Not corrosive soldering flux in use for high frequency induced pressure braze welding

A high-frequency induction and non-corrosion technology, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of high energy consumption, lack of aluminum resources, high cost, etc., to save costs, save resources and energy, The effect of good flow properties

Inactive Publication Date: 2007-07-25
李昕
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Problems solved by technology

The Chinese patents whose publication numbers are CN1337296A, CN1555962A and CN1631604A disclose several improved stainless iron—a non-corrosive flux for aluminum high-frequency induction pressure brazing, aiming at improving brazing strength and brazing pass rate, but using For these improved fluxes, it is still necessary...

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0020] Example 1: Potassium tetrafluoroaluminate and potassium hexafluoroaluminate eutectic 75.4%, lithium fluoride 0.5%, nickel fluoride 0.6%, cesium fluoride 0.5%, cadmium fluoride 1.5%, zinc fluoride 1.4%, Copper fluoride 0.05%, tin fluoride 0.05%, silicon powder 10%, potassium fluorosilicate 10%. Wherein, cesium fluoride can also be replaced by cesium fluoroaluminate.

Embodiment 2

[0021] Example 2: potassium tetrafluoroaluminate and potassium hexafluoroaluminate eutectic 69.7%, lithium fluoride 1.8%, zinc fluoride 1.5%, cesium fluoride 1%, potassium fluorosilicate 26%. Likewise, cesium fluoride can also be replaced by cesium fluoroaluminate.

Embodiment 3

[0022] Example 3: 86.8% eutectic of potassium tetrafluoroaluminate and potassium hexafluoroaluminate, 1.6% of lithium fluoride, 1.6% of zinc fluoride, and 10% of silicon powder.

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PUM

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Abstract

A non-corrosion solder for the HF induced pressure soldering between stainless steel and aluminum contains the eutecticevaporate of potassium tetrafluoroaluminate and potassium hexafluoroaluminate (42-97 Wt%), lithium fluoride (0.5-8.5), Zinc fluoride (0.5-4.5), silicon powder and/or potassium pluorosilicate (2-4.5), nickel fluoride (0-3), cesium fluoride or cesium fluoroaluminate (0-3), copper fluoride (0-0.3), tin fluoride (0-0.5) and cadmium fluoride (0-3.5).

Description

technical field [0001] The invention relates to a flux for metal brazing, in particular to a non-corrosion flux for stainless iron (steel)-aluminum high-frequency induction pressure brazing. Background technique [0002] In the prior art, when high-frequency pressure brazing stainless iron (steel)-aluminum alloy parts, the brazing materials used are potassium tetraoxoaluminate and potassium hexafluoroaluminate eutectic as flux, and aluminum Silicon-based alloys are used as brazing material, and the two welding materials must be used at the same time to complete the entire brazing process. The Chinese patents whose publication numbers are CN1337296A, CN1555962A and CN1631604A disclose several improved stainless iron—a non-corrosive flux for aluminum high-frequency induction pressure brazing, aiming at improving brazing strength and brazing pass rate, but using For these improved fluxes, it is still necessary to use aluminum-silicon-based solders at the same time to complete ...

Claims

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Application Information

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IPC IPC(8): B23K35/362B23K1/002
Inventor 李昕
Owner 李昕
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