium fluoride (RbF), 48.0% cesium fluoride (CsF), 0.01% Aluminum oxide (Al 2 o 3 ), 1.0% potassium fluoride (KF), 0.001% nano cerium tetrafluoride (CeF 4 ), the balance is aluminum fluoride (AlF 3 ).

[0039] The new type of CsF-RbF-AlF3 brazing flux containing nano-rare earth fluorides obtained by the above proportioning, adopts propane as a combustible gas for flame brazing, cooperates with Zn85-Al15 brazing filler metal, Al88-Si12 brazing filler metal, and uses 5052 aluminum alloy plate+Q235 The combination of steel plate, 6063 aluminum alloy plate + T2 red copper is tested according to GB / T 11363-2008 "Test Method for Strength of Brazed Joint", and the shear strength of the brazed joint reaches 130MPa-150MPa respectively.

Embodiment 2

[0041] CsF-RbF-AlF3 brazing flux containing nano-rare earth fluoride, by mass percentage (wt.%), chemical composition is: 0.2% rubidium fluoride (RbF), 20.0% cesium fluoride (CsF), 2.0% Aluminum oxide (Al 2 o 3 ), 0.01% potassium fluoride (KF), 0.05% nano cerium tetrafluoride (CeF 4 ), the balance is aluminum fluoride (AlF 3 ).

[0042] The new type of CsF-RbF-AlF3 brazing flux containing nano-rare earth fluorides obtained by the above proportioning, adopts propane as a combustible gas for flame brazing, cooperates with Zn85-Al15 brazing filler metal, Al88-Si12 brazing filler metal, and uses 5052 aluminum alloy plate+Q235 The combination of steel plate, 6063 aluminum alloy plate + T2 red copper is tested according to GB / T 11363-2008 "Test Method for Strength of Brazed Joint", and the shear strength of the brazed joint reaches 130MPa-150MPa respectively.

Embodiment 3

[0044] CsF-RbF-AlF3 brazing flux containing nano-rare earth fluoride, by mass percentage (wt.%), chemical composition is: 0.15% rubidium fluoride (RbF), 40.0% cesium fluoride (CsF), 1.0% Aluminum oxide (Al 2 o 3 ), 0.5% potassium fluoride (KF), 0.02% nano cerium tetrafluoride (CeF 4 ), the balance is aluminum fluoride (AlF 3 ).

[0045] The new type of CsF-RbF-AlF3 brazing flux containing nano-rare earth fluorides obtained by the above proportioning, adopts propane as a combustible gas for flame brazing, cooperates with Zn85-Al15 brazing filler metal, Al88-Si12 brazing filler metal, and uses 5052 aluminum alloy plate+Q235 The combination of steel plate, 6063 aluminum alloy plate + T2 red copper is tested according to GB / T 11363-2008 "Test Method for Strength of Brazed Joint", and the shear strength of the brazed joint reaches 130MPa-150MPa respectively.

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Abstract

The invention discloses a CsF-RbF-AlF3 brazing flux containing nano rare-earth fluoride. The CsF-RbF-AlF3 brazing flux is characterized by comprising the following chemical components, by weight percent (wt.%), 0.02-0.2% of rubidium fluoride (RbF), 20.0-48.0% of cesium fluoride (CsF), 0.01-2.0% of aluminum oxide (Al2O3), 0.01-1.0% of potassium fluoride (KF), 0.001-0.05% of nano ceric fluoride (CeF4), and the balance aluminum fluoride (AlF3). The CsF-RbF-AlF3 brazing flux has higher activity than the existing brazing flux, and can meet the brazing requirements of aluminum-steel, aluminum-copper and aluminum-aluminum structures simultaneously.

Description

technical field [0001] The invention belongs to the field of brazing materials of non-metallic materials, in particular to a CsF-RbF-AlF3 brazing flux containing nanometer rare earth fluoride which can braze aluminum-steel, aluminum-copper and aluminum-aluminum. Background technique [0002] For the connection of dissimilar materials (that is, two different materials) such as aluminum-steel and aluminum-copper, brazing is more advantageous. During brazing, whether the brazing material can wet, spread and flow on the base metal is the primary problem of whether the "reliable connection" of the base metal can be realized, and the flux is to solve whether the brazing material can be on the base metal during brazing. Wetting, spreading, and flow are the key materials for reliable connection of the same or dissimilar materials. [0003] As we all know, the oxide on the surface of aluminum alloy is mainly Al 2 o 3 , MgO, MnO, CuO, SiO 2 etc., the oxides on the steel surface ar...

Claims

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Application Information

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IPC IPC(8): B23K35/363
CPCB23K35/3605B23K2103/10B23K2103/18
Inventor 陶纪明薛松柏姚震王健豪朱显明
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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